Subaru Outback (EJ25) 2.5L
is it a safe used buy?

A genuinely practical, capable all-wheel-drive wagon whose engine is at the centre of one of Subaru's most widely discussed reliability issues — the head gasket checklist should shape your entire buying decision.

GENERATION4th gen (2005–2009)

ENGINE2.5L EJ25

POWER165–175 hp

USED PRICE$6,000–12,000

How the engine fits this car

The Outback's wagon body and genuine all-weather capability are a comfortable, unstressed load for this engine mechanically — the risk here, detailed in full on the engine page, is a documented head gasket design concern rather than a consequence of this specific application.

Given how widely discussed this issue is within the Subaru community, treating the engine page's checklist as essential reading matters more here than almost anywhere else it's referenced on this site.

Subaru Outback (EJ25)-specific pros and cons

This is about the car itself — for engine-specific failure points, see the dedicated engine page below.

WHAT HOLDS UP WELL

Genuinely capable, practical all-wheel-drive wagon with real everyday versatility
A confirmed, repaired example (with the revised head gasket) is a meaningfully safer, well-understood buy
Strong independent specialist knowledge given how thoroughly this issue has been documented
Low purchase price reflects the issue's notoriety, which can work in a well-informed buyer's favour

WHAT TO WATCH

External head gasket coolant leak, detailed in full on the engine page, is a genuine and significant concern
Verifying repair completion requires real diligence, not just a general assurance from the seller
Resale demand has softened somewhat, reflecting broader buyer awareness of this issue
Age-related wear on suspension, electrics and interior trim is now a bigger practical factor than on newer cars

Pricing on the used market

Repair status

Typical price

What to expect

Repaired, documented

$9,500–12,000

Meaningfully safer, specialist-verified

Original, no symptoms

$7,500–9,500

Budget for the repair proactively

Original, seep present

$6,000–7,500

Treat with real caution or budget for repair

The engine itself

This Outback is a defining application of the EJ25. The head gasket checklist on the dedicated engine page is essential, not optional, before buying.

FULL ENGINE BREAKDOWNSubaru 2.5L EJ25 Flat-Four — Reliable or Not →

Pre-purchase checklist for this generation

This is non-negotiable: ask whether the head gasket has been proactively replaced with the revised design, and get documentation if so.

Check for a sweet coolant smell or visible seep near the lower edge of the cylinder head, the hallmark symptom.

Find a Subaru specialist rather than a generalist mechanic for any pre-purchase inspection, given how specific this check is.