The 2012 WRX STI is a high-strung performance machine built around the legendary EJ257 boxer engine. It's bulletproof when maintained religiously, but becomes expensive quickly when abused or neglected—and many have been driven hard.
EJ257 Ringland Failure (Piston #4)
Occasional · high severity
Typical onset: 60,000-100,000 mi
Symptoms: misfires on cylinder 4, loss of compression, white/blue smoke under boost, check engine light with P0304 code, oil consumption increases dramatically
Fix: Complete engine rebuild or replacement. Requires removing engine, machining block, replacing pistons with forged units, new rings, bearings, head work. 25-35 labor hours. Most opt for built shortblock and upgrade while they're in there.
Estimated cost: $6,000-12,000
Turbocharger Failure (IHI VF48)
Common · high severity
Typical onset: 80,000-120,000 mi
Symptoms: blue smoke on startup or acceleration, whining or grinding noise from turbo, oil in intercooler piping, loss of boost pressure, P0299 underboost code
Fix: Replace turbocharger assembly. Turbo removal requires dropping the engine or extensive top-side disassembly. 8-12 labor hours. Critical to diagnose why it failed—often oil starvation from neglected changes or banjo filter clogging. Always replace oil feed/return lines.
Estimated cost: $2,500-4,000
Transmission Synchro Wear (1st and 2nd Gear)
Common · medium severity
Typical onset: 70,000-110,000 mi
Symptoms: grinding when shifting into 1st or 2nd, difficulty engaging gears when cold, gear pop-out under load, notchy shifting even with fresh fluid
Fix: Transmission rebuild with new synchros, shift forks inspection, bearings as needed. Trans must come out—8-10 hours removal/install, plus internal rebuild time. Many upgrade to STI 6-speed refresh kit while in there.
Estimated cost: $3,000-5,500
Timing Belt and Water Pump (Interference Engine)
Common · high severity
Typical onset: 105,000 mi or 105 months
Symptoms: this is preventive—if belt breaks, you have bent valves and destroyed engine, squealing from belts area if idler bearings failing
Fix: Replace timing belt, all idlers, tensioner, water pump, camshaft and crankshaft seals as preventive service. Not if-but-when maintenance. 6-8 labor hours. Skip this and you're looking at head removal and valve work minimum.
Estimated cost: $1,200-1,800
Transmission Mount Failure (Pitch Stop Mount)
Common · low severity
Typical onset: 50,000-80,000 mi
Symptoms: clunking during hard acceleration or deceleration, excessive engine/trans movement felt through shifter, vibration at idle in gear
Fix: Replace rear transmission mount (pitch stop). Simple job, 1-2 hours. Most owners upgrade to stiffer aftermarket units which last longer but increase NVH slightly.
Estimated cost: $200-400
Banjo Bolt Filter Clogging (Turbo Oil Feed)
Occasional · high severity
Typical onset: any mileage if oil changes neglected
Symptoms: turbo failure due to oil starvation, smoking turbo, turbo bearing noise, often discovered post-turbo-failure during diagnosis
Fix: Preventive removal and inspection of banjo bolt filters during oil changes, especially if car has unknown history. 0.5 hours when done proactively. Many techs remove them entirely after inspection if debris found, ensuring adequate oil flow. Reactive fix means you're already replacing the turbo.
Estimated cost: $50-100 preventive / $2,500+ if turbo already damaged
AVCS Cam Position Sensor Failures
Occasional · medium severity
Typical onset: 80,000-130,000 mi
Symptoms: check engine light with P0011 or P0021 codes, rough idle when warm, hesitation or bucking under light throttle, reduced power
Fix: Replace intake and/or exhaust cam position sensors. Access isn't terrible on these—2-3 hours. Sometimes related to oil control valve failures as well, which should be tested during diagnosis.
Estimated cost: $400-700
Owner tips
Change oil every 3,000-3,500 miles with quality synthetic—this engine runs hot and sees high loads. Extended intervals kill turbos and cause ringland failures.
Always warm up fully before boost (oil temp 180°F minimum). These engines are heat-cycled to death by short trips and cold-engine thrashing.
