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Mazda2012–2023 Critical issues documented

Mazda CX-5: common faults & what to check

Thinking about buying a used Mazda CX-5 (2012–2023) in New Zealand? We've documented 36 known faults for this model spanning engine, brakes, body & rust, and transmission. Each researched and verified before it's published. The most serious issues here are rated critical. Every one is listed below with its symptoms and repair cost, and each has its own page with where to look and what to ask the seller. Free, no account needed.

Check this exact Mazda CX-5

  • Odometer history
  • Money owing
  • Reported stolen
  • Ownership history
  • Official NZ vehicle register data
  • NZ owned and operated

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36

Documented faults

Critical

Most serious

$450–$2,200

Typical repair

7

Systems covered

Which Mazda CX-5 are you looking at?

7 generation variants documented. Pick the shape you recognise: the faults, the servicing and the timeline below all narrow to it. Free, no account needed.

Now narrow it to the engine

A 1.8 and a 2.4 of the same car do not fail the same way, so the faults below narrow to the engine as well as the year. Free, no account needed.

Start your free check on this Mazda CX-5

No plate needed. You get the risk score, the buyer's checklist and the guided inspection for the exact car you picked above — not the whole nameplate.

Mazda CX-5Engine not picked yet

Pick the engine above first: the CX-5 came with 3, and without it the report has to show all of their faults. Pick the engine

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Can't confirm for this car

Mazda CX-5

Nothing has been narrowed yet, so nothing below is a claim about a particular car. Pick a year and an engine to see which faults apply.

Tell us the engine, or check the engine code on the car, before relying on this.

matched on no vehicle context

What to look out for

The checks worth doing on a Mazda CX-5 before you hand over any money. Every documented fault is listed below, each with its own page.

  • Serious issue

    Remove oil dipstick and check for a rising oil level, thin consistency, or diesel odour.

    See why

    SKYACTIV-D 2.2 Injector Fuel Return Pipe Cracking and Oil Dilution

    The plastic fuel leak-off/return pipes connecting the diesel injectors crack or split, allowing diesel fuel to enter the engine oil via the camshaft cover gallery. Oil dilution degrades lubrication rapidly and, if undetected, leads to accelerated bearing wear and potentially catastrophic engine failure. The failure is driven by thermal cycling fatigue of the plastic fittings and pipe material over time.

    What you would notice

    • Oil level on dipstick rising above maximum between service intervals
    • Strong diesel odour when engine oil cap is removed or dipstick is pulled
    • Thin, pale-coloured oil on dipstick that smears without resistance
    • White or blue-grey smoke from exhaust on startup after the vehicle has sat overnight

    Typically $650–$1,600 to put right.

  • Serious issue

    Inspect rubber boots for splits, tears, or missing sections.

    See why

    Brake Caliper Guide Pin Corrosion and Seizure

    The sliding-pin brake calipers fitted to both the front and rear axles of the KE CX-5 rely on two steel guide pins per caliper to allow the caliper body to slide laterally as pads wear. The rubber boots that seal these pins deteriorate with age and road grime exposure, allowing moisture to penetrate and corrode the pin surface. A seized guide pin prevents the caliper from retracting fully after braking, causing continuous pad-to-disc contact, severe uneven pad wear, brake drag, and rotor overheating. In NZ coastal environments this failure occurs at relatively low mileage.

    What you would notice

    • Significantly uneven brake pad wear with the inner pad worn to metal while the outer pad retains material, or vice versa
    • Brake drag causing the vehicle to pull to one side under moderate braking
    • Excessive brake dust accumulation on one wheel compared to the opposite side
    • Burning smell from a wheel after normal driving, indicating continuous rotor contact and heat build-up

    Typically $150–$1,100 to put right.

  • Serious issue

    Ask for documented evidence of TSB R073/15 camshaft inspection at a Mazda dealer.

    See why

    SkyActiv-D Exhaust Camshaft Lobe Premature Wear (Mazda TSB R073/15)

    On 2012–2018 SkyActiv-D engines the exhaust camshaft lobes are manufactured from relatively soft material that wears prematurely against the rocker arms, typically manifesting after 60,000–100,000 km. Worn lobe material generates metallic swarf that circulates in the lubrication system and settles in the oil pump pickup strainer; a partially or fully blocked strainer starves the engine and turbocharger of oil pressure, which can escalate to catastrophic engine failure. Mazda issued TSB R073/15 instructing dealers on the camshaft inspection procedure and authorising replacement under goodwill warranty on affected units.

    What you would notice

    • Persistent ticking or tapping noise from the cylinder head at idle, worse when cold
    • Low oil pressure warning lamp illuminating
    • Sudden loss of engine power or an engine that stops without warning
    • Metallic grey debris visible at the oil filler cap or on the dipstick
    • Vacuum brake booster losing assistance due to pump driven off the worn camshaft

    Typically $3,000–$7,000 to put right.

  • Serious issue

    Review service history for strict oil change intervals — the 2.5T requires quality full-synthetic oil changed at or below 10,000 km.

    See why

    SkyActiv-G 2.5T Turbo Oil Feed Banjo Bolt Carbon Coking

    The 2.5-litre turbocharged SkyActiv-G engine (PE-VPS) in the KF CX-5 shares a documented oil feed banjo bolt coking issue with the CX-8 and CX-9 TC. Carbon deposits accumulate inside the small restrictive orifice of the banjo bolt in the turbocharger oil feed line, progressively restricting oil flow to the turbo bearing. Insufficient lubrication causes accelerated bearing wear and eventual turbo failure. The condition worsens with extended oil change intervals and short-trip use that prevents full oil temperature stabilisation and accelerates sludge formation.

    What you would notice

    • Turbo whine or bearing noise under acceleration, distinct from normal turbo spool sound
    • Blue-grey smoke from exhaust under boost or on deceleration and throttle lift
    • Oil consumption without any visible external leak
    • Check engine light or boost-pressure-related fault codes
    • Reduced power and flat acceleration compared to a healthy 2.5T

    Typically $450–$5,500 to put right.

  • Serious issue

    Scan ECU for P0087 and related fuel pressure fault codes, including freeze frame data.

    See why

    HPFP Drive Shaft Wear, Low Fuel Rail Pressure P0087

    The high-pressure fuel injection pump on the 2.2L SH-VPTS diesel is driven via a camshaft-driven shaft and coupling. Premature wear of the pump drive shaft or its interface with the camshaft drive lobe reduces the pump's ability to generate adequate fuel rail pressure. This logs fault code P0087 (fuel rail or system pressure too low) and can also set P0192 or related rail pressure sensor codes. Symptoms include difficult hot restart, stalling at idle, rough running under moderate load, and reduced power. If left unaddressed, insufficient lubrication and pressure can damage common-rail injectors. Full HPFP and drive shaft replacement is the required fix.

    What you would notice

    • Hard or extended cranking required to start when engine is warm
    • Stalling at idle, especially after a hot restart
    • P0087 fuel rail or system pressure too low fault code
    • Rough or lumpy running under moderate throttle load
    • Reduced engine power
    • Possible injector-related secondary fault codes if pressure deficit is prolonged

    Typically $1,800–$4,800 to put right.

  • Costly issue

    Scan ECU for DPF soot load percentage and stored fault codes.

    See why

    DPF Clogging from Short Urban Trips (2.2D)

    The 2.2L SH-VPTS diesel relies on passive regeneration at sustained speeds above approximately 60 km/h for 20-plus minutes to burn off accumulated soot in the diesel particulate filter. Vehicles used predominantly for urban journeys under 15 km never reach regeneration conditions. Soot levels build until the DPF warning illuminates and the ECU triggers limp mode to limit further clogging. Forced active regeneration via dealer scan tool or extended highway run is required at minimum; heavily blocked filters need replacement. Ongoing short-trip use will cause rapid re-blocking.

    What you would notice

    • Amber DPF warning light on dash
    • Noticeable power reduction or limp mode
    • Elevated idle speed during attempted passive regen
    • Increased fuel consumption
    • Occasional heavy soot smell from exhaust
    • Engine oil level rising slightly from fuel dilution during regen attempts

    Typically $250–$3,800 to put right.

