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Ford1994–2023 Critical issues documented

Ford Mustang S550: common faults & what to check

The S550 is the Ford Mustang built 2015–2023. It was sold here with the 2.3 EcoBoost and 5.0 V8 petrol. Of the 21 faults documented for the Mustang, 9 apply to this generation, each with its symptoms, what to inspect and a typical repair cost. Free, no account needed.

Check this exact Ford Mustang

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

Type the plate for the free basics. The full record is a paid check from $13.49, one car at a time, no subscription.

No NZ plate yet, or buying in Australia? Pick the generation and engine and start a free check below. New to KickTyres? How the check works →

21

Documented faults

Critical

Most serious

$600–$4,000

Typical repair

33

Service milestones

You're looking at the S550

2 engine variants are documented for this generation. Pick yours to narrow further, or keep reading for the generation as a whole.

Choose a different generation

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.

A 2016 Ford Mustang is the S550 generation (2015 to 2023).

Start your free check on this Ford Mustang

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.

Ford Mustang S550Engine not picked yet

Pick the engine above first: the Mustang came with 2, 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

Ford Mustang · 2016

Narrowed to the year. No engine is recorded for this vehicle. Pick an engine to see which faults apply.

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

  • No engine is recorded for this vehicle.

matched on year only

What to look out for

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

  • Costly issue

    Lift rear of vehicle and check for movement in differential mounting bushings and subframe bushings by prying.

    See why

    IRS rear differential and subframe bushing deterioration

    The S550 independent rear suspension introduced bushings and differential mounts that wear faster than expected under spirited driving. Differential carrier bushings and subframe bushings degrade, causing rear end vagueness, clunking, and imprecise handling. Particularly notable on cars driven hard or imported with unknown history. Aftermarket solid bushings are a common upgrade but factory rubber bushings are a known weak point.

    What you would notice

    • Clunking from rear suspension over bumps or during acceleration
    • Vague or wandering rear-end feel
    • Rear toe changes unpredictably under power
    • Vibration through chassis under hard acceleration

    Typically $600–$2,200 to put right.

  • Costly issue

    Lift front wheels and check lower ball joint for play by grasping the tyre at 6 and 12 o'clock and attempting to rock it.

    See why

    Front lower control arm ball joint wear

    The front lower control arm ball joints on the S550 are susceptible to premature wear, especially where cars have been lowered or driven aggressively. The ball joints are not separately replaceable – the entire lower control arm must be replaced when the joint fails. This significantly increases repair cost. Clunking on turn-in and over bumps is the primary indicator.

    What you would notice

    • Clunking or knocking from front suspension over bumps
    • Vague or loose steering feel at centre
    • Pulling to one side when braking
    • Uneven front tyre wear

    Typically $700–$2,000 to put right.

Ford Mustang service schedule

The 2 engines a 2016 Ford Mustang was sold with, each with its own intervals. Pick your engine above to narrow this to one. These are the model’s intervals — the car’s own service book is the only thing that can tell you what has actually been done to it.

Sixth Generation · 2015–2023 · 5.0L V8 - GT model

Petrol

Due by distance

  1. 60,000 km

    Assess brake pad wear and tyre tread depth.

  2. 100,000 km

    Refresh the transmission fluid and check the cooling system hoses.

  3. 150,000 km

    Inspect the suspension bushings and dampers for natural degradation.

Sixth Generation · 2015–2023 · 2.3L EcoBoost - Turbocharged 4-cylinder

Petrol

Due by distance

  1. 60,000 km

    Full transmission fluid service to maintain optimal shift quality.

  2. 100,000 km

    Review the turbocharger plumbing and coolant expansion tank for heat-related fatigue.

  3. 150,000 km

    Check the timing chain tensioner and auxiliary belt components.

See all 9 issues for this oneDocumented for the exact year and engine you picked, including 2 rated critical.
Body, brakes, suspension & interior2

01IRS rear differential and subframe bushing deterioration

Lift rear of vehicle and check for movement in differential mounting bushings and subframe bushings by prying.petrol2015 onwardSuspensionRead the full fault: symptoms, where to look, what to ask the seller

02Front lower control arm ball joint wear

Lift front wheels and check lower ball joint for play by grasping the tyre at 6 and 12 o'clock and attempting to rock it.petrol2015 onwardSuspension
OccasionalSuspension $700–$2,000 to fix

The front lower control arm ball joints on the S550 are susceptible to premature wear, especially where cars have been lowered or driven aggressively. The ball joints are not separately replaceable – the entire lower control arm must be replaced when the joint fails. This significantly increases repair cost. Clunking on turn-in and over bumps is the primary indicator.

