Impreza / Forester
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Which Subaru Impreza / Forester engine is the most reliable? See common problems, reviews and reliability verdicts across generations and engines.
Frequently asked questions
Which Subaru Impreza / Forester engine is the most reliable?
2.0 Boxer petrol (EJ20 / FB20) — Reliable verdict. The 2.0 flat-four is the safer boxer choice — it does NOT share the EJ25's notorious head-gasket failures. Robust with regular oil changes and timing-belt/chain maintenance. Thirsty (AWD) and a bit gruff, but dependable.
Which Subaru Impreza / Forester engines should you avoid?
Engines with the weakest reliability verdicts: 2.0D Boxer diesel (EE20).
What are the most common Subaru Impreza / Forester problems?
The most commonly reported problems across all Subaru Impreza / Forester generations and engines: Head gasket failure, Crankshaft failure (early 2008–2011), Coolant maintenance dependency, Timing belt/chain + oil discipline, FB20 oil consumption (2011–2014) / EJ20 head gasket weep at age.