Skip to content
KickTyres
MG2017–2023 Major issues documented

MG ZS: common faults & what to check

Thinking about buying a used MG ZS (2017–2023) in New Zealand? We've documented 14 known faults for this model spanning electrical, transmission, engine, and suspension. Each researched and verified before it's published. The most serious issues here are rated major. 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 MG ZS

  • 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 →

14

Documented faults

Major

Most serious

$400–$2,500

Typical repair

15

Service milestones

Which MG ZS are you looking at?

5 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 MG ZS

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.

MG ZSEngine not picked yet

Pick the engine above first: the ZS came with 4, and without it the report has to show all of their faults. Pick the engine

Free. The paid plate check is separate, and stays optional.

Can't confirm for this car

MG ZS

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 MG ZS before you hand over any money. Every documented fault is listed below, each with its own page.

  • Costly issue

    Request a battery health report from an EV diagnostics tool or MG dealer OBD scan.

    See why

    Gen 1 Battery Pack Capacity Degradation

    The first-generation MG ZS EV (44.5 kWh CATL battery pack, 2019–2022) has documented accelerated capacity degradation in NZ and AU climates. Owners report 15–20% capacity loss by year 4–5 of ownership at 35,000–60,000 km. The BMS calibration in early units did not manage cell balancing adequately, compounding normal chemistry degradation. Replacement packs are expensive and availability through NZ and AU supply chains is limited.

    What you would notice

    • Range displayed at 100% charge significantly below original 263 km WLTP
    • State-of-charge drops faster than expected in first and last 20% of charge
    • BMS cell imbalance warnings on instrument cluster
    • Reduced regenerative braking effectiveness

    Typically $4,000–$12,000 to put right.

  • Costly issue

    Cold-start the engine yourself and listen for uneven idle.

    See why

    1.0 T-GDI: intake valve carbon build-up, misfires and hesitation

    The 1.0-litre three-cylinder turbo is a direct-injection (GDI) engine, so fuel never washes the intake valves and carbon builds up on them, especially on cars used for short urban trips. The result is hesitation, lumpy idle, misfires and a down-on-power feel; several owners have had near-new cars back at dealers repeatedly for misfire faults. Auto cars also run a petrol particulate filter (GPF) that needs regular longer runs to regenerate — constant short trips cause running problems. A walnut-blast intake clean restores performance; ignored, fouled valves lead to coil, injector and eventually valve work.

    What you would notice

    • Hesitation or 'holding back' under acceleration
    • Rough or lumpy idle when warm
    • Engine warning light with misfire codes
    • Poor fuel economy for the size of engine

    Typically $600–$2,500 to put right.

  • Costly issue

    Ask the dealer or MG service agent to confirm by VIN that all BMS software campaigns are completed.

    See why

    ZS EV (Gen 1): battery management system faults and range loss after updates

    Gen 1 ZS EVs (44.5 kWh pack) went through a series of BMS software campaigns in Australia — including the SA015 update in 2020 and further BMS revisions into 2021 — after cars showed cell-balancing problems, falling fully-charged voltage and noticeable range loss over charging cycles. A later update (BMS Update 4, January 2021) largely fixed the balancing issue. Cars that missed the updates can show sudden range drops, stuck charging at high state-of-charge, or in the worst cases an 'EV System Malfunction' warning and shutdown. All fixes are dealer software updates — free — but a used import may not have had them.

    What you would notice

    • Indicated range noticeably below ~230 km at 100% when new-ish
    • Charge stops or slows dramatically in the last 10-20%
    • 'EV System Malfunction' warning
    • Range drops in sudden steps rather than gradually

    Typically $0–$800 to put right.

  • Costly issue

    Inspect all intercooler hose connections and clamp or clip condition.

    See why

    1.3T Turbo Intercooler Pipe Clip Failure Causing Boost Leak

    The 1.3-litre turbocharged engine in ZS models uses spring-clip retained intercooler hose connections that are prone to releasing under boost pressure, causing a sudden loss of engine power and a hissing noise under acceleration. The failure is triggered by clip fatigue or incorrect seating during servicing. Affected vehicles typically show hesitation and power drop under load. Replacement with revised worm-drive clamps or dealer-supplied updated clips is the standard fix.

    What you would notice

    • Loss of power under acceleration, particularly at higher throttle inputs
    • Hissing sound from the engine bay under load
    • Boost pressure fault code such as P0299
    • Engine entering a low-power protection mode

    Typically $100–$450 to put right.

