ECU Flooding (Blocked Drains)
SeriousElectrics & ElectronicsThe plenum chamber drains block with leaves, causing water to rise and submerge the engine ECU.
Est. Repair Cost: £400–£800
Reliability GuideCommon Problems with the
Common Problems with the
2001–2005 MG ZT / ZT-T
We've identified 5 known issues that can affect the 2001–2005 MG ZT / ZT-T. 3 of these are serious faults that could be expensive to repair.
5
Known Issues
3
Serious
1
Moderate
1
Minor
All Known Issues
K-Series Head Gasket Failure (1.8 Petrol)
SeriousEngineThe 1.8 K-Series petrol engine is prone to head gasket failure if the cooling system is neglected. Symptoms include overheating and oil/coolant mixing.
Est. Repair Cost: £500–£800
Brake Pipe Corrosion
SeriousBrakesThe brake pipes can corrode, particularly in areas where road salt is used. This is a serious safety concern and a common MOT failure point.
Est. Repair Cost: £100–£300
Front Coil Spring Breakage
ModerateSuspension & ChassisThe front coil springs are prone to snapping due to fierce corrosion, particularly on UK roads with salt and potholes. This is a common MOT failure.
Est. Repair Cost: £100–£250
Electric Seat Motor Failure
MinorInterior & TrimThe electric seat adjustment motor is not hugely reliable and can fail, leaving the seat stuck in one position.
Est. Repair Cost: £100–£250
Buying Tips for 2001–2005 MG ZT / ZT-T
- ✓Check the "Plenum" drains under the windscreen; if blocked, they flood the ECU, which is a terminal bill.
- ✓On the CDTi, check the in-tank and under-bonnet fuel pumps; they are known failure points.
- ✓Inspect the rear coil springs, as they are prone to snapping on UK roads.