Subaru Outback BP
Weaknesses, engine ratings and buying advice
The BP Outback (2005-2009) is the classic all-wheel-drive wagon for people who haul dog trailers, horse gear or rough field tracks and still don't want to get stuck in the mud. Symmetrical AWD, honest ground clearance, no gimmicks, plenty of load space, and a tow bar is almost always fitted. That's exactly why the range still keeps a loyal following in rural areas and among hunters, riders and tradespeople. On engines there's a clear hierarchy. The EZ30 six-cylinder boxer is the gem of the range: smooth, durable, virtually no head gasket drama, a drivetrain that runs past 300,000 km with care. If you can live with the thirst (real-world 11-13 l/100km) and the pricier timing-chain service, you buy it almost blind. The EJ253 NA four-cylinder is solid but not without faults: the head gasket is the known weak spot, usually as an external leak (oil or coolant traces at the block), often from 150,000-200,000 km. Repair on an already-stripped engine runs 1,200-2,000 euros depending on the shop, but it's worth it on a good body. The EE20 boxer diesel only arrived late in the run (EU) and is rare here. The EJ255 turbo came as the XT, a fun machine but thirsty and more demanding to maintain. On the test drive, without fail: check coolant level and expansion tank, oil film in the coolant or a low level points to the head gasket. Then kneel at the rear and hunt for subframe rust, a chronic BP issue and in the worst case an MOT killer. Rear wheel bearings often hum early, listen at steady speed for a whine that grows when you nudge the wheel. The brake lines (batch WQK-47) are a corrosion candidate, insist on a visual check on a lift. Inside, the dashboard melts in strong heat and goes sticky, no mechanical problem but ugly and hard to fix for good. 2026 market prices: usable EJ253 from around 3,000-5,000 euros, well-kept EZ30 with complete history 5,000-8,000 euros, genuine top condition above that. Insider pick: a service-booked EZ30 with documented maintenance, a sound rear axle and a clean underbody, that's Subaru longevity in its purest form, a car you buy and keep rather than pass on.
Generations
Engine Overview
The Subaru Outback BP is available with 2 engine variants — from 165 to 230 hp.
The robust 2.5-litre NA boxer with a SOHC head and i-AVLS valve control is long-lived — with one central condition: the head gasket. The factory composite gasket degrades through heat cycling and oil standing on the sealing face, typically starting to leak externally between 130,000 and 210,000 km, usually driver-side at cylinder 4. Ignored, it escalates to coolant loss, warped heads and overheating. At the due replacement a multi-layer steel gasket is essential; then the repair lasts. The NA engines only got these from the factory in 2011/2012. The second maintenance truth is the timing belt: an interference engine, interval around 170,000 km, bent valves if it snaps — always replace belt, tensioner, idlers, water pump and seals together. As the oil light only monitors pressure and gives no level warning before model year 2014, regular oil-level checks are a must, especially once the engine uses a little oil with age.
- !! Head gasket — external oil and coolant leak from 150,000 km
The factory composite head gasket degrades through heat cycling and oil standing on the sealing face. It typically starts leaking externally between 130,000 and 210,000 km, usually driver-side at cylinder 4. Left unchecked it leads to coolant loss, overheating and a warped head.
Symptoms: Coolant loss with no visible puddle, oily film down the side of the block, heater occasionally blowing cold, sweet coolant smell when warm, overheating in late stages. - !! Timing belt snap — interference engine from 170,000 km
The EJ253 is an interference engine. 105,000 mile interval. Replace water pump, tensioner, idlers, crank and cam seals in the same job. Always confirm last belt service date/mileage on a used buy.
Symptoms: Engine dies suddenly, then refuses to crank, sometimes metallic clacking from bent valves. - !! Excessive oil consumption — stuck oil control rings from 110,000 km
Late-build EJ253s (MY2010+) show the same pattern as successor FB engines: carbon-seized oil control rings cause consumption of ~1 quart per 1000 miles or worse. Long drain intervals, clogged PCV and short-trip use accelerate it.
Symptoms: Dipstick drops noticeably between changes, blue smoke under load, oil-fouled spark plugs, occasional CEL from catalyst contamination.
+ 6 more engine weaknesses + vehicle weaknesses
The 2.5-litre turbo boxer trades revs for displacement: strong torque from low down, plus the typical boxer rumble at idle created by unequal-length headers. Intake-side AVCS smooths the response while the character stays gruff and muscular. Its Achilles heel is the fourth cylinder: the stock intake manifold feeds it worse, it sits furthest from the water pump, runs leaner and hotter — and is the first to crack a ringland under detonation. High-octane fuel and a clean tune are therefore non-negotiable. The rod bearings are sensitive to cold-start full throttle and stretched oil intervals; affected model years got a warranty extension for it. The brazed oil pickup can crack, and the turbo and AVCS banjo screens clog with sludge, causing turbo or cam-timing trouble. With short oil intervals, good fuel, careful warm-ups and clear oil passages it is a long-lived engine.
- !! Ringland Failure — Piston Breakage from 100,000 km
Cast iron pistons with thin ringlands crack under detonation (knock). Causes: poor fuel quality, bad tuning, high exhaust gas temperatures. The EJ cliché alongside the head gasket.
Symptoms: Misfires at idle after high-load driving, increasing oil consumption, blue smoke - !! Rod Bearing Failure from 120,000 km
Class action for 2012-2017 WRX/STI: extended warranty to 8 years/100k miles. Oil starvation from boxer sloshing or neglected oil level as primary cause.
Symptoms: Knocking noise, oil pressure warning, metal particles in oil - !! Oil Pickup Tube Crack from 130,000 km
Identical problem to EJ205: brazed joint cracks from vibration. No recall despite known issue since 1996.
Symptoms: Sudden oil pressure drop, engine noise, oil pressure warning light
+ 7 more engine weaknesses + vehicle weaknesses
Vehicle Weaknesses
| Weakness | Cost | |
|---|---|---|
| Rear Wheel Bearing Fails Early Known BL/BP issue: rear wheel bearings fail prematurely. Multiple failures on the same vehicle documented. Subaru extended the warranty. Root cause: no seal between hub and axle stub. Symptoms: Humming from rear increasing with speed, popping sounds, uneven tire wear from 70,000 km | Medium |
Top Reported Issues
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Known Problems and Issues +
A total of 23 weaknesses have been documented for the Subaru Outback BP (2005–2009) — 19 engine-related and 4 vehicle-related. Typical issues affect Suspension, Brakes, Rust, Interior.
Outback (EJ253, 2005–2009) — Be Careful: Head gasket — external oil and coolant leak, Timing belt snap — interference engine, Excessive oil consumption — stuck oil control rings. Power: 175 PS.
Outback (EJ255, 2005–2009) — Be Careful: Ringland Failure — Piston Breakage, Rod Bearing Failure, Oil Pickup Tube Crack. Power: 250 PS.
What to watch out for with the Subaru Outback? See the detailed listing of all engine and vehicle weaknesses in the sections above.
Frequently Asked Questions
What problems and weaknesses does the Subaru Outback BP have? +
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Last updated: February 2026 · All information without guarantee