See all 36 documented issuesEverything researched for the Mazda CX-5, including 6 rated critical.
Depends on which engine this Mazda CX-5 has — 36Each of these is documented for one particular engine. Pick the year and engine above to see which of them apply.
Engine, transmission & cooling17

01SkyActiv-D Exhaust Camshaft Lobe Premature Wear (Mazda TSB R073/15)

Ask for documented evidence of TSB R073/15 camshaft inspection at a Mazda dealer.diesel2012–2018Engine
OccasionalEngine $3,000–$7,000 to fix

Can't confirm for this car

On 2012–2018 SkyActiv-D engines the exhaust camshaft lobes are manufactured from relatively soft material that wears prematurely against the rocker arms, typically manifesting after 60,000–100,000 km. Worn lobe material generates metallic swarf that circulates in the lubrication system and settles in the oil pump pickup strainer; a partially or fully blocked strainer starves the engine and turbocharger of oil pressure, which can escalate to catastrophic engine failure. Mazda issued TSB R073/15 instructing dealers on the camshaft inspection procedure and authorising replacement under goodwill warranty on affected units.

Symptoms to notice

  • Persistent ticking or tapping noise from the cylinder head at idle, worse when cold
  • Low oil pressure warning lamp illuminating
  • Sudden loss of engine power or an engine that stops without warning
  • Metallic grey debris visible at the oil filler cap or on the dipstick
  • Vacuum brake booster losing assistance due to pump driven off the worn camshaft

What to check

  1. Ask for documented evidence of TSB R073/15 camshaft inspection at a Mazda dealer.
  2. Listen for persistent ticking or tapping at idle that worsens when cold.
  3. On any pre-2019 diesel CX-5 above 80,000 km, insist on a pre-purchase Mazda dealer inspection before committing.
  4. Remove the oil filler cap and look for metallic debris or a grey metallic sheen in the oil.

Where to look: Exhaust camshaft on top of the cylinder head; secondary contamination via oil pump pickup strainer in the sump

Parts involved: Turbocharger.

Ask the seller

  • “Has Mazda TSB R073/15 camshaft inspection been carried out at a Mazda dealer, and is there paperwork to confirm it?”
  • “Has the engine ever shown a low oil pressure warning, or suffered a sudden loss of power?”
  • “When was the last oil change, at what mileage, and what oil specification was used?”

02SkyActiv-G 2.5T Turbo Oil Feed Banjo Bolt Carbon Coking

Review service history for strict oil change intervals — the 2.5T requires quality full-synthetic oil changed at or below 10,000 km.petrol2018 onwardEngine
OccasionalEngine $450–$5,500 to fix

Can't confirm for this car

The 2.5-litre turbocharged SkyActiv-G engine (PE-VPS) in the KF CX-5 shares a documented oil feed banjo bolt coking issue with the CX-8 and CX-9 TC. Carbon deposits accumulate inside the small restrictive orifice of the banjo bolt in the turbocharger oil feed line, progressively restricting oil flow to the turbo bearing. Insufficient lubrication causes accelerated bearing wear and eventual turbo failure. The condition worsens with extended oil change intervals and short-trip use that prevents full oil temperature stabilisation and accelerates sludge formation.

Symptoms to notice

  • Turbo whine or bearing noise under acceleration, distinct from normal turbo spool sound
  • Blue-grey smoke from exhaust under boost or on deceleration and throttle lift
  • Oil consumption without any visible external leak
  • Check engine light or boost-pressure-related fault codes
  • Reduced power and flat acceleration compared to a healthy 2.5T

What to check

  1. Review service history for strict oil change intervals — the 2.5T requires quality full-synthetic oil changed at or below 10,000 km.
  2. Check for oil consumption by reviewing the dipstick.
  3. Listen for turbo bearing noise under a sustained boost test drive.
  4. Check for blue smoke in mirrors when lifting off after acceleration.
  5. If a workshop inspection is possible: Remove and inspect the turbo oil feed banjo bolt restrictor orifice for carbon deposit blockage.

Where to look: Turbocharger oil feed line, banjo bolt fitting at the turbocharger oil inlet

Parts involved: Turbocharger.

Ask the seller

  • “What oil brand and grade has been used, and at what kilometre interval?”
  • “Has any turbo noise or blue exhaust smoke been noticed?”
  • “Has the turbo oil feed line or banjo bolt been inspected, cleaned, or replaced?”
  • “Has oil consumption been higher than expected between services?”

03HPFP Drive Shaft Wear, Low Fuel Rail Pressure P0087

Scan ECU for P0087 and related fuel pressure fault codes, including freeze frame data.diesel2017 onwardEngine
OccasionalEngine $1,800–$4,800 to fix

Can't confirm for this car

The high-pressure fuel injection pump on the 2.2L SH-VPTS diesel is driven via a camshaft-driven shaft and coupling. Premature wear of the pump drive shaft or its interface with the camshaft drive lobe reduces the pump's ability to generate adequate fuel rail pressure. This logs fault code P0087 (fuel rail or system pressure too low) and can also set P0192 or related rail pressure sensor codes. Symptoms include difficult hot restart, stalling at idle, rough running under moderate load, and reduced power. If left unaddressed, insufficient lubrication and pressure can damage common-rail injectors. Full HPFP and drive shaft replacement is the required fix.

Symptoms to notice

  • Hard or extended cranking required to start when engine is warm
  • Stalling at idle, especially after a hot restart
  • P0087 fuel rail or system pressure too low fault code
  • Rough or lumpy running under moderate throttle load
  • Reduced engine power
  • Possible injector-related secondary fault codes if pressure deficit is prolonged

What to check

  1. Scan ECU for P0087 and related fuel pressure fault codes, including freeze frame data.
  2. Check live fuel rail pressure with diagnostic equipment during cranking and at idle.
  3. Inspect pump drive coupling and camshaft drive area for wear debris.
  4. Review any history of hard starting complaints or fuel system work.

Where to look: High-pressure fuel pump mounted on cylinder head, driven from exhaust camshaft

Parts involved: Fuel rail, High-pressure fuel pump.

Ask the seller

  • “Has any fuel pressure fault code such as P0087 ever been logged?”
  • “Has the vehicle experienced difficulty starting when the engine is already warm?”
  • “Has the high-pressure fuel pump or any fuel system components been replaced?”
  • “Has the vehicle stalled unexpectedly at idle or low speed?”

04Common Rail Injector Copper Seat Seal Blow-By

The SH-VPTS 2.2L common rail diesel injectors are retained by a clamp and sealed to the cylinder head with a single-use soft copper crush washer.diesel2012 onwardEngine
OccasionalEngine $500–$4,500 to fix

Can't confirm for this car

The SH-VPTS 2.2L common rail diesel injectors are retained by a clamp and sealed to the cylinder head with a single-use soft copper crush washer. Repeated heat cycling compresses and hardens these washers over time, allowing combustion gas to bypass the injector seat. Hot pressurised gas tracks carbon deposits up the injector barrel and into the injector bore in the head. In advanced cases, the carbon buildup causes the injector to seize into the head, making removal destructive and requiring cylinder head repair or replacement.

A single common-rail diesel fuel injector photographed against a plain background.Example of the part — not this vehicle

A common-rail diesel injector. Contamination damages the nozzle at the tip.

Panoha · CC BY-SA 3.0 · Wikimedia Commons

Symptoms to notice

  • Diesel knock or metallic ticking audible around the cylinder head on cold start
  • Visible carbon soot streaks radiating from base of one or more injectors
  • Rough idle or single-cylinder misfire that worsens when cold
  • Diesel or exhaust odour from engine bay under the bonnet

What to check

With the engine cold and the intake ducting removed, visually inspect the base of each injector for carbon tracking, black soot streaks, or oily carbon deposits on the cylinder head surface. Remove injector hold-down clamps and inspect for evidence of blow-by residue under the clamp. Service history showing injector copper washers replaced at high mileage is a positive sign. Vehicles over 120,000km without documented injector work are highest risk.

Where to look: Cylinder head, all four injector bores and seat faces

Parts involved: Fuel rail, Fuel injector.

