Common Problems with the
2004–2008 Subaru Forester Mk2 (SG)

We've identified 2 known issues that can affect the 2004–2008 Subaru Forester Mk2 (SG). 1 of these are serious faults that could be expensive to repair.

Known Issues

Serious

Moderate

Minor

The 2004–2008 period has 1 more issue than the Subaru Forester Mk2 (SG) average across all year periods.

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.

Most affected: 2.5 XT

Estimated cost: £1,200–£2,000Affects: 2004–2008Often appears around: 80,000–120,000 miles

Typical symptoms

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

What to inspect before you buy

✓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

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.

Estimated cost: £400–£800Affects: 2002–2008Often appears around: 70,000+ miles

Typical symptoms

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

What to inspect before you buy

✓Check arch-to-tyre gap at the rear
✓Look for standard spring conversions as a positive sign
✓Inspect the struts for oil misting

Buying Tips for the 2004 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.

2002–2003 Subaru Forester Mk2 (SG)