  • Costly issue

    Bring or borrow a Type 2 cable and test an AC charge during the viewing — confirm the car actually draws power, not just shows connected.

    See why

    ZS EV: on-board charger and AC charging faults ('connected but not charging')

    A recurring ZS EV complaint is the car refusing to AC charge at home or on public posts — the screen shows connected but no charge flows. Causes range from software and BMS glitches (fixed by updates or a 12V battery disconnect reset) to a genuinely failed on-board charger (OBC), which is an expensive part. Some cars also fail to negotiate with certain older public AC stations. DC fast charging usually still works when the OBC has failed, which is a useful diagnostic clue.

    What you would notice

    • 'Connected, not charging' on the dash
    • AC charging works intermittently or only at some stations
    • Charging much slower than the rated 7 kW
    • DC charging fine but AC dead

    Typically $2,000–$5,000 to put right.

  • Costly issue

    Test drive in stop-start conditions: repeated gentle take-offs, crawling in traffic, and a hill start.

    See why

    Jerky or hesitant automatic transmission behaviour

    The 1.0T's six-speed automatic is known for jerky low-speed shifts, hesitation pulling out of junctions and occasional clunky downshifts; the 1.5's four-speed auto is dated and revvy but tougher. Many complaints are improved by transmission software updates and a fluid service, but some gearboxes have needed valve-body or torque-converter work. On a budget SUV a gearbox rebuild can approach the car's value, so test thoroughly.

    What you would notice

    • Jerky 1-2 and 2-3 shifts in traffic
    • Pause then surge when accelerating from a junction
    • Clunk on downshift coming to a stop
    • Shudder under light throttle

    Typically $400–$4,500 to put right.

MG ZS service schedule

What falls due, and at what distance, for each generation of the MG ZS. 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.

MG ZS Hybrid+ (Second Generation) · 2024–2026 · 1.5L Hybrid+ - Petrol-Electric powertrain

Hybrid

Due by distance

  1. 15,000 km

    Routine first service — an oil change plus diagnostic checks on the car's systems.

  2. 30,000 km

    Brake fluid flush and a new cabin air filter to keep everything performing properly.

  3. 60,000 km

    Full check of the hybrid battery cooling system, and the spark plugs may be looked at too.

MG ZS SUV (First Generation) · 2017–2024 · 1.5L NSE - VTi/Excite trim

Petrol

Due by distance

  1. 60,000 km

    Make sure the transmission fluid has been inspected and that general servicing is up to date.

  2. 100,000 km

    Spark plugs and auxiliary drive belts should be reviewed for replacement at this stage.

  3. 120,000 km

    Check the suspension bushings and the alignment to keep the ride feeling smooth.

MG ZS SUV (First Generation) · 2017–2024 · 1.0L Turbo - Essence trim

Petrol

Due by distance

  1. 60,000 km

    Spark plugs and the air filter are usually due, which keeps the turbo running efficiently.

  2. 100,000 km

    Check the serpentine belt, and think about a full transmission fluid service.

  3. 120,000 km

    Suspension parts such as sway bar links or bushings often need inspecting by now to keep the car feeling new.

MG ZS Mk1 (Original) · 2001–2005 · 1.6L K-Series - Entry level trim

Petrol

Due by distance

  1. 100,000 km

    Check the state of the cooling system parts, particularly the water pump and thermostat.

  2. 150,000 km

    Worth reviewing the suspension arm bushes and confirming the steering rack still feels tight and responsive.

  3. 200,000 km

    Have a specialist look over the internal engine seals and hoses — rubber hardens as it ages.

MG ZS Mk1 (Original) · 2001–2005 · 2.5L KV6 - Performance version

Petrol

Due by distance

  1. 100,000 km

    Auxiliary belts and cooling hoses should be inspected for perishing at this point.

  2. 120,000 km

    The KV6 cam belt service is usually due here, and it is a fiddly job that needs doing carefully.

  3. 150,000 km

    Review the suspension bushings and struts so the handling stays as sharp as the factory intended.