Ask the seller

  • “Have the injector copper seal washers ever been replaced as part of a service?”
  • “Has the vehicle ever had a diesel knock or rough cold-start idle investigated?”
  • “What fuel quality has been used — any low-grade or biodiesel blends?”

05SKYACTIV-D 2.2 Injector Fuel Return Pipe Cracking and Oil Dilution

Remove oil dipstick and check for a rising oil level, thin consistency, or diesel odour.diesel2012–2018Engine
CommonEngine $650–$1,600 to fix

Can't confirm for this car

The plastic fuel leak-off/return pipes connecting the diesel injectors crack or split, allowing diesel fuel to enter the engine oil via the camshaft cover gallery. Oil dilution degrades lubrication rapidly and, if undetected, leads to accelerated bearing wear and potentially catastrophic engine failure. The failure is driven by thermal cycling fatigue of the plastic fittings and pipe material over time.

A single common-rail diesel fuel injector photographed against a plain background.Example of the part — not this vehicle

A common-rail diesel injector. Contamination damages the nozzle at the tip.

Panoha · CC BY-SA 3.0 · Wikimedia Commons

Symptoms to notice

  • Oil level on dipstick rising above maximum between service intervals
  • Strong diesel odour when engine oil cap is removed or dipstick is pulled
  • Thin, pale-coloured oil on dipstick that smears without resistance
  • White or blue-grey smoke from exhaust on startup after the vehicle has sat overnight

What to check

  1. Remove oil dipstick and check for a rising oil level, thin consistency, or diesel odour.
  2. Inspect the injector return pipe assembly visible on top of the camshaft cover for cracks, weeping, or staining.
  3. Check for a low-grade fuel smell in the engine bay with the bonnet open after a cold start.

Parts involved: Fuel injector.

Ask the seller

  • “Has the injector fuel return pipe assembly ever been inspected or replaced?”
  • “Can I see the last oil analysis or dipstick reading — was the level ever found above maximum?”
  • “Has the vehicle ever had a diesel smell inside the cabin or engine bay?”

06SkyActiv-D Variable Geometry Turbocharger Vane Sticking from Soot

The 2.2L SkyActiv-D uses a Mitsubishi-supplied variable geometry turbocharger whose moveable exhaust vanes regulate boost across the rev range.diesel2012–2023Engine
OccasionalEngine $1,500–$4,500 to fix

Can't confirm for this car

The 2.2L SkyActiv-D uses a Mitsubishi-supplied variable geometry turbocharger whose moveable exhaust vanes regulate boost across the rev range; soot and carbon from the high-EGR calibration deposit on the vane pivot mechanism over time, causing the vanes to stick in a fixed position. Vanes stuck in the open position cause chronic underboost and limp mode (P0299), while vanes stuck closed cause overboost and elevated exhaust back-pressure that can accelerate DPF loading. The fault is compounded by neglected EGR systems and infrequent oil changes that increase soot production.

Symptoms to notice

  • P0299 underboost fault code with noticeable lack of power under hard acceleration
  • Engine entering limp mode during brisk acceleration
  • Excessive black or grey smoke from the exhaust under load
  • Surging or inconsistent power delivery at partial throttle
  • Wheeze, whistle, or lack of a clean progressive spool sound from the turbocharger

What to check

During a test drive, accelerate briskly from low revs through the full rev range and verify consistent, smooth boost build without flat-spots or surging. On vehicles with a documented EGR soot history or high mileage, treat the turbocharger VGT mechanism as requiring inspection before purchase. If a workshop inspection is possible: Connect an OBD scanner and check for P0299 (underboost) fault codes.

Where to look: Turbocharger mounted on the exhaust manifold on the firewall side of the engine

Parts involved: Turbocharger.

Ask the seller

  • “Has the turbocharger ever been inspected, cleaned, or replaced?”
  • “Does the vehicle pull strongly and consistently from low revs, or is there hesitation or a flat-spot under acceleration?”
  • “Has the check engine light ever appeared in conjunction with a noticeable loss of power?”

07DPF Clogging from Short Urban Trips (2.2D)

Scan ECU for DPF soot load percentage and stored fault codes.diesel2017 onwardEngineRead the full fault: symptoms, where to look, what to ask the seller

08i-ACTIV AWD Rear Electromagnetic Coupling Degradation

2013 onwardTransmission
OccasionalTransmission $800–$3,500 to fix

Can't confirm for this car

Mazda's i-ACTIV AWD system uses an electronically controlled electromagnetic clutch pack coupling unit at the rear axle to vary torque distribution between front and rear wheels. The coupling relies on proprietary ATF fluid for both clutch pack lubrication and thermal management. Failure to service the coupling fluid at 40,000–50,000km intervals allows fluid degradation and moisture ingress. Degraded fluid causes clutch pack friction material transfer, shudder under low-speed cornering loads, and eventual coupling overheating or seizure that disengages rear drive permanently.

Symptoms to notice

  • Shudder or vibration sensation during slow-speed tight turning manoeuvres
  • AWD system warning light illuminated on the instrument cluster
  • Clicking or grinding sensation from the rear axle area under cornering load
  • Burning smell from the rear of the vehicle after low-speed manoeuvring

What to check

  1. Locate the rear coupling unit filler plug on the coupling housing and check fluid condition — correct fluid is clear to amber and should not be black, metallic, or have a burnt odour.
  2. Scan for AWD-related fault codes such as C1A44 or C1A46.
  3. Conduct a tight low-speed turning road test in a car park and feel for shudder through the drivetrain.
  4. Inspect the coupling unit perimeter for oil weeping around the input/output flange seals.
  5. Ask for coupling fluid change records.

Where to look: Rear coupling unit, located between propshaft and rear differential on AWD variants

Parts involved: Clutch.

Ask the seller

  • “Has the AWD coupling fluid ever been changed, and if so, at what mileage?”
  • “Has any AWD warning light or message appeared on the dashboard?”
  • “Has the vehicle been used for towing or driven off sealed surfaces?”

09SkyActiv-D EGR Cooler Cracking

Check for white chalky deposits inside the EGR valve bore.diesel2012 onwardEngine
OccasionalEngine $1,200–$3,500 to fix

Can't confirm for this car

The SkyActiv-D diesel EGR cooler housing cracks from repeated thermal cycling allowing coolant to enter the intake and EGR system. Coolant in the intake manifold produces white chalky deposits and eventual coolant ingestion.

Symptoms to notice

  • White smoke from exhaust on startup and white chalky deposits in the EGR bore
  • Coolant level dropping without a visible external leak

What to check

Check for white chalky deposits inside the EGR valve bore. Perform a combustion gas test on the coolant. White smoke on startup in a warm climate is characteristic.

Where to look: EGR cooler on diesel intake system

Parts involved: EGR valve.

Ask the seller

  • “Has the skyactiv-d egr cooler cracking been inspected or repaired?”

10SkyActiv-D Injector Soot Deposit Build-Up

Perform an injector return-flow (back-leak) test to identify injectors with excessive leakage.diesel2012–2017EngineRead the full fault: symptoms, where to look, what to ask the seller

11SKYACTIV-D DPF Blockage from Urban-Cycle Regeneration Failure

Look for an illuminated DPF warning light or amber engine management light on the instrument cluster.diesel2012 onwardEngine
CommonEngine $400–$3,200 to fix

Can't confirm for this car

The diesel particulate filter requires sustained high exhaust temperature to complete passive or active regeneration. Short urban trips do not allow exhaust temperatures to reach the threshold (typically above 550°C for passive, higher for active) needed to oxidise accumulated soot. When soot loading exceeds the ECU threshold and an active regeneration is repeatedly aborted by engine shutdown, the DPF becomes critically blocked, triggering limp mode and requiring professional forced regeneration or filter replacement.

Symptoms to notice

  • Amber DPF warning light illuminated on the dashboard, sometimes cycling on and off
  • Noticeable loss of power and restricted throttle response (limp mode) during DPF blockage events
  • Increased fuel consumption as the ECU attempts repeated active regeneration cycles
  • Excessive white or acrid smoke from exhaust during a forced active regeneration

What to check

  1. Look for an illuminated DPF warning light or amber engine management light on the instrument cluster.
  2. Ask the seller about typical trip length — predominantly urban/short trips indicate high risk.
  3. If a workshop inspection is possible: Using an OBD-II scanner with live data, check DPF soot load percentage and differential pressure across the filter.