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

  • Clunking or knocking from front suspension over bumps
  • Vague or loose steering feel at centre
  • Pulling to one side when braking
  • Uneven front tyre wear

What to check

  1. Lift front wheels and check lower ball joint for play by grasping the tyre at 6 and 12 o'clock and attempting to rock it.
  2. Any vertical movement indicates ball joint wear.
  3. Look for torn ball joint boots.
  4. Inspect for aftermarket lowering springs that may have accelerated wear.

Where to look: Front lower control arms, both sides

Parts involved: Ball joint.

Ask the seller

  • “Has the car been lowered or had suspension modifications?”
  • “Has a front end inspection been done in the last 20,000km?”
  • “Are there any knocking or clunking noises from the front?”
Depends on the exact engine — 7 moreDocumented for a specific engine we could not confirm from what you picked. Check the engine code on the car.
Engine, transmission & cooling7

01Coyote 5.0 V8 oil consumption and oil starvation under sustained cornering

Check oil level and condition.petrol2015 onwardEngineRead the full fault: symptoms, where to look, what to ask the seller

025.0 Coyote V8 Valve Spring Fracture

Check service history for TSB 17-0007 valve spring replacement.petrol2015 onwardEngine
OccasionalEngine $1,800–$5,500 to fix

Can't confirm for this car

Ford issued TSB 17-0007 covering premature valve spring failure on the 5.0L Coyote V8. Springs fracture at high RPM, causing a collapsed valve, misfire, and in severe cases valve-to-piston contact and complete engine failure. The TSB applies to 2011-2017 Coyote engines but failures on S550 (2015+) Mustangs are well documented. A significant proportion of enthusiast-driven Mustangs reach high RPM regularly, making this a material pre-purchase risk in the NZ used market.

Symptoms to notice

  • Single-cylinder misfire under load at high RPM
  • P030X misfire code for one cylinder
  • Ticking from valve train under load
  • Sudden loss of power accompanied by rough running

What to check

  1. Check service history for TSB 17-0007 valve spring replacement.
  2. Rev the engine to redline under controlled conditions and listen for any ticking or misfire.
  3. Scan for cylinder-specific misfire codes.

Where to look: Valve train, both cylinder heads, 5.0L V8

Ask the seller

  • “Has the valve spring TSB (17-0007) been carried out?”
  • “Has the car been tracked or regularly driven to redline?”

032.3L EcoBoost Timing Chain Stretch

Cold-start and listen for chain rattle.petrol2015 onwardEngine
OccasionalEngine $2,200–$4,800 to fix

Can't confirm for this car

The 2.3L EcoBoost four-cylinder Mustang shares the same timing chain architecture as other Ford EcoBoost applications and exhibits similar chain stretch on high-mileage or poorly serviced examples. Stretch results in cam-crank correlation codes and cold-start rattle. NZ-imported 2.3 EcoBoost Mustangs commonly arrive with US odometer readings that understate actual wear, making chain condition a key inspection point.

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

  • Cold-start rattle from front of engine
  • P0016 or P0017 cam/crank correlation codes
  • Rough idle on cold start settling after warm-up
  • Occasional hesitation at partial throttle

What to check

Cold-start and listen for chain rattle. Verify oil service history – EcoBoost chains degrade rapidly on extended intervals. If a workshop inspection is possible: OBD scan for cam timing codes.

Where to look: Timing cover, front of 2.3L four-cylinder engine

Parts involved: Timing chain.

Ask the seller

  • “What oil change frequency has been maintained?”
  • “Any engine warning lights related to timing or cam position?”