Inspect banjo bolt screens at every oil change if car has 60k+ miles or unknown service history.
Do timing belt religiously at 105k or 8-9 years—interference engine means skipping this turns a $1,500 job into a $8,000+ disaster.
Get a pre-purchase compression and leak-down test—modified or abused examples hide expensive internal damage until it's your problem.
Buy one only if you can verify meticulous maintenance history and accept that performance car ownership means expensive, frequent service—this is not a Corolla.
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.
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AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE · 20V001000
2020-01-02 · EA15001
Subaru of America, Inc. (Subaru) is recalling certain 2009-2013 Forester, 2003-2006 Baja, 2004-2011 Impreza, 2004-2014 WRX (STI included), 2003-2014 Legacy and Outback, and 2005-2006 Saab 9-2X vehicles originally sold, or ever registered, in the states of Alabama, California, Florida, Georgia, Hawaii, Louisiana, Mississippi, South Carolina, Texas, Puerto Rico, American Samoa, Guam, the Northern Mariana Islands (Saipan), and the U.S. Virgin Islands or "Zone A."
These vehicles had their passenger frontal air bag inflators previously replaced under a prior recall using inflators of the same design. The inflators may explode due to propellant degradation occurring after long-term exposure to high absolute humidity, temperature and temperature cycling.
Consequence: An inflator explosion may result in sharp metal fragments striking the driver or other occupants resulting in serious injury or death.
Remedy: Subaru will notify their owners. General Motors will notify Saab owners. Dealers will replace the passenger air bag inflators with alternate inflators, free of charge. The recall began January 7, 2020. Subaru Owners may contact Subaru customer service at 1-844-373-6614. Saab owners may contact the Saab Customer Assistance Center at 1-800-955-9007. Subaru's number for this recall is TKA-20.
AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE · 20V002000
2020-01-02 · EA15001
Subaru of America, Inc. (Subaru) is recalling certain 2009-2013 Forester, 2003-2006 Baja, 2004-2011 Impreza, 2004-2014 WRX (including STI), 2003-2014 Legacy and Outback, and 2006 Saab 9-2X vehicles originally sold, or ever registered, in the states of Arizona, Arkansas, Delaware, District of Columbia, Illinois, Indiana, Kansas, Kentucky, Maryland, Missouri, Nebraska, Nevada, New Jersey, New Mexico, North Carolina, Ohio, Oklahoma, Pennsylvania, Tennessee, Virginia, and West Virginia or "Zone B."
These vehicles had their passenger frontal air bag inflators previously replaced under a prior recall using inflators of the same design. The inflators may explode due to propellant degradation occurring after long-term exposure to high absolute humidity, temperature and temperature cycling.
Consequence: An inflator explosion may result in sharp metal fragments striking the driver or other occupants resulting in serious injury or death.
Remedy: Subaru will notify their owners. General Motors will notify Saab owners. Dealers will replace the passenger air bag inflators, free of charge. The recall began January 7, 2020. Subaru owners may contact Subaru customer service at 1-844-373-6614. Saab owners may contact the Saab Customer Assistance Center at 1-800-955-9007. Subaru's number for this recall is TKB-20.
AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE · 20V003000
2020-01-02 · EA15001
Subaru of America, Inc. (Subaru) is recalling certain 2009-2013 Forester, 2003-2006 Baja, 2004-2011 Impreza, 2004-2014 WRX (including STI), 2003-2014 Legacy and Outback, and 2005-2006 Saab 9-2X vehicles originally sold, or ever registered, in the states of Alaska, Colorado, Connecticut, Idaho, Iowa, Maine, Massachusetts, Michigan, Minnesota, Montana, New Hampshire, New York, North Dakota, Oregon, Rhode Island, South Dakota, Utah, Vermont, Washington, Wisconsin, and Wyoming or "Zone C."
These vehicles had their passenger frontal air bag inflators previously replaced under a prior recall using inflators of the same design. The inflators may explode due to propellant degradation occurring after long-term exposure to high absolute humidity, temperature and temperature cycling.