Parts involved: Diesel particulate filter.

Ask the seller

  • “What is the typical daily driving distance, and does it include sustained motorway driving?”
  • “Has the DPF warning light ever illuminated, and was a forced regeneration carried out?”
  • “Has the DPF ever been chemically cleaned or replaced?”

12Excessive Oil Consumption (2.5T PY-VPTS Turbo)

Check oil level against documented service history and calculate consumption rate.petrol2019–2021Engine
OccasionalEngine $1,400–$3,200 to fix

Can't confirm for this car

The turbocharged 2.5L PY-VPTS fitted to the CX-5 Turbo variant has shown documented oil consumption in excess of acceptable limits, attributed primarily to degradation or insufficient sealing of intake valve stem seals. Worn seals allow oil vapour to pass from the valve guides into the combustion chamber. Combined with elevated crankcase pressures from the turbocharger, consumption can reach or exceed one litre per 5,000 km. Blue exhaust smoke on cold start, oil-fouled spark plugs, and gradual reduction in oil level between services are the primary indicators. Valve stem seal replacement requires cylinder head removal.

Symptoms to notice

  • Blue or grey smoke on cold start or after prolonged idle
  • Oil level noticeably dropping between standard service intervals
  • Oil-fouled or oil-wet spark plugs on inspection
  • Slight oil residue around intake manifold or PCV hose connections
  • Oil consumption exceeding 1 litre per 5,000 km

What to check

  1. Check oil level against documented service history and calculate consumption rate.
  2. Inspect spark plugs for oil contamination.
  3. Cold-start observation for blue exhaust smoke.
  4. Check PCV system and breather hoses for oil residue.
  5. Ask for Mazda dealer oil consumption test records if available.

Where to look: Cylinder head, intake valve stem seals; PCV system routed from cam cover

Parts involved: Turbocharger.

Ask the seller

  • “How often is the oil level checked between services?”
  • “Has blue or grey smoke been noticed on cold start?”
  • “Has oil consumption been raised with Mazda dealer under warranty?”
  • “Has the vehicle had a formal oil consumption test?”

13SKYACTIV-D Swirl Flap Carbon Soot Restriction

Watch for: EML illuminated with P2004 or P2005 stored codes.diesel2017 onwardEngineRead the full fault: symptoms, where to look, what to ask the seller

14Torque Converter Shudder (SkyActiv-Drive AW6A-EL)

Test drive at light throttle between 40-80 km/h on a flat road and note any vibration through the drivetrain.2017 onwardTransmissionRead the full fault: symptoms, where to look, what to ask the seller

15SkyActiv-G 2.5 Timing Chain Tensioner Wear

Cold-start the engine and listen for a metallic rattle from the front or top of the engine block.petrol2013–2017Engine
OccasionalEngine $900–$2,200 to fix

Can't confirm for this car

The 2.5-litre SkyActiv-G petrol engine (PY-VPS) in KE CX-5s can develop timing chain tensioner wear at higher mileages, particularly where oil-change intervals have been extended beyond specification. A worn tensioner allows chain slack, producing a characteristic metallic rattle on cold start that typically clears once oil pressure builds within a few seconds. Left unaddressed the slack chain can jump a tooth, causing valve timing errors and potential valve-to-piston contact damage.

The front of a dual overhead camshaft engine with the timing cover removed, exposing the timing chain and sprockets.Example of the part — not this vehicle

The front of a twin-cam engine with the timing cover off — chain, sprockets and guides.

Logansenf · CC BY-SA 4.0 · Wikimedia Commons

Symptoms to notice

  • Metallic rattling noise from front of engine on cold start, clearing within 5-15 seconds
  • Check engine light with camshaft or crankshaft position timing codes P0016 or P0017
  • Rough running or hesitation immediately after cold start before rattle clears
  • Elevated oil consumption on affected units with worn tensioners

What to check

Cold-start the engine and listen for a metallic rattle from the front or top of the engine block. The rattle should disappear within seconds as oil pressure builds — if it persists beyond 10 seconds, the tensioner is likely worn. Review service history closely for oil change adherence, as extended intervals are the primary driver of early tensioner wear. Scan for stored P0016 or P0017 fault codes.

Where to look: Front of engine, timing chain cover and tensioner area

Parts involved: Timing chain.

Ask the seller

  • “Has the car ever made a rattling or clattering noise immediately after cold start?”
  • “Can you show the full service history and oil change records?”
  • “Has the timing chain, tensioner, or guides ever been inspected or replaced?”

16SkyActiv-D EGR System and Intake Shutter Valve Soot Accumulation (Recall REC-000894)

Verify recall REC-000894 completion status against the VIN at vehiclerecalls.gov.au before buying.diesel2012–2018EngineRead the full fault: symptoms, where to look, what to ask the seller

17SKYACTIV-G Intake Valve Carbon Deposits

Watch for: Rough idle particularly when cold.petrol2012 onwardEngineRead the full fault: symptoms, where to look, what to ask the seller
Electrical3

01Engine Wiring Harness Heat Insulation Degradation near Turbo

With the engine cool, trace the engine wiring harness from the injector rail connectors toward the turbocharger and exhaust manifold.diesel2012–2017Electrical
OccasionalElectrical $400–$2,000 to fix

Can't confirm for this car

On the KE-generation CX-5 SH-VPTS 2.2L diesel, sections of the engine wiring harness are factory-routed in close proximity to the turbocharger housing and exhaust manifold. Prolonged radiant heat exposure causes the wiring insulation to soften, crack, and in some cases melt where the loom contacts or runs close to the turbo body. Affected circuits typically include the injector control wiring, boost pressure sensor wiring, and common rail pressure sensor connections. Cracked insulation produces intermittent short circuits that generate inconsistent fault codes that are difficult to reproduce and diagnose.

Symptoms to notice

  • Random or intermittent engine warning light that clears on restart
  • Injector misfire or cylinder contribution fault codes that do not correlate to a single injector
  • Boost pressure sensor codes P0237 or P0238 with no failed sensor found on test
  • Rough running that cannot be replicated consistently for diagnostic purposes

What to check

  1. With the engine cool, trace the engine wiring harness from the injector rail connectors toward the turbocharger and exhaust manifold.
  2. Inspect the entire length of loom conduit and any exposed wiring for discoloured, cracked, or melted insulation.
  3. Look for areas where the loom contacts metal components, especially near the turbo body.
  4. Check that all OEM heat shielding around the turbocharger and exhaust is present and not displaced or missing.
  5. Inspect injector and sensor connector pin faces for corrosion or heat-induced oxidation.

Where to look: Engine bay, wiring harness sections routed adjacent to turbocharger and exhaust manifold

Parts involved: Turbocharger.

Ask the seller

  • “Have any random or intermittent engine warning lights appeared that couldn't be diagnosed?”
  • “Has the vehicle had unexplained injector or boost sensor fault codes that recurred after clearing?”
  • “Has the OEM heat shielding around the turbocharger been removed or modified?”

02Electric Power Steering Rack Rattle at Low Speed

Drive slowly over a speed hump or rough surface and listen for a metallic rattle or clunk localised to the steering rack area.2017 onwardElectrical
CommonElectrical $350–$3,500 to fix

Can't confirm for this car

The KF CX-5 uses a rack-and-pinion electric power steering system with the motor mounted directly on the rack. A documented noise issue affects this generation, manifesting as a rattle or clunk from the steering rack assembly when driving slowly over uneven surfaces or manoeuvring at low speed. The most commonly identified cause is wear or looseness in the inner tie rod ends where they connect to the rack, combined with the rack's mounting bushings losing their damping compliance over time. On some vehicles the rack housing or the EPS motor mounting develops the rattle independently. While the fault is generally not immediately dangerous, it can progress to increased steering play and imprecision if the inner tie rod ends are worn, and a replacement rack is expensive.