See all 14 documented issuesEverything researched for the MG ZS.
Depends on which engine this MG ZS has — 14Each of these is documented for one particular engine. Pick the year and engine above to see which of them apply.
Engine, transmission & cooling4

01Jerky or hesitant automatic transmission behaviour

Test drive in stop-start conditions: repeated gentle take-offs, crawling in traffic, and a hill start.petrol2017 onwardTransmission
OccasionalTransmission $400–$4,500 to fix

Can't confirm for this car

The 1.0T's six-speed automatic is known for jerky low-speed shifts, hesitation pulling out of junctions and occasional clunky downshifts; the 1.5's four-speed auto is dated and revvy but tougher. Many complaints are improved by transmission software updates and a fluid service, but some gearboxes have needed valve-body or torque-converter work. On a budget SUV a gearbox rebuild can approach the car's value, so test thoroughly.

Symptoms to notice

  • Jerky 1-2 and 2-3 shifts in traffic
  • Pause then surge when accelerating from a junction
  • Clunk on downshift coming to a stop
  • Shudder under light throttle

What to check

  1. Test drive in stop-start conditions: repeated gentle take-offs, crawling in traffic, and a hill start.
  2. Feel for flare (revs rising without speed), harsh engagement of Drive/Reverse, and shudder.
  3. Ask whether any gearbox software updates or fluid services have been done — no fluid change by 60,000 km is a red flag.

Where to look: Automatic transmission; behaviour felt through the whole car at low speed

Parts involved: Torque converter, Mechatronic / valve body.

Ask the seller

  • “Has the transmission fluid ever been changed?”
  • “Any gearbox software updates done under warranty?”
  • “Any hesitation or jerking the seller has noticed?”

021.0 T-GDI timing chain rattle and stretch

Insist on a stone-cold start — arrive early and touch the bonnet to confirm the engine is cold, then listen for rattle in the first ten seconds.petrol2017 onwardEngine
OccasionalEngine $1,500–$3,000 to fix

Can't confirm for this car

The 1.0 turbo uses a timing chain that is known to stretch earlier than expected when oil changes are skipped or cheap oil is used — the small sump and turbo work the oil hard. A stretched chain rattles on cold start and eventually throws timing correlation fault codes; left alone it risks jumping teeth and serious engine damage. Replacement is a significant job on this engine. The 1.5 non-turbo is far less affected but still needs on-time oil changes.

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 rattle for a few seconds on cold start
  • Rattle at idle that changes with revs
  • Engine light with cam/crank correlation codes

What to check

Insist on a stone-cold start — arrive early and touch the bonnet to confirm the engine is cold, then listen for rattle in the first ten seconds. Check the service book for oil changes at or before every 10,000 km/12 months. Walk away from a 1.0T with patchy oil history.

Where to look: Timing chain on the cambelt-end of the 1.0 turbo engine, behind the engine's right-side cover

Parts involved: Timing chain.

Ask the seller

  • “Full oil service history available?”
  • “Any cold-start rattle noticed?”
  • “Has the timing chain ever been replaced?”

031.0 T-GDI: intake valve carbon build-up, misfires and hesitation

Cold-start the engine yourself and listen for uneven idle.petrol2017 onwardEngineRead the full fault: symptoms, where to look, what to ask the seller

041.3T Turbo Intercooler Pipe Clip Failure Causing Boost Leak

Inspect all intercooler hose connections and clamp or clip condition.petrol2019 onwardEngine
CommonEngine $100–$450 to fix

Can't confirm for this car

Unconfirmed. This entry does not match our record of which engines and years this model was sold with, and is awaiting review. Confirm it against the car before acting on it.

The 1.3-litre turbocharged engine in ZS models uses spring-clip retained intercooler hose connections that are prone to releasing under boost pressure, causing a sudden loss of engine power and a hissing noise under acceleration. The failure is triggered by clip fatigue or incorrect seating during servicing. Affected vehicles typically show hesitation and power drop under load. Replacement with revised worm-drive clamps or dealer-supplied updated clips is the standard fix.

Symptoms to notice

  • Loss of power under acceleration, particularly at higher throttle inputs
  • Hissing sound from the engine bay under load
  • Boost pressure fault code such as P0299
  • Engine entering a low-power protection mode

What to check

Inspect all intercooler hose connections and clamp or clip condition. Look for signs of oil residue around hose joints indicating a boost leak. Squeeze hoses to check for hardening or cracking. A smoke test can confirm any boost system leak. Hard acceleration test should reveal any power drop.

Where to look: Intercooler pipes and hose connections, engine bay

Parts involved: Turbocharger.

