Rear Drive Unit Oil Leak
SeriousGearbox & TransmissionSome early MG4 models have suffered from oil leaks from the rear motor/drive unit.
Est. Repair Cost: £0 (Warranty)
Reliability GuideCommon Problems with the
Common Problems with the
2023 MG MG4
Mid-cycle models benefit from software updates and improved build quality. These are often the best value examples, offering the full MG4 experience with fewer teething issues.
What changed for 2023
- •Introduction of Extended Range models
- •Updated infotainment software
- •Revised suspension tuning
Common MOT watch-outs
- !Continued 12V battery issues on some examples
- !Infotainment glitches requiring updates
- !Brake corrosion on low-mileage cars
5
Known Issues
1
Serious
2
Moderate
2
Minor
All Known Issues
Infotainment Screen Blackouts
ModerateElectrics & ElectronicsThe central touchscreen can go black or freeze during driving, sometimes requiring a full system restart. This is a known software issue addressed by updates.
Est. Repair Cost: Software Update / £0
12V Battery Drainage
ModerateElectrics & ElectronicsLike many EVs, the 12V battery can fail or drain prematurely, preventing the car from entering "Ready" mode. This has been a common complaint on early models.
Est. Repair Cost: £120–£200
Aggressive Lane Keep Assist (LKA)
MinorSteeringThe LKA system on early software can provide sudden and intrusive steering inputs. Which? found it could pull the car onto the wrong side of the road. Software updates have improved this significantly.
Est. Repair Cost: Software Update / £0
Brake Squealing
MinorBrakesMany MG4 owners report persistent brake squeaking, especially at low speeds. This is partly due to the regenerative braking system meaning the physical brakes are used infrequently, leading to surface corrosion.
Est. Repair Cost: £0–£100
Buying Tips for 2023 MG MG4
- ✓Ask if all software updates have been applied
- ✓Test the infotainment system thoroughly
- ✓Check the brake discs for corrosion