Legacy / Outback
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Which Subaru Legacy / Outback engine is the most reliable? See common problems, reviews and reliability verdicts across generations and engines.
Frequently asked questions
Which Subaru Legacy / Outback engine is the most reliable?
3.6R (EZ36 flat-six) — Reliable verdict. The EZ36 flat-six is the unsung hero of the range — smooth, torquey and genuinely robust, with no head-gasket vice and chain (not belt) drive. The catch is running cost: it's thirsty, AWD running gear and the auto want servicing, and it's a niche engine for parts. Mechanically it's the engine to have if you can stomach the fuel bills; an honest high-mileage example is a safe bet.
Which Subaru Legacy / Outback engines should you avoid?
Engines with the weakest reliability verdicts: 2.0D boxer diesel (EE20).
What are the most common Subaru Legacy / Outback problems?
The most commonly reported problems across all Subaru Legacy / Outback generations and engines: Oil consumption (low-tension rings), AWD/CVT fluid discipline, Crankshaft / block cracking, Head gasket failure, DPF clogging.