IsItAGoodCar
Reliability Guide

Common Problems with the
2009–2010 Subaru Forester Mk3 (SH)

We've identified 3 known issues that can affect the 2009–2010 Subaru Forester Mk3 (SH). 1 of these are serious faults that could be expensive to repair.

3
Known Issues
1
Serious
2
Moderate
0
Minor

All Known Issues

Boxer Diesel Crankshaft Failure

SeriousEngine

The EE20 diesel in SH Foresters is notorious for snapped crankshafts or spun main bearings, often turning the car into an uneconomic repair.

Est. Repair Cost: £3,000–£6,000
Warning Signs:

Deep metallic knocking, Sudden loss of power, Metal flakes in the oil

What to Inspect:
  • Demand specialist-grade service history
  • Listen carefully from cold and hot
  • Be especially cautious with high-mileage 2.0D cars
Verified by IsItAGoodCar Research Team

Rear Self-Levelling Suspension Failure

ModerateSuspension & Chassis

Factory self-levelling rear dampers lose pressure and leak, leaving the back of the car sagging when unladen and especially when towing or carrying weight.

Est. Repair Cost: £500–£1,200
Warning Signs:

Rear sits low, Bouncy rear axle, Fluid misting on rear dampers

What to Inspect:
  • Compare both rear arch gaps
  • Look for oil staining on the shocks
  • Ask whether a standard spring-and-strut conversion has already been fitted
Verified by IsItAGoodCar Research Team

Rear Subframe and Mount Corrosion

ModerateBodywork & Rust

UK road salt can attack the rear subframe, suspension mounts and brake pipe area long before the body panels look especially rusty.

Est. Repair Cost: £400–£1,500
Warning Signs:

Heavy rust scaling underneath, Advisories for corrosion near mounts, Seized suspension bolts

What to Inspect:
  • Inspect the rear cradle on a ramp if possible
  • Read past MOT corrosion advisories closely
  • Check for fresh underseal hiding flaky metal
Verified by IsItAGoodCar Research Team

Buying Tips for 2009–2010 Subaru Forester Mk3 (SH)

  • ✓A diesel needs impeccable servicing and should sound smooth at idle; any deep knock is a walk-away warning.
  • ✓Check the rear ride height on level ground, as failed self-levelling dampers leave the car sitting noticeably low.
  • ✓Inspect the rear subframe, spring seats and inner arches carefully rather than relying on a clean MOT pass.
20082011
Check a 2009–2010 Subaru Forester Mk3 (SH) by Registration