Consequence: An inflator explosion may result in sharp metal fragments striking the driver or other occupants resulting in serious injury or death.
Remedy: Subaru will notify their owners. General Motors will notify Saab owners. Dealers will replace the passenger air bag inflators, free of charge. The recall began January 7, 2020. Subaru owners may contact Subaru customer service at 1-844-373-6614. Saab owners may contact the Saab Customer Assistance Center at 1-800-955-9007. Subaru's number for this recall is TKC-20.
ELECTRICAL SYSTEM:IGNITION:SWITCH · 19V297000
2019-04-11
Subaru of America, Inc. (Subaru) is recalling certain 2009-2013 Forester vehicles, 2008-2011 Impreza vehicles, 2008-2014 WRX vehicles, 2005-2014 Legacy vehicles, 2005-2014 Outback vehicles and 2006-2008 Tribeca vehicles equipped with a mechanical key ignition switch installed as a replacement part. The ball spring inside the switch may break, reducing the strength of the ignition switch. If this occurs, the weight on the key ring and certain road conditions could cause the ignition switch to move out of the run position to the accessory position, turning off the engine.
Consequence: The engine turning off unexpectedly can increase the risk of a crash. If a crash occurs under this condition, the air bag may not deploy, increasing the risk of injury.
Remedy: Subaru will notify owners, and dealers will inspect the ignition switch, replacing the ignition switch, if necessary, free of charge. The recall began May 10, 2019. Owners may contact Subaru customer service at 1-844-373-6614. Subaru's number for this recall is WUF-91.
EXTERIOR LIGHTING:BRAKE LIGHTS:SWITCH · 19V149000
2019-02-28
Subaru of America, Inc. (Subaru) is recalling certain 2014-2016 Forester, 2008-2016 Impreza sedans, 2012-2016 Impreza station wagons, 2008-2014 WRX sedans (including STI), and 2013-2017 Crosstrek vehicles. Exposure to certain contaminants may cause the brake light switch to malfunction, preventing the brake lights from illuminating and also preventing keyless ignition vehicles from starting and CVT/automatic transmissions from being able to be shifted out of Park.
Consequence: Brake lights that do not illuminate properly will not alert other drivers that the vehicle is slowing or stopping, increasing the risk of crash.
Remedy: Subaru will notify owners, and dealers will replace the brake light switch, free of charge. The recall began April 15, 2019. Owners may contact Subaru customer service at 1-844-373-6614. Subaru's number for this recall is WUE-90.
AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE · 19V007000
2019-01-09 · EA15001
Subaru of America, Inc. (Subaru) is recalling certain 2010-2013 Forester, 2010-2014 Tribeca, WRX, Outback, Legacy, and 2010-2011 Impreza vehicles sold, or ever registered, in the states of Alabama, California, Florida, Georgia, Hawaii, Louisiana, Mississippi, South Carolina, Texas, Puerto Rico, American Samoa, Guam, the Northern Mariana Islands (Saipan), and the U.S. Virgin Islands.
These vehicles are equipped with certain air bag inflators assembled as part of the passenger frontal air bag modules used as original equipment or replacement equipment. In the event of a crash necessitating deployment of the passenger frontal air bag, these inflators may explode due to propellant degradation occurring after long-term exposure to absolute humidity and temperature cycling.
Consequence: An explosion of an inflator within the passenger frontal air bag module may result in sharp metal fragments striking the front seat passenger, driver or other occupants resulting in serious injury or death.
Remedy: Subaru has notified owners, and dealers will replace the front passenger air bag inflator, free of charge. The recall began January 25, 2019. Owners may contact Subaru customer service at 1-844-373-6614. Subaru's number for this recall is TKA-19.
AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE · 19V008000
2019-01-09 · EA15001
Subaru of America, Inc. (Subaru) is recalling certain 2010-2014 Tribeca, WRX, Outback, and Legacy vehicles, 2010-2011 Impreza vehicles and 2010-2013 Forester vehicles sold, or ever registered, in the states of Arizona, Arkansas, Delaware, District of Columbia, Illinois, Indiana, Kansas, Kentucky, Maryland, Missouri, Nebraska, Nevada, New Jersey, New Mexico, North Carolina, Ohio, Oklahoma, Pennsylvania, Tennessee, Virginia, and West Virginia.
