The 2009 Forester XT uses the EJ255 turbocharged boxer engine paired with a 4-speed automatic or 5-speed manual. Head gasket failures and turbo-related issues dominate the problem list, with transmission cooler line failures being a critical concern on automatics.
Head Gasket Failure (External Leaks)
Common · high severityTypical onset: 80,000-130,000 mi
Symptoms: Oil seepage from cylinder heads visible around engine block, Coolant smell from engine bay, Oil residue accumulating on exhaust manifolds, Gradual coolant loss without visible external puddles
Fix: Both head gaskets require replacement; includes timing belt/water pump service while engine is apart. 12-16 labor hours. Head resurfacing typically needed, adds 2-3 hours machine shop time.
Estimated cost: $2,800-4,200
Transmission Oil Cooler Line Failure
Common · high severityTypical onset: 70,000-110,000 mi
Symptoms: ATF pooling under vehicle front-center, Rapid transmission fluid loss, Transmission overheating warning, Pink fluid visible near radiator area
Fix: Steel cooler lines rot through where they route along subframe. Requires OEM replacement lines; aftermarket versions fail quickly. 3-4 labor hours including fluid replacement and system flush.
Estimated cost: $600-950
Turbocharger Failure / Oil Starvation
Occasional · high severityTypical onset: 100,000-150,000 mi
Symptoms: Blue smoke on acceleration, Whistling or grinding noise from turbo, Loss of boost pressure, Check engine light with underboost codes P0035/P0236, Excessive oil consumption
Fix: Turbo bearing failure often caused by oil feed line coking or banjo bolt filter clogging. Replacement requires OEM or quality aftermarket turbo, oil feed/return line cleaning, and often leads to discovering ring land failures. 8-10 labor hours if engine internals are sound.
Estimated cost: $2,200-3,800
Piston Ring Land Failure
Occasional · high severityTypical onset: 90,000-140,000 mi
Symptoms: Excessive oil consumption (1 quart per 1,000 miles or worse), White/blue smoke on cold start, Misfires under boost, Compression loss on one or more cylinders, Rattling noise from engine under load
Fix: EJ255 pistons crack between top ring and piston crown, especially cylinder #4. Requires engine removal and short block replacement or full rebuild with forged pistons. 20-25 labor hours minimum.
Estimated cost: $5,500-8,500
Banjo Bolt Filter Clogging (Turbo Oil Feed)
Common · medium severityTypical onset: 60,000-100,000 mi
Symptoms: Turbo whistle or whine increases over time, Sluggish boost response, Oil residue around turbo oil feed connection, Early-stage turbo bearing noise
Fix: Tiny filter screen in banjo bolt clogs with carbon deposits, starving turbo of oil. Preventive removal of filter screen and line cleaning during oil changes extends turbo life. 1.5 labor hours if caught early.
Estimated cost: $150-300
Transmission Mount Failure
Common · low severityTypical onset: 70,000-120,000 mi
Symptoms: Clunking when shifting from Park to Drive, Excessive driveline vibration at idle, Visible engine/transmission movement during acceleration, Thumping over bumps from underneath
Fix: Rear transmission mount deteriorates and separates. Quick replacement job. 1.5-2 labor hours.
Estimated cost: $250-450
Fuel Filter / Fuel Pump Assembly Clogging
Occasional · medium severityTypical onset: 100,000+ mi
Symptoms: Hesitation under acceleration, Stumbling at high RPM, Hard starting when hot, Fuel trims running extremely rich or lean, Check engine light for lean codes
Fix: In-tank fuel pump basket screen clogs; often caused by debris from deteriorating tank lining. Requires fuel tank drop and pump assembly replacement. 3-4 labor hours.
Estimated cost: $600-1,100
Buy only with comprehensive service records showing religious oil changes and proactive cooling system maintenance; budget $3,000-5,000 for likely head gasket or turbo work within first 30,000 miles of ownership.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.