Symptoms to notice

  • Metallic rattle or clunk from the steering rack area when driving at low speed over rough or uneven surfaces
  • Noise reproducible by rocking the steering wheel slightly at idle with the vehicle stationary
  • Rattle is most pronounced during parking manoeuvres or when the wheel is near full lock at low speed
  • No loss of steering assistance or control in early stages, but potential for increased steering play if tie rod ends are worn

What to check

Drive slowly over a speed hump or rough surface and listen for a metallic rattle or clunk localised to the steering rack area. With the engine running at idle, rock the steering wheel back and forth through a small range to replicate the noise without road input. Inspect rack mounting bushings for deterioration. If a workshop inspection is possible: On a hoist, check the inner tie rod ends for axial and lateral play by attempting to move them at the rack connection point.

Where to look: Steering rack mounted transversely beneath the engine bay, connected to the steering column above and to the front hub carriers via tie rods on each side

Parts involved: Steering rack.

Ask the seller

  • “Is there any rattling or clunking noise from around the steering area when going over speed bumps slowly?”
  • “Has the power steering rack or tie rods been inspected or replaced?”
  • “Does the steering feel precise and free of play on centre?”

03MZD Connect CMU Infotainment System Freeze and Black Screen Lockup

During the test drive, observe the infotainment screen for delayed boot, intermittent freezing, or unresponsive touch inputs.2012–2020Electrical
Very commonElectrical $0–$2,200 to fix

Can't confirm for this car

The Car Multimedia Unit (CMU) running Mazda's MZD Connect platform on KE and early KF models runs an embedded Linux stack that is susceptible to software lockup under certain conditions — particularly during Bluetooth device handshaking, SD card access, and touchscreen input during system boot. The system freezes with a black or static screen, becomes completely unresponsive, and does not recover without a hardware reset. In some cases the CMU enters a persistent boot loop requiring software reflash. The fault is more pronounced in vehicles that have not received CMU firmware updates.

Symptoms to notice

  • Infotainment screen going black mid-drive with no response to touch or physical button inputs
  • System boot loop on startup where the Mazda logo appears repeatedly without reaching the home screen
  • Loss of backup camera, climate display, and audio control requiring a battery disconnect to reset
  • Apple CarPlay or Android Auto connection dropping mid-journey and failing to reconnect without system restart

What to check

During the test drive, observe the infotainment screen for delayed boot, intermittent freezing, or unresponsive touch inputs. Attempt to pair a Bluetooth device and navigate through multiple menus simultaneously. Check that the system has the latest CMU firmware by inspecting the software version in Settings — earlier firmware versions are significantly more prone to lockup.

Ask the seller

  • “Has the MZD Connect system ever gone black or become unresponsive while driving?”
  • “Has the CMU firmware ever been updated at a Mazda dealer?”
  • “Does the backup camera display reliably every time reverse is selected?”
Body, brakes, suspension & interior15

01Brake Caliper Guide Pin Corrosion and Seizure

Inspect rubber boots for splits, tears, or missing sections.2012–2017Brakes
CommonBrakes $150–$1,100 to fix

Can't confirm for this car

The sliding-pin brake calipers fitted to both the front and rear axles of the KE CX-5 rely on two steel guide pins per caliper to allow the caliper body to slide laterally as pads wear. The rubber boots that seal these pins deteriorate with age and road grime exposure, allowing moisture to penetrate and corrode the pin surface. A seized guide pin prevents the caliper from retracting fully after braking, causing continuous pad-to-disc contact, severe uneven pad wear, brake drag, and rotor overheating. In NZ coastal environments this failure occurs at relatively low mileage.

Symptoms to notice

  • Significantly uneven brake pad wear with the inner pad worn to metal while the outer pad retains material, or vice versa
  • Brake drag causing the vehicle to pull to one side under moderate braking
  • Excessive brake dust accumulation on one wheel compared to the opposite side
  • Burning smell from a wheel after normal driving, indicating continuous rotor contact and heat build-up

What to check

  1. Inspect rubber boots for splits, tears, or missing sections.
  2. Compare inner and outer brake pad thickness on each corner — a difference of more than 3 mm indicates a sticky caliper.
  3. Check disc surface for uneven wear grooves or blueing from heat on the side corresponding to the stuck pin.
  4. If a workshop inspection is possible: Remove each caliper and extract the guide pins; they must slide smoothly by hand throughout their full travel.

Where to look: Front and rear brake calipers on both sides; guide pins are located within the caliper bracket slides

Parts involved: Brake disc and pads, Body corrosion.

Ask the seller

  • “When were the brakes last inspected and serviced?”
  • “Are there any pulling or dragging sensations under braking?”
  • “Have the guide pins been cleaned and regreased at any recent service?”

02Rear Subframe Cross Member Corrosion

Watch for: Surface rust visible at rear subframe mounting area on underbody inspection.2017 onwardBody & Rust
OccasionalBody & Rust $600–$4,500 to fix

Can't confirm for this car

The rear cross member and subframe mounting point areas on KF CX-5 vehicles are susceptible to accelerated corrosion at the welded joint between the subframe mounting brackets and the rear underbody cross member. Moisture and road contamination trap at the lap welds and spot-weld flanges, initiating rust that progresses inward from the outer surface. In severe cases the corrosion undermines structural integrity at the subframe mounting points, affecting rear suspension geometry under load. Vehicles operated in high-salt coastal environments in New Zealand or those subjected to winter road salt are disproportionately affected. The corrosion is often hidden under underseal or factory wax injection and requires prodding to locate active pitting.

Symptoms to notice

  • Surface rust visible at rear subframe mounting area on underbody inspection
  • Bubbling or blistering of factory underseal around rear cross member flanges
  • Rear suspension clunk or knock over rough surfaces
  • Rear wheel alignment outside specification without accident history
  • Visible active rust pitting at subframe bracket weld points

What to check

Watch for: Surface rust visible at rear subframe mounting area on underbody inspection. If a workshop inspection is possible: Place vehicle on a hoist and inspect the rear subframe mounting brackets and cross member welds with a torch and screwdriver; probe any blistered underseal to check for underlying metal loss; check inner faces of mounting flanges for rust scaling; confirm subframe bolts can be torqued to specification without thread strip — severe corrosion causes thread pull-out; verify rear wheel alignment is within spec.

Where to look: Rear underbody cross member, subframe mounting bracket weld points, both sides

Parts involved: Body corrosion.

Ask the seller

  • “Has the vehicle operated in a coastal or high-salt environment?”
  • “Has any underbody rust treatment or re-underseal been applied?”
  • “Any rear suspension noises or rear alignment issues in service history?”

03KE Generation Front Subframe Corrosion from Factory Paint Failure

Focus on the inboard faces of the subframe rails and the area around the front lower control arm mounting points.2012–2017Body & Rust
CommonBody & Rust $500–$2,500 to fix

Can't confirm for this car

The KE CX-5 (2012–2017) front subframe and associated engine cradle components received inadequate factory paint coverage on lower and inner faces. Road moisture, brake dust, and road salt penetrate the thin paint layer and cause accelerated structural corrosion. In New Zealand's wet conditions and coastal locations, significant subframe surface rust can develop within six to eight years of the vehicle's manufacture. While structural failure is rare, heavy corrosion complicates suspension and engine mount servicing and can trigger WoF failures.

Symptoms to notice

  • Visible orange surface rust and paint delamination on the lower and inner faces of the front subframe visible from beneath the vehicle
  • Scaling or flaking paint on the subframe cradle rails when inspected with a torch on a hoist
  • Corrosion-related difficulty removing lower control arm bolts or engine mount hardware during servicing
  • WoF inspection advisory or failure note citing underbody corrosion in the front suspension area

What to check

Focus on the inboard faces of the subframe rails and the area around the front lower control arm mounting points. Probe any suspect areas with a blunt instrument — soft metal indicates advanced corrosion. Any WoF history showing a corrosion advisory on underside should be treated seriously. If a workshop inspection is possible: With the vehicle on a hoist, inspect the forward and lower faces of the front subframe cradle for orange surface rust, paint delamination, or scaling.

Parts involved: Chassis and structural rust, Body corrosion.