Ask the seller

  • “Has any hissing from the engine been noticed under hard acceleration?”
  • “Has the vehicle ever lost power suddenly and then recovered?”
  • “Have any intercooler or boost system components been replaced?”
Electrical8

01Gen 1 Battery Pack Capacity Degradation

Request a battery health report from an EV diagnostics tool or MG dealer OBD scan.ev2019–2022ElectricalRead the full fault: symptoms, where to look, what to ask the seller

02ZS EV: on-board charger and AC charging faults ('connected but not charging')

Bring or borrow a Type 2 cable and test an AC charge during the viewing — confirm the car actually draws power, not just shows connected.ev2020 onwardElectrical
OccasionalElectrical $2,000–$5,000 to fix

Can't confirm for this car

A recurring ZS EV complaint is the car refusing to AC charge at home or on public posts — the screen shows connected but no charge flows. Causes range from software and BMS glitches (fixed by updates or a 12V battery disconnect reset) to a genuinely failed on-board charger (OBC), which is an expensive part. Some cars also fail to negotiate with certain older public AC stations. DC fast charging usually still works when the OBC has failed, which is a useful diagnostic clue.

Symptoms to notice

  • 'Connected, not charging' on the dash
  • AC charging works intermittently or only at some stations
  • Charging much slower than the rated 7 kW
  • DC charging fine but AC dead

What to check

  1. Bring or borrow a Type 2 cable and test an AC charge during the viewing — confirm the car actually draws power, not just shows connected.
  2. Ask about any history of failed charging sessions and check for OBC replacement invoices.
  3. Confirm remaining battery/EV component warranty (7 years in NZ) as the OBC is typically covered.

Where to look: On-board charger under the bonnet; charging behaviour shown on the instrument display

Parts involved: 12V battery.

Ask the seller

  • “Does it reliably charge on a home wall box?”
  • “Has the on-board charger ever been replaced?”
  • “Is the car still within MG's 7-year warranty?”

03Gen 2 Heat Pump Compressor Failure

Test cabin heating with engine cold in cool conditions.ev2022 onwardElectrical
OccasionalElectrical $1,200–$3,500 to fix

Can't confirm for this car

The second-generation MG ZS EV (51 kWh, 2022-on) added a heat pump for cabin heating efficiency. Units have been documented with heat pump compressor failure within the first two years, reverting the vehicle to resistive heating only and causing significant real-world range reduction in cold weather. The refrigerant circuit and compressor assembly are the primary failure points reported by NZ and AU owners.

Symptoms to notice

  • Cabin heating ineffective or slow in ambient temperatures below 10°C
  • HVAC system fault codes on instrument cluster
  • Excessive range loss in cold weather beyond normal EV battery behaviour
  • Heat pump compressor noise before complete failure

What to check

  1. Test cabin heating with engine cold in cool conditions.
  2. Ask about any warranty claims related to the heating system.
  3. If a workshop inspection is possible: Check for HVAC fault codes using diagnostic scan.
  4. Verify heat pump compressor operation with a technician's diagnostic tool.

Where to look: Heat pump compressor in engine bay, HVAC control module under dash

Ask the seller

  • “Has the heat pump ever been replaced or repaired under warranty?”
  • “What is heating performance like in NZ winter conditions?”
  • “Any HVAC or climate system fault codes in the vehicle history?”

04ZS EV: water ingress at the charge port causing charging failure or HV shutdown

The ZS EV charges through a port hidden behind the front badge, and the design relies on small rubber bungs protecting the charge pins.ev2020–2023Electrical
OccasionalElectrical $300–$3,500 to fix

Can't confirm for this car

The ZS EV charges through a port hidden behind the front badge, and the design relies on small rubber bungs protecting the charge pins. When the bungs are lost or seals fail, rainwater reaches the pins and connector loom, causing failed charging sessions, corrosion, and in documented cases a high-voltage battery shut-off leaving the car immobile. Repairs range from cleaning and new seals to replacing the charge port assembly or sections of the HV loom. Water damage claims can also get messy with warranty assessors, so evidence of dry, undamaged pins matters at purchase.

Symptoms to notice

  • 'Connected but not charging' messages
  • Charging stops in wet weather
  • Corrosion or green residue on charge pins
  • HV system warning after heavy rain

What to check

  1. Open the front badge flap and inspect the charge port: rubber protective bungs present on their tether, pins clean and bright with no green corrosion, drain area clear of debris.
  2. Ask to see the car charge successfully during the viewing — ideally on both AC and DC.
  3. Be wary of a car parked nose-in to weather with missing bungs.

Where to look: Charge port behind the front grille badge flap

Parts involved: Body corrosion.

