3.6R (EZ36 flat-six)

2009–2014 · petrol · 3630cc · 260hp

Engine codes: EZ36

Reliable

Reliability, common problems and owner reviews for the Subaru Legacy / Outback 3.6R (EZ36 flat-six). Check this before you buy used.

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.

Known Issues

Fuel / running costminor

Thirsty flat-six; AWD + auto add servicing cost.

Fix / Workaround: Budget for fuel; service driveline on schedule.

Repair cost: €150–€700

Niche partsminor

Low-volume six — some parts pricier/scarcer.

Fix / Workaround: Use a Subaru specialist.

Valve cover gasket leaks — flat-six labor pricesminor

The EZ36 itself is robust (chain-driven, no head gasket epidemic), but valve cover gaskets weep with age and access on a boxer six makes a cheap part a labor bill.

Fix / Workaround: Price the reseal into the purchase if covers are damp; nothing urgent about it.

Repair cost: €200–€500

Typically appears after: 150,000 km

Mileage Thresholds

After 200,000 km: Durable if serviced.

After 180,000 km: Gaskets and access-labor items only — the EZ36 has no documented structural weakness.

Fault Codes to Scan

P0011AVCS timing over-advanced — usually a solenoid/screen, not mechanical wear.minor

P0301Cylinder misfire — coils/plugs; access is the cost, not the parts.minor

Pre-Purchase Checklist

☐The robust, no-head-gasket choice
☐Budget for fuel + AWD servicing
☐Healthy auto on test drive

Frequently asked questions

Is the Subaru Legacy / Outback 3.6R (EZ36 flat-six) reliable?

Reliable — 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.

What are the common problems and reviews for the Subaru Legacy / Outback 3.6R (EZ36 flat-six)?

The most commonly reported problems: Fuel / running cost, Niche parts, Valve cover gasket leaks — flat-six labor prices.

Is a used Subaru Legacy / Outback 3.6R (EZ36 flat-six) worth buying?

Minor issues only, easy to maintain, no design flaws. A safe used buy.