Ask the seller

  • “Has the vehicle ever been inspected by a hoist-equipped workshop for underside corrosion?”
  • “Has the WoF ever noted any corrosion advisory or failure on the front subframe?”
  • “Has the vehicle been used or stored near the coast or in a high-rainfall area?”

04Rear Multi-Link Suspension Bush Collapse

Inspect for oil contamination on bush surfaces, which rapidly degrades rubber compound.2012–2017Suspension
CommonSuspension $700–$2,200 to fix

Can't confirm for this car

The KE CX-5 rear suspension is a multi-link design with separate trailing arms, lateral links, and a toe-control link, each located by rubber-bonded steel bushes. These bushes degrade through age, UV exposure, and contamination, causing the rubber compound to crack, delaminate, or separate from the steel inserts. Bush failure introduces unwanted compliance into the rear geometry, allowing toe and camber to change dynamically under cornering and braking loads, which manifests as rear-end instability and accelerated tyre wear.

Symptoms to notice

  • Rear-end wander or instability when driving at motorway speeds
  • Uneven or diagonal wear pattern across the rear tyre tread
  • Clunking or thudding from the rear axle area when driving over rough or unsealed roads
  • Rear wheel alignment repeatedly going out of specification between services

What to check

  1. Inspect for oil contamination on bush surfaces, which rapidly degrades rubber compound.
  2. Measure rear wheel camber and toe against Mazda specifications — values outside tolerance often indicate collapsed bushes even when the damage is not yet visible.
  3. If a workshop inspection is possible: With the vehicle on a hoist, use a pry bar to lever each rear suspension arm and check for excessive rubber bush deflection or visible cracking.

Where to look: Rear axle assembly: trailing arm inner and outer bushes, lateral link bushes, and toe-link inner bush

Ask the seller

  • “Has the vehicle had a four-wheel alignment check recently, and were the rear values within specification?”
  • “Have you noticed any rear instability at highway speeds?”
  • “Have the rear suspension bushes ever been inspected or replaced?”

05Rear Multi-Link Suspension Bush Deterioration

Then check at 6 and 12 o'clock for fore-aft play.2017 onwardSuspension
OccasionalSuspension $600–$1,800 to fix

Can't confirm for this car

The KF CX-5 uses a multi-link independent rear suspension with multiple rubber compliance bushings on the trailing arms, upper and lower lateral links, and toe control links. These bushings are designed to isolate road noise and allow controlled compliance during suspension travel, but the rubber compounds deteriorate over time through UV exposure, ozone attack, and cyclical loading — a process accelerated in New Zealand's humid, UV-intense climate. As bushings crack, split, or extrude from their housings, rear wheel alignment geometry becomes unstable, particularly toe angle under cornering loads. The result is rear-end instability at motorway speeds and a progressive loss of the predictable handling balance the KF is engineered to provide. Collapsed bushings also allow increased lateral play, which can cause audible clunking over rough surfaces.

Symptoms to notice

  • Rear-end instability or wander at motorway speeds, requiring constant small steering corrections
  • Audible clunking from the rear suspension when traversing speed humps or sharp road imperfections
  • Rear wheel alignment persistently out of specification, particularly toe, despite recent alignment adjustment
  • Increased tyre wear on the rear axle, often showing uneven edge wear

What to check

Then check at 6 and 12 o'clock for fore-aft play. Visually inspect all visible rubber bushings on the trailing arms and lateral links for cracking, splitting, or rubber extruding from the metal sleeve. A rear wheel alignment report showing toe values outside specification is a reliable indicator of bush collapse. If a workshop inspection is possible: On a hoist, grasp each rear wheel at 9 and 3 o'clock positions and push and pull laterally to check for play.

Where to look: Rear multi-link suspension assembly, trailing arms and lateral links on each side of the rear axle, accessible from underneath the vehicle

Ask the seller

  • “Has the rear suspension ever had any bushes or links replaced?”
  • “Does the car feel stable and planted at motorway speeds, or is there any wander?”
  • “Has a recent wheel alignment shown the rear wheels in specification?”
  • “Has the car been used on rough or unpaved roads?”

06Electric Parking Brake Actuator Motor Failure

Check the EPB warning light status — an amber EPB light on the dashboard indicates a stored fault code.2017 onwardBrakes
OccasionalBrakes $600–$1,700 to fix

Can't confirm for this car

KF generation CX-5 models equipped with the electric parking brake (EPB) use an electric actuator motor mounted directly on each rear caliper to apply and release the parking brake. The actuator motor assembly is exposed to road contamination and moisture and is prone to internal corrosion and motor winding failure. A failed actuator cannot apply or release the parking brake on demand. In release failure mode the vehicle is effectively immobilised. In apply failure mode the EPB cannot secure the vehicle on a gradient. The failure typically presents with an EPB warning light before complete actuator loss.

Symptoms to notice

  • Amber EPB warning light illuminated on the instrument cluster, sometimes accompanied by an audible warning chime
  • Electric parking brake failing to apply or release on demand, or applying unevenly between left and right rear
  • Grinding or clicking noise from one rear corner when the EPB button is pressed
  • Vehicle management system preventing gearshift from Park due to EPB fault detection

What to check

Check the EPB warning light status — an amber EPB light on the dashboard indicates a stored fault code. Physically apply and release the EPB multiple times and listen for smooth motor operation — grinding, clicking, or no response from one rear corner indicates actuator failure. Inspect both rear caliper-mounted actuators for corrosion or damage. If a workshop inspection is possible: With an OBD-II scanner capable of reading brake system modules, check for EPB actuator fault codes.

Parts involved: Body corrosion, Brake disc and pads.

Ask the seller

  • “Has the electric parking brake warning light ever illuminated?”
  • “Has either rear EPB actuator ever been inspected or replaced?”
  • “Does the parking brake apply and release smoothly with a single press, or is there any noise or hesitation?”

07Rear Brake Disc Surface Corrosion and Pad Seizure

Inspect rear disc faces for deep circumferential scoring, uneven wear lip, or patches of pad material bonded to the disc surface.2012 onwardBrakes
CommonBrakes $500–$1,400 to fix

Can't confirm for this car

CX-5 rear brake discs develop aggressive surface rust rapidly when the vehicle is parked for extended periods, particularly in wet or coastal conditions common in New Zealand and coastal Australia. The corroded disc surface bonds to the brake pad friction material, causing the pad to seize to the disc. When the vehicle moves, the seized pad tears chunks of pad material or scores the disc surface deeply. In severe cases the rear caliper piston is forced back by the seized assembly and fails to retract correctly.

Symptoms to notice

  • Harsh grinding or tearing sound from the rear during the first application of brakes after the vehicle has been parked overnight
  • Vehicle pulling noticeably to one side under moderate braking, indicating unequal rear brake application
  • Visible deep scoring or gouging on rear disc faces visible through the wheel spokes
  • Rapid rear pad consumption compared to front pads over the same service interval

What to check

  1. Inspect rear disc faces for deep circumferential scoring, uneven wear lip, or patches of pad material bonded to the disc surface.
  2. Check rear caliper slide pins for free movement — seized pins cause uneven pad contact and accelerate the bonding problem.
  3. Compare pad thickness left vs right on each axle for uneven wear indicating a sticking caliper or seized pad.

Parts involved: Brake disc and pads, Body corrosion.

Ask the seller

  • “When were the rear brake pads and discs last replaced, and what was the reason?”
  • “Has the vehicle ever shown brake pulling or uneven braking?”
  • “Does the vehicle sit unused for extended periods?”

08Rear Brake Caliper Adjuster Screw and Slide Pin Seizure

Compare remaining brake pad thickness side-to-side; asymmetric wear exceeding 3mm indicates a stuck caliper.2012 onwardBrakesRead the full fault: symptoms, where to look, what to ask the seller

09Front Lower Control Arm Rear Bush Wear

Watch for: Steering wander or drift on straight roads.2012–2017Suspension
CommonSuspension $450–$1,100 to fix

Can't confirm for this car

The rear bush of the front lower control arm on the KE CX-5 is a hydraulic-filled compliance bush that deteriorates through cracking and fluid loss. As the bush breaks down, the control arm rear pivot point loses axial stiffness, allowing the arm to move fore and aft under braking and acceleration loads. This introduces caster and toe variation at the front wheels, manifesting as steering wander on straight roads, vague on-centre feel, and a tendency for the car to follow road camber or rutting. The failure is accelerated on rough sealed roads and by vehicles used for regular towing. Worn bushes are often visible as cracked rubber or collapsed bush sleeve on inspection, and confirmed by clunk under brake application.