These vehicles are equipped with certain air bag inflators assembled as part of the passenger frontal air bag modules used as original equipment or replacement equipment. In the event of a crash necessitating deployment of the passenger frontal air bag, these inflators may explode due to propellant degradation occurring after long-term exposure to absolute humidity and temperature cycling.
Consequence: An explosion of an inflator within the passenger frontal air bag module may result in sharp metal fragments striking the front seat passenger, driver or other occupants resulting in serious injury or death.
Remedy: Subaru is notifying owners, and dealers will replace the front passenger air bag inflator, free of charge. The recall began January 25, 2019. Owners may contact Subaru customer service at 1-844-373-6614. Subaru's number for this recall is TKB-19.
AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE · 19V009000
2019-01-09 · EA15001
Subaru of America, Inc. (Subaru) is recalling certain 2010-2014 Tribeca, WRX, Legacy and Outback vehicles, 2010-2011 Impreza vehicles and 2010-2013 Forester vehicles sold, or ever registered, in the states of Alaska, Colorado, Connecticut, Idaho, Iowa, Maine, Massachusetts, Michigan, Minnesota, Montana, New Hampshire, New York, North Dakota, Oregon, Rhode Island, South Dakota, Utah, Vermont, Washington, Wisconsin, and Wyoming.
These vehicles are equipped with certain air bag inflators assembled as part of the passenger frontal air bag modules used as original equipment or replacement equipment. In the event of a crash necessitating deployment of the passenger frontal air bag, these inflators may explode due to propellant degradation occurring after long-term exposure to absolute humidity and temperature cycling.
Consequence: An explosion of an inflator within the passenger frontal air bag module may result in sharp metal fragments striking the front seat passenger, driver or other occupants resulting in serious injury or death.
Remedy: Subaru is notifying owners, and dealers will replace the front passenger air bag inflator, free of charge. The recall began on January 25, 2019. Owners may contact Subaru customer service at 1-844-373-6614. Subaru's number for this recall is TKC-19.
AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE · 18V012000
2018-01-09 · EA15001
Subaru of America, Inc. (Subaru) is recalling certain 2009-2013 Legacy, Forester, Tribeca, WRX and Outback vehicles, and 2009-2011 Impreza vehicles sold, or ever registered, in the states of Alabama, California, Florida, Georgia, Hawaii, Louisiana, Mississippi, South Carolina, Texas, Puerto Rico, American Samoa, Guam, the Northern Mariana Islands (Saipan), and the U.S. Virgin Islands.
These vehicles are equipped with certain air bag inflators assembled as part of the passenger frontal air bag modules used as original equipment or replacement equipment. In the event of a crash necessitating deployment of the passenger frontal air bag, these inflators may explode due to propellant degradation occurring after long-term exposure to absolute humidity and temperature cycling.
Consequence: An explosion of an inflator within the passenger frontal air bag module may result in sharp metal fragments striking the front seat passenger, driver or other occupants resulting in serious injury or death.
Remedy: Subaru will notify owners, and dealers will replace the front passenger air bag inflator, free of charge. The recall began on February 9, 2018. Owners may contact Subaru customer service at 1-800-782-2783. Subaru's number for this recall is TKA-18.
AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE · 17V014000
2017-01-10 · EA15001
Subaru of America, Inc. (Subaru) is recalling certain 2005-2006 Subaru Baja, 2006-2011 Impreza (including WRX and STI models), 2006-2012 Tribeca, 2009-2012 Forester, Legacy, Outback, and 2012 WRX vehicles originally sold, or ever registered, in the states of Alabama, California, Florida, Georgia, Hawaii, Louisiana, Mississippi, South Carolina, Texas, Puerto Rico, American Samoa, Guam, the Northern Mariana Islands (Saipan), and the U.S. Virgin Islands.
