IsItAGoodCar
Reliability Guide

Common Problems with the
2006–2007 Subaru Forester Mk2 (SG)

We've identified 2 known issues that can affect the 2006–2007 Subaru Forester Mk2 (SG). 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 (2.5L Engines)

SeriousEngine

The 2.5L EJ25 engine in the SG XT is prone to external coolant and oil leaks from the head gaskets, eventually leading to overheating.

Est. Repair Cost: £1,200–£2,000
Warning Signs:

Coolant smell from engine bay, Oil/coolant weeping at the block join, Bubbles in the expansion tank

What to Inspect:
  • Check the engine block join from underneath
  • Look for white residue around the expansion tank
  • Confirm if Multi-Layer Steel (MLS) gaskets have been fitted
Verified by IsItAGoodCar Research Team

Self-Levelling Suspension (SLS) Failure

ModerateSuspension & Chassis

The original rear struts leak and sag over time. Replacing them with OEM parts is prohibitively expensive in the UK.

Est. Repair Cost: £400–£800
Warning Signs:

Rear sits noticeably lower, Bouncy ride over bumps, Fluid leaks on the rear struts

What to Inspect:
  • Check arch-to-tyre gap at the rear
  • Look for standard spring conversions as a positive sign
  • Inspect the struts for oil misting
Verified by IsItAGoodCar Research Team

Buying Tips for 2006–2007 Subaru Forester Mk2 (SG)

  • ✓Avoid 2.5 XT models with no history of head gasket or cambelt work unless the price reflects the risk.
  • ✓Check for the "saggy butt" look, indicating failed self-levelling rear suspension.
  • ✓Wind noise from the door gussets (mirrors) is common and can be fixed with a simple seal replacement.
20052008
Check a 2006–2007 Subaru Forester Mk2 (SG) by Registration