Symptoms to notice

  • Steering wander or drift on straight roads
  • Vague or imprecise on-centre steering feel
  • Car follows ruts or road camber without steering input
  • Clunk from front suspension under braking
  • Uneven or accelerated front tyre wear
  • Wheel alignment that cannot be corrected to specification

What to check

Watch for: Steering wander or drift on straight roads. If a workshop inspection is possible: With vehicle on a hoist apply fore and aft force to the front lower control arm to check for excessive bush deflection at the rear pivot; visually inspect bush rubber for cracking, splitting, or collapsed hydraulic chambers; check for differential tyre wear front axle indicating caster wander; attempt wheel alignment — inability to achieve caster specification confirms bush failure.

Where to look: Front lower control arm, rear bush pivot point, both sides

Ask the seller

  • “Has the front lower control arm rear bush ever been replaced?”
  • “Any complaints of steering wander or pulling at highway speed?”
  • “When was the last four-wheel alignment performed and did it pass?”

10Front Lower Control Arm Ball Joint Wear

Visually inspect the ball joint dust boot for cracking, tearing, or grease expulsion.2017 onwardSuspension
OccasionalSuspension $450–$1,100 to fix

Can't confirm for this car

The KF CX-5 front suspension uses MacPherson struts with a lower control arm that incorporates a sealed ball joint at its outer end, connecting the arm to the wheel hub carrier. The ball joint is a wear item subject to loading from both braking and cornering forces, and the sealed design means it cannot be re-greased in service. Premature wear has been documented on KF-generation vehicles, particularly in markets with rough roads or where the vehicle carries heavy loads regularly. Worn ball joints introduce lateral and axial play at the hub, which manifests as handling vagueness, clunking over bumps, and accelerated tyre wear. In New Zealand conditions, the combination of unsealed road ingress and UV-degraded dust boots accelerates joint deterioration. A failed ball joint is a WOF refusal item.

The front wheel of a car splayed outward with the lower control arm hanging down after a ball joint separation.Example of the part — not this vehicle

A separated lower ball joint: the control arm has dropped and the wheel has splayed out under the guard.

Elfix · CC0 · Wikimedia Commons

Symptoms to notice

  • Single clunk or knock from the front suspension when traversing bumps, speed humps, or rough surfaces
  • Vague or imprecise steering feel with the vehicle wandering slightly under straight-line driving
  • Uneven tyre wear on the front axle, typically feathering on one side of the tread
  • Subtle vibration felt through the steering wheel over broken road surfaces

What to check

Visually inspect the ball joint dust boot for cracking, tearing, or grease expulsion. Drive the vehicle over a speed bump at low speed and listen for a single clunk from either front corner. Check tyre wear for feathering on the inner or outer edge. If a workshop inspection is possible: With the vehicle on a hoist, grasp the front wheel at the 6 and 12 o'clock positions and rock it vertically — any detectable play indicates ball joint wear.

Where to look: Outer end of front lower control arm, one per side, where the arm connects to the base of the front wheel hub carrier

Parts involved: Ball joint.

Ask the seller

  • “Has the front suspension been inspected or had any components replaced?”
  • “Is there any clunking from the front end over bumps?”
  • “When was the last wheel alignment performed?”
  • “Has the car been used on gravel or unsealed roads regularly?”

11Front Wheel Bearing Failure

Grip the wheel at 3 and 9 o'clock and check for any lateral play.2017 onwardSuspension
OccasionalSuspension $400–$800 to fix

Can't confirm for this car

KF-generation CX-5s have developed a documented pattern of front wheel bearing failures, particularly on higher-mileage examples and AWD variants. The hub-integrated bearing assemblies require full hub unit replacement at most workshops rather than a press-in bearing service alone, raising the cost compared to older designs. AWD torque loading and NZ/AU road surfaces are cited as contributing factors in workshop reports.

Symptoms to notice

  • Low humming or growling noise from the front that increases with vehicle speed
  • Noise pitch changes or worsens when cornering in one direction as load transfers to the opposite bearing
  • Vibration felt through the steering wheel at highway speeds
  • Roughness or grinding felt when spinning the wheel by hand on a hoist

What to check

Grip the wheel at 3 and 9 o'clock and check for any lateral play. During the test drive at highway speed, listen for a speed-proportional hum from the front that changes pitch when weaving gently left and right — a bearing failing on one side will load and unload with each direction change. If a workshop inspection is possible: On a hoist, spin each front wheel by hand and feel for roughness, catching, or grinding.

Where to look: Front hub assembly, integrated wheel bearing, one each side

Parts involved: Wheel bearing.

Ask the seller

  • “Have you noticed any humming or droning noise from the front at highway speeds?”
  • “Has a wheel bearing been replaced on this vehicle?”
  • “Is the vehicle AWD, and has it been used for towing or off-road driving?”

12Brake Caliper Guide Pin Seizure

2017 onwardBrakes
CommonBrakes $180–$700 to fix

Can't confirm for this car

The KF CX-5 uses conventional sliding-type brake calipers on all four corners, each of which rides on two hardened steel guide pins that allow the caliper to float and maintain equal pad pressure on both faces of the rotor. The guide pins are protected by rubber boots and rely on grease for lubrication; when the boots crack or tear — a common occurrence in New Zealand's wet climate and UV environment — moisture ingress causes the pins to corrode and seize within their bores. A seized guide pin prevents one side of the caliper from retracting fully, keeping a brake pad in constant light contact with the rotor. This causes accelerated and uneven pad and rotor wear, heat build-up in the affected corner, pulling under braking, and eventual pad glazing or rotor warping. If left unaddressed, a fully seized caliper can result in a dangerous reduction in braking performance.

Symptoms to notice

  • Vehicle pulling to one side under braking, consistently toward the side with the seized caliper
  • Brake pads wearing significantly faster on one side of an axle compared to the other
  • Burning smell or heat felt from one wheel after normal driving
  • Increased stopping distances and pedal feel changes as pad friction material glazes from constant contact

What to check

  1. Inspect brake pad thickness at all four corners — if one side of an axle is significantly thinner than the other, caliper seizure is the primary suspect.
  2. Check that rotors are not scored, blued from heat, or have a pronounced wear lip on the unswept inner edge.
  3. Check all four rubber guide pin boots for cracking or missing boots that have allowed water in.
  4. If a workshop inspection is possible: On a hoist, manually attempt to slide the caliper on its guide pins: a seized pin will prevent movement.

Where to look: Front and rear brake calipers, guide pin bores on the caliper mounting bracket at each wheel corner — front calipers are the higher-load items most commonly affected

Parts involved: Brake disc and pads.

Ask the seller

  • “When were the brake pads and rotors last replaced, and on which axle?”
  • “Does the car pull to one side when braking?”
  • “Have all four brake calipers been inspected and had their guide pins serviced?”
  • “Is there any smell of burning from any wheel after driving?”

13Tailgate gas strut end cap can corrode and burst recall (KE CX-5, 2012-2017)

Ask for the tailgate strut recall paperwork and check the VIN with a Mazda dealer.2012–2017Body & Rust
OccasionalBody & Rust $0–$300 to fix

Can't confirm for this car

Every KE CX-5 (2012-2017, petrol and diesel) was recalled because the paint on the tailgate gas strut end caps was not suited to salted roads and coastal air. The end cap can corrode, swell and split, and the pressurised strut can break apart and injure someone near the tailgate. Mazda Australia recall PRA 2016/15630 (REC-000872) replaces the struts for free.