04EcoBoost 2.3T plastic charge pipe splitting under boost

Inspect the charge pipe from intercooler to throttle body for cracking, splitting, or hose clamp displacement.petrol2015 onwardEngineRead the full fault: symptoms, where to look, what to ask the seller

055.0 Coyote V8 'typewriter/BBQ tick' and cylinder scoring risk

The 5.0 Coyote V8 GT is known for a rhythmic ticking at warm idle that owners nickname the 'typewriter tick' or 'BBQ tick'.petrol2015–2023Engine
CommonEngine $0–$8,000 to fix

Can't confirm for this car

The 5.0 Coyote V8 GT is known for a rhythmic ticking at warm idle that owners nickname the 'typewriter tick' or 'BBQ tick'. Ford's official position is that it is a normal characteristic that doesn't hurt durability, and for most cars it never causes trouble. However, some engines replaced under warranty for a severe tick were found to have piston-slap-related cylinder scoring, so a loud, worsening tick is worth taking seriously on a used car you can't return. Gen-3 (2018+) engines with plasma-coated bores are part of the discussion.

Symptoms to notice

  • Rhythmic ticking/tapping at warm idle that speeds up with revs
  • Tick most noticeable once the engine is hot
  • In severe cases, tick with rising oil use

What to check

Let the engine idle until fully warm with the bonnet up and listen for a light, even tick (common and usually harmless) versus a loud, heavy knock that changes with load (a warning sign). Ask for the service history and whether oil use has climbed. A faint tick alone shouldn't scare you off, but pair it with the oil-consumption check below.

Where to look: Top end of the V8 engine; noise is most audible from the top of the block at idle

Ask the seller

  • “Does the engine tick get louder over time, and has oil use increased?”
  • “Has the engine ever been opened up or had warranty work?”

065.0 Coyote V8 elevated oil consumption under hard driving

Check the dipstick and note the level, and ask the seller how much oil it uses between changes.petrol2015 onwardEngine
CommonEngine $0–$500 to fix

Can't confirm for this car

The 5.0 Coyote in the GT can use noticeable oil, especially if the car has been driven hard or tracked - Ford considers up to roughly a litre per 1,600km to be within spec, which surprises buyers used to a car that never needs topping up. On a used performance car this matters because low oil combined with track abuse is what leads to bearing and cylinder wear. It is a normal characteristic to plan for, not necessarily a fault, but a car burning far more than that has a problem.

Symptoms to notice

  • Oil level dropping between services
  • Needing to top up oil, more so after spirited driving
  • Faint blue smoke under very hard acceleration in a worn example

What to check

  1. Check the dipstick and note the level, and ask the seller how much oil it uses between changes.
  2. Ask directly whether the car has been tracked or launched hard.
  3. A GT that needs regular top-ups is normal-ish; one that empties fast or smokes is not.

Where to look: Engine - check via the dipstick at the front of the V8

Ask the seller

  • “How much oil does it use between services?”
  • “Has this car ever been driven on a track or drag strip?”

07MT82 Manual Gearbox 1st and 2nd Gear Synchro Wear

Test cold and warm shifting through all gears, focusing on 1st-2nd.petrol2011–2017TransmissionRead the full fault: symptoms, where to look, what to ask the seller
Other Ford Mustang engines and years12 documented issues that do not apply to the one you picked.
Engine, transmission & cooling9

01Head gasket failure and coolant loss (3.8 Essex V6, 1994-1998)

Ask to see the car cold and check the coolant reservoir level before it is started, then look again after the drive.petrol1994–1998EngineRead the full fault: symptoms, where to look, what to ask the seller

02Timing chain tensioner arm and guide wear (4.6 2V V8 GT)

Ask for the engine to be cold and stand at the front of the car during start-up.petrol2000–2004Engine
OccasionalEngine $2,500–$5,000 to fix

Does not apply

The 4.6 2V uses two long timing chains with nylon-faced tensioner arms and plastic guides. On 2000-on engines the nylon face can wear through to the aluminium base, the chain goes slack and slaps, the plastic guides break, and debris can block the oil pickup screen. Ford issued a service bulletin for the same wear on 2000-2003 Crown Victoria and Grand Marquis with this engine, and Mustang owners report the same failure at higher mileage. Caught early it is a timing chain kit; if a chain jumps or the oil pickup starves, the engine can be badly damaged.

