Engine Timing Chain Stretch
SeriousEngineThe metal timing chain can stretch over time, leading to rattling noises and, if ignored, catastrophic engine failure.
Est. Repair Cost: £500–£900
Reliability GuideCommon Problems with the
Common Problems with the
2020 MG MG3
Final year of the first-generation MG3. These newest examples are now over 5 years old, so expect minimal age-related wear if properly maintained.
What changed for 2020
- •Final production year for first generation
- •All models now include basic safety features as standard
Common MOT watch-outs
- !Minor electronic glitches
- !Brake wear on low-mileage examples
- !Tyre pressure monitoring system warnings
4
Known Issues
2
Serious
2
Moderate
0
Minor
All Known Issues
Clutch Pedal Failure
SeriousGearbox & TransmissionSome MG3 owners have reported the clutch pedal suddenly dropping to the floor and not returning. The cause is typically a failed clutch master or slave cylinder.
Est. Repair Cost: £200–£400
Thin Paint and Surface Rust
ModerateBodywork & RustOwners often report thin paint that chips easily, leading to surface rust if not treated quickly.
Est. Repair Cost: £150–£400
Leaking Radiator
ModerateCooling SystemThe radiators on some MG3s are prone to developing leaks, which can lead to overheating if coolant levels are not monitored.
Est. Repair Cost: £150–£300
Buying Tips for 2020 MG MG3
- ✓Look for a full MG service history
- ✓Test all electrical systems thoroughly
- ✓Verify the coolant system is leak-free