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
2017 MG MG3
Mid-cycle models benefit from improved build quality but still carry the same water ingress and clutch weaknesses. These are often the best value examples if well maintained.
What changed for 2017
- •Minor equipment upgrades
- •Revised interior trim options
- •Updated infotainment system
Common MOT watch-outs
- !Radiator leaks becoming more common
- !Clutch master/slave cylinder failures
- !Door seal deterioration
5
Known Issues
2
Serious
3
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
Door Seal Water Ingress
ModerateBodywork & RustEarly MG3 models have been known to let water in through door seals, leading to damp carpets and a musty smell inside the cabin.
Est. Repair Cost: £50–£150
Buying Tips for 2017 MG MG3
- ✓Check the coolant expansion tank level regularly
- ✓Look for evidence of clutch replacement
- ✓Inspect the door seals for any signs of wear