IsItAGoodCar

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

ECU Flooding (Blocked Drains)

SeriousElectrics & Electronics

The plenum chamber drains block with leaves, causing water to rise and submerge the engine ECU.

Estimated cost: £400–£800Affects: 2001–2005Often appears around: Maintenance-dependent

Typical symptoms

  • •Car cuts out
  • •Refusal to start
  • •Random electrical glitches

What to inspect before you buy

  • ✓Reach into the plenum (below wipers) and feel for standing water or debris
  • ✓Ensure the drain "rubbers" have been cleared or removed

K-Series Head Gasket Failure (1.8 Petrol)

SeriousEngine

The 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.

Estimated cost: £500–£800Affects: 2001–2005Often appears around: 40,000–80,000 miles

Typical symptoms

  • •Overheating
  • •Oil in coolant / Coolant in oil
  • •Loss of heater performance

What to inspect before you buy

  • ✓Check the oil filler cap and expansion tank for contamination
  • ✓Verify the coolant level and condition

Brake Pipe Corrosion

SeriousBrakes

The brake pipes can corrode, particularly in areas where road salt is used. This is a serious safety concern and a common MOT failure point.

Estimated cost: £100–£300Affects: 2001–2005

Typical symptoms

  • •Spongy brake pedal
  • •Brake fluid leak
  • •MOT failure on corroded pipes

What to inspect before you buy

  • ✓Inspect the brake pipes for rust and leaks
  • ✓Check the MOT history for brake-related failures

Front Coil Spring Breakage

ModerateSuspension & Chassis

The 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.

Estimated cost: £100–£250Affects: 2001–2005

Typical symptoms

  • •Clunking from the front end
  • •Car sitting lower on one side
  • •MOT failure on broken spring

What to inspect before you buy

  • ✓Inspect the front springs for corrosion and cracks
  • ✓Check the MOT history for spring-related failures

Electric Seat Motor Failure

MinorInterior & Trim

The electric seat adjustment motor is not hugely reliable and can fail, leaving the seat stuck in one position.

Estimated cost: £100–£250Affects: 2001–2005

Typical symptoms

  • •Seat adjustment motor not responding
  • •Seat stuck in one position
  • •Grinding noise from seat motor

What to inspect before you buy

  • ✓Test the electric seat adjustment through its full range

Buying Tips for the 2001 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.

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Other MG ZT / ZT-T Year Periods

2001–2005

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