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

  • Rattle or grinding from the front of the engine, loudest on cold start
  • Slapping chain noise at idle that changes with revs
  • Check engine light for cam timing or misfire
  • Fine glittery or plastic particles in the oil

What to check

  1. Ask for the engine to be cold and stand at the front of the car during start-up; listen for a rattle or grinding from the front of the engine that lasts more than a second or two.
  2. At idle and with gentle revs, listen at the front timing cover for a slapping or whirring chain noise.
  3. Check the oil filler cap and dipstick with a phone torch for fine glittery or plastic flakes in the oil.
  4. Ask for the service history and whether the timing chains, tensioners and guides have been replaced, especially past about 160,000 km.
  5. If a workshop inspection is possible: have a mechanic listen with a stethoscope at the timing cover and inspect the oil pickup screen and old oil for nylon or aluminium debris.

Where to look: Front of the engine behind the timing cover, both cylinder banks

Parts involved: Timing chain.

Ask the seller

  • “Have the timing chains, tensioners and guides ever been replaced?”
  • “Is there any rattle on a cold start?”
  • “How often was the oil changed?”

034.6 three-valve cam phaser rattle and timing chain wear

This is a cold-start check and nothing else will do — if the seller has warmed the car up before you arrive, arrange to come back.petrol2005–2010EngineRead the full fault: symptoms, where to look, what to ask the seller

04Spark plug thread stripping and plug blow-out (4.6 2V V8 GT)

Listen for a sharp ticking or puffing noise from the top of either cylinder head at idle and when revving.petrol1996–2003EngineRead the full fault: symptoms, where to look, what to ask the seller

05Overdrive band and servo failure, slipping 3-4 shift (4R70W automatic)

On the test drive, accelerate gently to about 70 km/h and watch the rev counter on the 3-4 shift; the revs should drop cleanly, not flare up.1996–2004TransmissionRead the full fault: symptoms, where to look, what to ask the seller

0610R80 10-speed automatic harsh shifts and shudder

Drive it through slow-speed shifts and gentle acceleration and feel for harsh clunks or a shudder.petrol2018–2023Transmission
OccasionalTransmission $500–$4,000 to fix

Does not apply

From 2018 the automatic S550 uses the 10R80 10-speed auto (co-developed with GM). Owners report harsh or clunky 1-2 and 2-3 shifts, a shudder or flare on light throttle, and occasional hunting between its many ratios, particularly before the fluid and software were updated. Many cases are improved with a fluid change and control-software update, but a neglected unit with a shudder can need valve-body or clutch work. Ford issued shift-quality service updates for this transmission.

Symptoms to notice

  • Hard clunk or jolt on low-speed up/down shifts
  • Shudder or slip feeling on light acceleration
  • Gearbox hunting or holding gears oddly
  • Delayed engagement into Drive or Reverse

What to check

  1. Drive it through slow-speed shifts and gentle acceleration and feel for harsh clunks or a shudder.
  2. Ask whether the transmission fluid has been changed and whether the shift-quality software update was applied.
  3. Have it scanned for transmission codes.

Where to look: Automatic gearbox behind the engine in the transmission tunnel

Parts involved: Mechatronic / valve body, Clutch.

Ask the seller

  • “Does it clunk or shudder on gentle shifts?”
  • “Has the transmission had its fluid changed or software updated?”

074.6 V8 three-valve ignition coil failure and misfire

Start it cold and listen to the idle for an uneven beat, resting a hand on the centre console to feel a shake.petrol2005–2010EngineRead the full fault: symptoms, where to look, what to ask the seller

08Cracked plastic intake manifold coolant crossover (4.6 2V V8 GT)

petrol1996–2001CoolingRead the full fault: symptoms, where to look, what to ask the seller

09Plastic clutch quadrant and cable failure (manual)

Sit in the driver's seat with the engine off and press the clutch slowly; listen under the dash for clicking, crunching or a snap.1994–2004TransmissionRead the full fault: symptoms, where to look, what to ask the seller
Electrical2

01Blocked cowl drains flooding the passenger footwell and junction box

2005–2010ElectricalRead the full fault: symptoms, where to look, what to ask the seller

02S650 digital dash / SYNC 4 infotainment glitches and early software recalls

Start the car and watch that both screens boot cleanly and show speed and warning lights.petrol2023 onwardElectrical
OccasionalElectrical $0–$1,500 to fix

Does not apply

The latest S650 Mustang moved to twin digital screens (a fully digital instrument cluster and SYNC 4 infotainment). As with most new heavily-software cars, early build owners have reported screen freezes, black-screen-on-start, reversing-camera dropouts and other glitches that are addressed by software updates and, in some markets, recalls. Because the gauges are now a screen, a display fault can leave you without speed or warning lights, so it matters more than a normal infotainment bug.

