Subaru Outback BP — Reliability

BP 2003–2007 1 engine

Reliability Summary

Engine EJ25 NA — 62/100 CAUTION
Known Issues 3

Engine in this model

CAUTION 62

EJ25 NA

2.5L NA Boxer I4

Subaru's naturally aspirated 2.5 boxer (EJ25D, EJ251, EJ252, EJ253, EJ254) in the Legacy, Outback, F...

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Known Issues Across All Engines

Issue Engine Severity Onset
Head gasket leaks (composite gaskets, EJ251/EJ252 worst) EJ25 NA critical 77,000 km – 200,000 km
Oil consumption from worn piston rings and seeping seals EJ25 NA high —
Spun bearing and cylinder-4 knock after low oil or overheating EJ25 NA moderate —