UK Buyer Reliability Guide3 Known Faults Documented

Subaru Forester Mk3 (SH) Common Problems & Reliability

The square-edged SH is a proper rural workhorse, but this is the Forester generation most exposed to boxer diesel failures, sagging self-levelling suspension and hidden rust underneath.

5
Generation Periods
3
Known Issues
1
Critical Faults
2
Moderate Issues

Select a Model Year Period

Detailed fault breakdown, symptoms, and estimated repair bills by production year.

Most Common Subaru Forester Mk3 (SH) Faults & Repair Costs

High Risk

Boxer Diesel Crankshaft Failure

Est. Cost£3,000–£6,000

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

Warning Signs:

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

Moderate Risk

Rear Self-Levelling Suspension Failure

Est. Cost£500–£1,200

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.

Warning Signs:

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

Moderate Risk

Rear Subframe and Mount Corrosion

Est. Cost£400–£1,500

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

Warning Signs:

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

Essential Pre-Purchase Step

Buying a used Subaru Forester Mk3 (SH)? Always check for hidden finance and write-off history.

Mechanical problems are only half the battle. Over 1 in 3 UK used cars checked have unpaid finance or accident write-off records that could cause you to lose the car or thousands in value.

Inspection Checklist for Subaru Forester Mk3 (SH) Buyers

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.