Symptoms to notice

  • Instrument or centre screen freezes, flickers or goes black
  • Reversing camera image drops out or lags
  • Infotainment reboots itself
  • Bluetooth/Apple CarPlay dropouts

What to check

  1. Start the car and watch that both screens boot cleanly and show speed and warning lights.
  2. Select reverse and check the camera comes up promptly.
  3. Ask whether all recall and software updates have been completed at a Ford dealer - keep the paperwork.

Where to look: Digital instrument cluster and centre infotainment screen on the dashboard

Ask the seller

  • “Have all software updates and recalls been done?”
  • “Do the screens ever freeze, go black or reboot?”
Fluid leaks1

01Convertible top hydraulic cylinder and hose leaks

Ask the seller to lower and raise the roof twice while you watch; both sides should move together, smoothly, without stopping.1994–2004Fluid Leaks
CommonFluid Leaks $400–$1,800 to fix

Does not apply

Convertible SN95 and New Edge Mustangs raise and lower the roof with an electric pump and two hydraulic cylinders fed with ATF. The cylinder seals and the hose fittings wear and leak, so the roof moves slowly, unevenly or stops part way, and fluid can stain the rear seat area and roof fabric. Leaking cylinders are usually replaced as a pair, and a tired pump may need replacing too.

Symptoms to notice

  • Roof moves slowly or one side lags
  • Roof stops part way and has to be pushed
  • Red oily stains behind the rear seats or on the roof fabric
  • Pump whines but roof does not move

What to check

  1. Ask the seller to lower and raise the roof twice while you watch; both sides should move together, smoothly, without stopping.
  2. Listen to the pump behind the rear seat; a long whine with little movement means low fluid or a leak.
  3. With a phone torch, look behind the rear seats and at each side where the roof folds for red oily fluid, stains or damp carpet.
  4. Check the roof fabric and rear window for oil spots and tears.
  5. Ask whether the cylinders, hoses or pump have been replaced.
  6. If a workshop inspection is possible: have the pump reservoir level checked and the cylinders and brass hose fittings inspected for seepage.

Where to look: Pump and reservoir behind the rear seat; hydraulic cylinders at each side of the roof frame

Ask the seller

  • “Does the roof go up and down on its own every time?”
  • “Have the hydraulic cylinders or pump been replaced?”
  • “Has anyone topped up the roof pump fluid?”

Ford Mustang faults in detail

Narrowed to the Ford Mustang · 2016. 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.

Coyote 5.0 V8 oil consumption and oil starvation under sustained corneringCritical · EngineEcoBoost 2.3T plastic charge pipe splitting under boostMajor · EngineIRS rear differential and subframe bushing deteriorationMajor · SuspensionMT82 Manual Gearbox 1st and 2nd Gear Synchro WearMajor · Transmission

What these repairs cost on other cars

Some of the Ford Mustang’s documented faults are repairs other models share. Each page lists the documented NZ cost for every model it affects.

Other Ford models

Ford Ranger45 documented faultsFord Focus37 documented faultsFord Falcon36 documented faultsFord Territory21 documented faultsFord XR619 documented faultsFord Kuga17 documented faults

Ford Mustang buyer questions

Is the Ford Mustang reliable?

Like any used car, it depends on the specific example and its service history. Across the 21 documented faults for the Ford Mustang, the recurring problem areas are engine, transmission, and electrical. A Ford Mustang 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 Ford Mustang?

We've catalogued 21 known faults for the Ford Mustang, covering engine, transmission, and electrical. All 21 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 Ford Mustang?

Most single repairs on the Ford Mustang fall between $600–$4,000 at NZ independent-workshop rates. Some of the 21 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 Ford Mustang?

Yes. A Ford Mustang 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.