Symptoms to notice

  • Rust on the metal ends of the tailgate struts
  • Tailgate will not stay up

What to check

  1. Ask for the tailgate strut recall paperwork and check the VIN with a Mazda dealer.
  2. Open the tailgate and look at both gas struts: rust, swelling or splits on the metal end caps are a warning sign, and the tailgate should stay up on its own.
  3. If a workshop inspection is possible: the fitted struts can be checked against the recall replacement part numbers.

Where to look: Tailgate gas struts

Parts involved: Shock absorber / strut.

Ask the seller

  • “Has the tailgate strut recall been done?”

14Electric Power Steering Rack Rattle and Knock

The KE CX-5 uses a rack-and-pinion electric power steering unit with an electric motor mounted directly on the rack.2012–2016Suspension
CommonSuspension $200–$3,200 to fix

Can't confirm for this car

The KE CX-5 uses a rack-and-pinion electric power steering unit with an electric motor mounted directly on the rack. Internal wear between the rack teeth and pinion, or deterioration of the rack support yoke preload spring, allows the rack bar to develop small amounts of radial play. This manifests as a knock or rattle transmitted through the steering wheel, particularly over uneven surfaces. Mazda acknowledged this failure mode and issued updated yoke spring and adjuster plug specifications, though worn racks beyond this adjustment range require full rack replacement.

Symptoms to notice

  • Knocking or rattling noise from the steering rack area when the front wheels pass over road imperfections
  • A noticeable dead-zone or vague feeling when the steering wheel is near the straight-ahead position
  • Noise intensity increasing in cold ambient temperatures due to reduced lubricant viscosity inside the rack
  • Steering wheel vibration or shimmy transmitted back from the rack under braking

What to check

  1. With the engine running and wheels pointing straight ahead, firmly push and pull the steering wheel sideways while a second person observes the rack for movement at the mounting bushes and at the rack bar itself.
  2. Rock the steering wheel slightly at centre to feel for dead-spot play.
  3. Check rack mounting bush condition.
  4. Verify for any relevant Mazda TSB updates on yoke adjuster specification.

Where to look: Steering rack mounted on the front subframe, directly behind the front axle line

Parts involved: Steering rack.

Ask the seller

  • “Does the steering produce any knocking or rattling noises over bumps?”
  • “Does the steering feel vague or have a dead zone around the straight-ahead position?”
  • “Has the steering rack ever been adjusted or replaced under warranty or since?”

15Rear Trailing Arm and Subframe Bush Deterioration

During the test drive, note any vagueness or floating sensation when changing lanes at motorway speed.2012–2023Suspension
CommonSuspension $450–$1,000 to fix

Can't confirm for this car

The CX-5 rear multi-link suspension uses rubber-bonded bushes in the trailing arms and rear subframe mounts to maintain rear wheel alignment and absorb road inputs; these bushes degrade progressively with age, UV exposure, and NZ/AU road conditions. Worn bushes allow excess wheel movement that changes toe and camber alignment dynamically, causing vagueness at motorway speeds, uneven rear tyre wear, and clunking over road imperfections. The deterioration is more pronounced on higher-mileage KE-generation vehicles (2012–2017) that have never had a rear suspension inspection.

Symptoms to notice

  • Vague or wandering steering feel at motorway speed, requiring constant small corrections
  • Clunking or knocking from the rear suspension over road bumps or dips
  • Uneven rear tyre wear — feathering on the inner or outer edge
  • Vehicle pulling to one side under braking
  • Visible cracking, splitting, or deformation of bush outer rubber on inspection

What to check

During the test drive, note any vagueness or floating sensation when changing lanes at motorway speed. Inspect rear tyre wear for feathering on the inner or outer edge, which indicates dynamic toe change from worn bushes. If a workshop inspection is possible: Place the vehicle on a hoist and use a pry bar to check for excess deflection at each trailing arm bush mount and rear subframe mounting point.

Where to look: Rear trailing arm pivot bushes, rear subframe-to-body mounting bushes, and lateral link bushes — all underfloor at the rear axle

Ask the seller

  • “Has the rear suspension ever been inspected, and have any trailing arm or subframe bushes been replaced?”
  • “Does the vehicle feel stable and planted on the motorway, or is there a vague or floating sensation?”
  • “Is rear tyre wear even across the full tread width on both rear tyres?”
Fluid leaks1

01AWD Rear Differential Input Shaft Oil Seal Leak

Check the area immediately behind the rear differential for oil residue on the floor or on the propshaft.2012 onwardFluid Leaks
OccasionalFluid Leaks $450–$1,100 to fix

Can't confirm for this car

On AWD-equipped CX-5 models, the rear differential assembly receives drive via a propshaft from the transfer case. The input shaft oil seal on the rear differential housing is prone to failure, allowing gear oil to weep or flow from the seal area. Oil migrating rearward can contaminate the rear brake discs and pads, causing brake fade and pad glazing. If the oil level in the rear differential drops sufficiently, differential bearing and gear wear accelerates, causing noise and eventual unit failure.

Symptoms to notice

  • Oil staining or pooling directly beneath the rear differential housing, particularly around the front propshaft flange
  • Burning oil smell from the rear of the vehicle after highway driving as oil contacts hot brake components
  • Rear brake fade, sponginess, or reduced braking performance from oil-contaminated pads
  • Differential whine or gear noise under load as oil level drops from ongoing seal leak

What to check

  1. Check the area immediately behind the rear differential for oil residue on the floor or on the propshaft.
  2. Inspect rear brake discs and pads for oil contamination — glazed or discoloured pads indicate possible seal leak history.
  3. If a workshop inspection is possible: With the vehicle on a hoist, inspect the front face of the rear differential housing where the propshaft flange connects, looking for oil weeping, staining, or pooling around the input shaft seal.

Parts involved: Differential.

Ask the seller

  • “Is this vehicle AWD, and has the rear differential oil ever been inspected or changed?”
  • “Has any oil leakage been noted from beneath the rear of the vehicle?”
  • “Have the rear brakes ever shown uneven performance or required early replacement?”

Mazda CX-5 faults in detail

Each of these has its own page: the symptoms, where to look, what to ask the seller and what the repair costs. Free, no account needed.

DPF Clogging from Short Urban Trips (2.2D)Major · EngineRear Brake Caliper Adjuster Screw and Slide Pin SeizureMajor · BrakesSkyActiv-D EGR System and Intake Shutter Valve Soot Accumulation (Recall REC-000894)Major · EngineSkyActiv-D Injector Soot Deposit Build-UpMajor · EngineSKYACTIV-D Swirl Flap Carbon Soot RestrictionMajor · EngineSKYACTIV-G Intake Valve Carbon DepositsMajor · EngineTorque Converter Shudder (SkyActiv-Drive AW6A-EL)Major · Transmission

Compare the Mazda CX-5

What these repairs cost on other cars

Some of the Mazda CX-5’s documented faults are repairs other models share. Each page lists the documented NZ cost for every model it affects.

Buying guides that cover the Mazda CX-5

Other Mazda models

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Mazda CX-5 buyer questions

Is the Mazda CX-5 reliable?

Like any used car, it depends on the specific example and its service history. Across the 36 documented faults for the Mazda CX-5, the recurring problem areas are engine, brakes, and body & rust. A Mazda CX-5 with a full service history and no signs of the issues listed on this page can be a sound buy but each one needs to be checked individually before you commit.

What are the most common problems with a used Mazda CX-5?

We've catalogued 36 known faults for the Mazda CX-5, covering engine, brakes, and body & rust. All 36 are written out in full on this page, with the symptoms to notice, what to inspect, and typical repair costs for each. Free to read, no account needed.

How much do repairs cost on a Mazda CX-5?

Most single repairs on the Mazda CX-5 fall between $450–$2,200 at NZ independent-workshop rates. Some of the 36 documented faults cost less and a few cost considerably more, and no one car needs them all. Knowing which ones to look for before you view is what lets you negotiate the price down or walk away.

Should I get a pre-purchase inspection on a Mazda CX-5?

Yes. A Mazda CX-5 inspection focused on its known weak points is the single best way to avoid an expensive mistake. KickTyres gives you a guided, model-specific inspection plus a market valuation and negotiation figure for $24.90 far less than the cost of missing one of the faults on this page.