Ask the seller

  • “Are the charge port protective bungs still present?”
  • “Has it ever failed to charge or shown an HV fault after rain?”
  • “Any charge port or wiring repairs on record?”

05ZS EV (Gen 1): battery management system faults and range loss after updates

Ask the dealer or MG service agent to confirm by VIN that all BMS software campaigns are completed.ev2020–2021ElectricalRead the full fault: symptoms, where to look, what to ask the seller

06Stability control software recall (REC-001007) and infotainment glitches

Check the VIN on vehiclerecalls.gov.au (or ask an MG dealer) to confirm REC-001007 has been completed.petrol2017–2018Electrical
OccasionalElectrical $0–$600 to fix

Can't confirm for this car

Early ZSs (2016-2018 build) were recalled in Australia under REC-001007 for a software fault in the stability control system — the fix is a free dealer software update, but grey/parallel imports may never have had it done. Across all years the touchscreen infotainment is also known for freezing, rebooting and losing Bluetooth or reversing-camera feed; usually cured by software updates rather than hardware. Confirm the recall status by VIN before purchase.

Symptoms to notice

  • ESC/traction warning light on or flickering
  • Touchscreen freezes or reboots
  • Reversing camera intermittently black
  • Bluetooth drops out

What to check

  1. Check the VIN on vehiclerecalls.gov.au (or ask an MG dealer) to confirm REC-001007 has been completed.
  2. During the viewing use the touchscreen constantly, test the reversing camera several times and pair a phone.
  3. Confirm no warning lights stay on after start-up.

Where to look: Stability control ECU (software); centre touchscreen in the dash

Ask the seller

  • “Has the stability control recall been completed — can you show the dealer stamp or letter?”
  • “Any infotainment freezes or camera dropouts?”

07ZS EV: traction battery degradation — how to check before buying

Ask an MG dealer or NZ EV specialist for a battery state-of-health report — this is cheap and definitive.ev2020 onwardElectrical
RareElectrical $12,000–$22,000 to fix

Can't confirm for this car

ZS EV packs have generally held up well — Gen 1 (44.5 kWh NMC) cars typically retain 85-92% after 5-6 years, and the facelift's 51 kWh LFP pack degrades even more slowly and tolerates daily 100% charging. Apparent 'degradation' on Gen 1 cars is often just the BMS mis-reporting until updates and a full balancing charge are done. MG's NZ warranty covers the battery for 7 years, but out-of-warranty pack replacement is expensive, so measure state of health before purchase rather than trusting the guess-o-meter.

Symptoms to notice

  • Full-charge indicated range well below original (Gen 1: ~260 km WLTP; facelift 51 kWh: ~320 km)
  • Rapid range drop in cold weather beyond the normal 15-20%
  • Battery warning lights

What to check

  1. Ask an MG dealer or NZ EV specialist for a battery state-of-health report — this is cheap and definitive.
  2. Otherwise charge to 100%, note indicated range, and drive a known distance comparing consumption.
  3. Confirm remaining battery warranty (7 years/unlimited km NZ passenger cars) from first registration; a Gen 1 car near warranty end deserves a proper SoH test.

Where to look: Traction battery pack under the floor

Ask the seller

  • “Can I see a battery state-of-health report?”
  • “What range does it show at 100% charge?”
  • “When was it first registered — how much of the 7-year warranty remains?”
  • “Was it usually charged at home on AC?”

08ZS EV (facelift): 'Vehicle Control System Fault' warnings and software gremlins

Start the car several times during the viewing, including after locking and walking away.ev2022 onwardElectrical
OccasionalElectrical $0–$500 to fix

Can't confirm for this car

The 2022 facelift (51 kWh LFP standard / 72 kWh long range) fixed the Gen 1 BMS saga but introduced its own software gremlins: owners report 'Vehicle Control System Fault' warnings, cars refusing to go into Ready mode, and iSmart/infotainment glitches. Most cases are resolved with dealer software updates or a 12V battery reset, and hardware replacement is rare. Because the errors can strand the car until reset, confirm all software campaigns are done and the 12V battery is healthy.

Symptoms to notice

  • 'Vehicle Control System Fault' message on start-up
  • Car will not enter Ready/drive mode until locked and reset
  • Infotainment or iSmart app dropouts
  • Random warning light clusters that clear themselves

What to check

  1. Start the car several times during the viewing, including after locking and walking away.
  2. Ask the MG dealer to confirm by VIN that all software updates/service campaigns are applied.
  3. Check the 12V battery age — a weak 12V causes many of these phantom faults.