These vehicles are equipped with certain air bag inflators assembled as part of the passenger frontal air bag modules, and used as original equipment or replacement equipment. In the event of a crash necessitating deployment of the front air bags, these inflators may rupture due to propellant degradation occurring after long-term exposure to absolute humidity and temperature cycling.
Consequence: An inflator rupture may result in metal fragments striking the vehicle occupants resulting in serious injury or death.
Remedy: Subaru will notify owners, and dealers will replace the front passenger air bag inflator, free of charge. The recall began March 6, 2017. Owners may contact Subaru customer service at 1-800-782-2783. Subaru's number for this recall is TKA-17.
SERVICE BRAKES, HYDRAULIC · 14V830000
2014-12-31
Subaru of America, Inc. (Subaru) is recalling certain model year 2008-2011 Impreza, 2008-2014 WRX and STI, and 2009-2013 Forester vehicles, currently, or formerly, registered in Connecticut, Delaware, Illinois, Indiana, Iowa, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, West Virginia, Wisconsin and the District of Columbia that were remedied under recall 14V-311 prior to December 23, 2014. The brake lines may experience brake line corrosion due to salt water splashing on the brake lines through a gap in the fuel tank protector.
Consequence: Brake fluid may leak due to the brake line corrosion and may result in longer distances being required to slow or stop the vehicle, increasing the risk of a crash.
Remedy: Subaru will notify owners, and dealers will apply an anti-corrosion wax to the four-way joint connector area of the brake line system, free of charge. The recall began on January 27, 2015. Owners may contact Subaru customer service at 1-800-782-2783. Subaru's number for this recall is WQQ-52. Notes: This recall is specific to affected Forester, Impreza, WRX, and STI customers who had their car remedied under NHTSA recall no. 14V-311 prior to December 23, 2014. Subaru has determined that this remedy was inadequate due to incomplete repair instructions provided to dealers. Affected Forester, Impreza, WRX, and STI vehicles that were not repaired under NHTSA recall no. 14V-311 prior to December 23, 2014 will continue to be processed under NHTSA recall no. 14V-311. Affected vehicles not currently, or formerly, registered in the salt belt states identified in this recall are eligible for repair, at no cost to the customer, upon request.
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:HOSES, LINES/PIPING, AND FITTINGS · 14V311000
2014-06-10
Subaru of America, Inc. (Subaru) is recalling certain model year 2005-2009 Outback and Legacy, 2008-2011 Impreza and 2008-2014 Impreza WRX/STI, and 2009-2013 Forester vehicles, currently, or formerly, registered in Connecticut, Delaware, Illinois, Indiana, Iowa, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, West Virginia, Wisconsin and the District of Columbia. Salt water could splash on the brake lines through a gap in the fuel tank protector, resulting in excessive corrosion of the brake lines.
Note that affected vehicles not currently, or formerly registered, in the salt belt states identified above are eligible for repair, at no cost to the customer, upon request.
Consequence: Brake line corrosion may result in brake fluid leakage. Fluid leakage may result in longer distances being required to slow or stop the vehicle, increasing the risk of a crash.
Remedy: Subaru will notify owners, and dealers will test the brake system by depressing the brake pedal and inspecting for brake fluid leaks. If no brake fluid seepage is observed, the affected areas will be rustproofed with anti-corrosion wax. If brake fluid seepage is observed, the brake lines will be replaced followed by rustproofing with anti-corrosion wax. These services will be performed free of charge. The recall began July 2014 and second notifications will run through November 2014. Owners may contact Subaru at 1-800-782-2783. Subaru's recall campaign number is WQK-47. Note: This recall supersedes recall 13V-110 which applied to certain 2005-2009 Legacy/Outback vehicles. Vehicles that were remedied under the previous campaign still need additional areas rust-proofed.
Performance
Horsepower
305hp
Torque
290lb-ft
0–60 mph
4.9sec
Quarter mile
13.5sec
Top speed
155mph
Capability & size
Curb weight
3,384lb
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 2012 Subaru WRX STI 2.5L H4 Turbo EJ257 Gen2 and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years.