IsItAGoodCar
Reliability Guide

Common Problems with the
1999 MG MGF

We've identified 2 known issues that can affect the 1999 MG MGF. 1 of these are serious faults that could be expensive to repair.

2
Known Issues
1
Serious
1
Moderate
0
Minor

All Known Issues

Head Gasket Failure

SeriousEngine

Standard K-Series issue, exacerbated by the mid-engine layout and long coolant pipes to the front radiator.

Est. Repair Cost: £600–£900
Warning Signs:

Overheating, Oil/coolant mix, Loss of heater heat

What to Inspect:
  • Evidence of MLS gasket and stainless under-car coolant pipe upgrades
Verified by IsItAGoodCar Research Team

Hydragas Suspension Leaks/Depressurisation

ModerateSuspension & Chassis

The unique interconnected fluid/gas suspension system can leak or lose pressure over time, leading to a harsh ride and low ground clearance.

Est. Repair Cost: £50–£100 (Re-gas) / £400+ (Displacement unit)
Warning Signs:

Car sitting lower than 368mm (front hub to wheel arch), Bumpy, uncomfortable ride, Car leaning to one side

What to Inspect:
  • Measure the ride height on a level surface
  • Check for fluid leaks around the suspension spheres
Verified by IsItAGoodCar Research Team

Buying Tips for 1999 MG MGF

  • ✓Check the ride height; if it looks low, the Hydragas system needs pumping up (specialist tool required).
  • ✓Look for signs of head gasket failure, as the K-Series engine is very sensitive to any coolant loss.
  • ✓Test the power steering; early EPAS systems can sometimes pull to one side if the sensor is faulty.
Check a 1999 MG MGF by Registration