Where to look: Vehicle control ECUs (software); 12V auxiliary battery under the bonnet

Parts involved: 12V battery.

Ask the seller

  • “Has it ever refused to start or shown a Vehicle Control System Fault?”
  • “Are all software updates applied?”
  • “Has the 12V battery been replaced?”
Body, brakes, suspension & interior2

01Front Wheel Bearing Premature Failure

Lift front of vehicle and spin each wheel by hand, checking for roughness or grinding.ev2019–2021Suspension
OccasionalSuspension $400–$900 to fix

Can't confirm for this car

Early-production MG ZS EV units (2019–2021) have a documented pattern of front wheel bearing failure before 50,000 km. The bearing specification used in initial production was not adequately rated for the additional unsprung mass of the electric front motor and single-speed drive unit. Replacement requires workshop access to the hub assembly and may trigger ABS reluctor ring damage. Reported by AU and NZ independent mechanics.

Symptoms to notice

  • Humming or droning from front wheel increasing with vehicle speed
  • Noise shifts which side is louder when cornering (load transfer test)
  • ABS reluctor ring damage causing ABS fault codes
  • Vibration felt through steering wheel at 80–100 km/h

What to check

  1. Lift front of vehicle and spin each wheel by hand, checking for roughness or grinding.
  2. Verify no play at 3 and 9 o'clock.
  3. Scan for ABS wheel-speed sensor fault codes.
  4. Test drive at highway speed listening for droning that shifts under steering input.

Where to look: Front left and right wheel hub bearing assembly

Parts involved: Wheel bearing.

Ask the seller

  • “Any humming or droning noise from the front at 80–100 km/h?”
  • “Have the front wheel bearings been inspected or replaced?”
  • “Any ABS or ESP warning lights in the vehicle's history?”

02Front Brake Dust Shield and Pad Backing Plate Corrosion

Check brake pad backing plates for flaking rust.petrol2017 onwardBrakes
CommonBrakes $250–$700 to fix

Can't confirm for this car

The front brake dust shields and brake pad backing plates on MG ZS models corrode prematurely in NZ and AU conditions, particularly in coastal and high-rainfall areas. Corroded dust shields can contact the brake rotor causing dragging, uneven pad wear, and a metallic scraping sound at low speed. Backing plate corrosion can compromise pad retention. The issue is exacerbated on vehicles washed infrequently or parked near the coast. Replacement of dust shields and a full brake service is the standard resolution.

Symptoms to notice

  • Metallic scraping or grinding from the front brakes at low speed
  • Brake drag causing the vehicle to resist rolling freely
  • Visible heavy rust on the dust shield behind the rotor
  • Uneven front brake pad wear across the pad face

What to check

  1. Check brake pad backing plates for flaking rust.
  2. Inspect pad thickness and confirm even wear.
  3. Push the vehicle forward by hand to feel for drag.
  4. If a workshop inspection is possible: With the wheel removed, inspect the dust shield behind each front rotor for corrosion and contact scoring on the inner rotor face.

Where to look: Front brake assembly, dust shields and pad backing plates behind each rotor

Parts involved: Body corrosion.

Ask the seller

  • “Has any scraping or grinding been heard from the front brakes?”
  • “Has the vehicle been used near the coast or in high-rainfall areas?”
  • “When were the front brakes last serviced or inspected?”

MG ZS 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.

1.0 T-GDI: intake valve carbon build-up, misfires and hesitationMajor · EngineGen 1 Battery Pack Capacity DegradationMajor · ElectricalZS EV (Gen 1): battery management system faults and range loss after updatesMajor · Electrical

What these repairs cost on other cars

Some of the MG ZS’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 MG ZS

Other MG models

MG HS9 documented faultsMG MG37 documented faultsMG ZS EV5 documented faultsMG ZST5 documented faults

MG ZS buyer questions

Is the MG ZS reliable?

Like any used car, it depends on the specific example and its service history. Across the 14 documented faults for the MG ZS, the recurring problem areas are electrical, transmission, and engine. A MG ZS 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 MG ZS?

We've catalogued 14 known faults for the MG ZS, covering electrical, transmission, and engine. All 14 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 MG ZS?

Most single repairs on the MG ZS fall between $400–$2,500 at NZ independent-workshop rates. Some of the 14 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 MG ZS?

Yes. A MG ZS 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.