MG ZST: common faults & what to check

Which MG ZST are you looking at?

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

Engine not documented

2 variants documented

2018–2024ZS112018–2024ZS11Engine not documented for this generationEngine not documentedDocumented issues1 knownSee faults & what to checkKickTyres illustration, not a photograph.

2024–now2024–nowGenerationEngine not documented for this generationEngine not documentedDocumented issues3 knownSee faults & what to checkPhoto: © M 93 via Wikimedia Commons, CC BY-SA 3.0 de.

Start your free check on this MG ZST

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.

The checks worth doing on a MG ZST 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 Australian 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 Australian 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 ≈A$3,680–11,040 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 ≈A$90–410 to put right.

• Costly issue

  Test cabin heating with engine cold in cool conditions.

  See why

  Gen 2 Heat Pump Compressor Failure

  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 Australian owners.

  What you would 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

  Typically ≈A$1,100–3,220 to put right.

• Costly issue

  Lift front of vehicle and spin each wheel by hand, checking for roughness or grinding.

  See why

  Front Wheel Bearing Premature Failure

  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 Australian independent mechanics.

  What you would 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

  Typically ≈A$370–830 to put right.

• Common issue

  Check brake pad backing plates for flaking rust.

  See why

  Front Brake Dust Shield and Pad Backing Plate Corrosion

  The front brake dust shields and brake pad backing plates on MG ZS models corrode prematurely in Australian 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.

  What you would 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

  Typically ≈A$230–640 to put right.

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