The 2005 Legacy with the 2.5L naturally aspirated H4 is known for catastrophic head gasket failures and transmission oil cooler line corrosion. These are not 'if' but 'when' issues that define ownership cost.
External Head Gasket Failure (Coolant Leaks)
Common · high severity
Typical onset: 90,000-150,000 mi
Symptoms: Coolant seepage from cylinder head seams, visible as dried white/green residue, Sweet coolant smell after driving, especially on cold starts, Slow coolant loss requiring top-offs every few weeks, Oil and coolant mixing is rare on external failures but catastrophic when it happens
Fix: Replace both head gaskets, resurface heads, new timing components, water pump, all coolant hoses. 12-16 hours labor. Do NOT patch—it will fail again within 20k miles.
Estimated cost: $2,000-3,200
Transmission Oil Cooler Line Corrosion and Failure
Common · high severity
Typical onset: 80,000-130,000 mi
Symptoms: ATF puddles under engine bay, often near radiator, Rapid transmission fluid loss leading to slipping or no movement, Rust perforation on steel lines running to radiator-mounted cooler, Sudden loss of all gears if line ruptures while driving
Fix: Replace both transmission cooler lines (they rust as a pair). 2-3 hours labor. Flush transmission if contamination suspected. This is a tow-home failure if it lets go on the highway.
Estimated cost: $400-700
Rear Wheel Bearing Failure
Occasional · medium severity
Typical onset: 100,000-160,000 mi
Symptoms: Grinding or humming from rear that increases with speed, ABS/VDC warning lights if sensor damaged by failing bearing, Vibration through seat at highway speeds
Fix: Press out old bearing, press in new hub assembly. 2-3 hours per side labor. Bearings tend to go one at a time, plan for the other within 30k miles.
Estimated cost: $350-550 per side
Front Axle CV Boot Tears and Axle Failure
Occasional · medium severity
Typical onset: 70,000-120,000 mi
Symptoms: Clicking or popping when turning at low speeds, Grease splatter on inner wheel well or suspension components, Vibration during acceleration if joint is worn
Fix: If caught early (torn boot, no clicking), repack and re-boot for 1.5 hours labor. If clicking, replace entire axle (2 hours). Most shops just replace the axle—cheaper than labor to repack.
Estimated cost: $250-450 per side for axle replacement
Ignition Switch Failure (Recall 09V342000)
Occasional · high severity
Symptoms: Intermittent no-start, dash lights flicker or stay dark, Key won't turn or gets stuck in ignition, Electrical gremlins—windows, radio, gauges cutting out randomly, Vehicle stalls while driving in worst cases
Fix: Replace ignition switch assembly. Recall covers some VINs, but many owners report being outside recall scope. 1.5-2 hours labor if paying out of pocket.
Estimated cost: $0 if recall applies, $250-400 if not
Brake Line Rust and Failure (Particularly Salt-Belt Cars)
Occasional · high severity
Typical onset: 120,000+ mi or 10+ years in rust belt
Symptoms: Soft or spongy brake pedal that doesn't firm up with pumping, Brake fluid leaking at line junctions or along frame rails, Catastrophic brake loss if line ruptures
Fix: Replace corroded sections or full brake line set if multiple lines are compromised. 4-6 hours labor for full replacement. Inspect annually if car has seen road salt.
Estimated cost: $500-1,200 depending on extent
Engine Mount (Especially Transmission Mount) Deterioration
Common · low severity
Typical onset: 80,000-130,000 mi
Symptoms: Clunk when shifting from Park to Drive or Reverse, Excessive vibration at idle, smooths out at higher RPM, Engine rocks visibly when revved in Park
Fix: Replace transmission mount (most common failure) or all four engine mounts if deteriorated. Transmission mount alone is 1-1.5 hours labor.
Estimated cost: $150-300 for trans mount, $600-900 for all mounts
Owner tips
Budget $3,000-4,000 for head gaskets if buying one that hasn't had them done—it's not optional on this engine.
Inspect transmission cooler lines annually; a $15 can of rust converter and some wrapping can buy you time.
Use Subaru blue coolant (not universal green) and change every 30k miles to slow head gasket degradation.
If the oil looks like a chocolate milkshake, the engine is likely toast—internal HG failure means machine work or short block.
Buy only if head gaskets are already done with documentation and the price reflects $1,500-2,000 in deferred maintenance—these are reliable IF you survive the gasket lottery.
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.
AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE · 15V323000
2015-05-28 · EA15001
Subaru of America, Inc. (Subaru) is recalling certain model year 2003-2004 Subaru Baja vehicles manufactured January 22, 2003, to July 21, 2004, 2004-2005 Impreza vehicles manufactured January 28, 2003, to May 31, 2005, 2003-2008 Subaru Legacy vehicles manufactured January 22, 2003, to May 2, 2008, 2003-2008 Subaru Outback vehicles manufactured February 18, 2003, to May 5, 2008, and 2005 Saab 9-2x vehicles manufactured February 11, 2004, to March 17, 2005. The affected vehicles are equipped with a passenger side frontal air bag that may be susceptible to moisture intrusion which, over time, could cause the inflator to rupture upon its deployment.
Consequence: In the event of a crash necessitating deployment of the passenger's frontal air bag, the inflator could rupture with metal fragments striking the vehicle occupants potentially resulting in serious injury or death.
Remedy: Subaru will notify their owners and General Motors will notify Saab owners. Dealers will replace the passenger air bag inflator, free of charge. The Subaru recall began on June 17, 2015. Owners may contact Subaru customer service at 1-800-782-2783. The Saab recall began on July 27, 2015. Owners of Saab vehicles may call 1-800-955-9007. Subaru's number for this recall is WQR-53. Note: The recall completely supersedes recall 14V-399 (WQL-48) and partially supersedes recall 14V-763 (WQP-51) in that model year 2004 through 2005 Subaru Impreza and model year 2005 Saab 9-2x vehicles are now only part of this campaign. Note: On December 18, 2015 Subaru informed NHTSA of an expansion of this recall to include certain model year 2003-2004 Subaru Baja, 2003-2008 Subaru Legacy and 2003-2008 Subaru Outback vehicles.
AIR BAGS · 14V763000
2014-12-01 · PE14016
Subaru of America, Inc. (Subaru) is recalling certain model year 2003-2004 Legacy and Outback vehicles, and 2003-2005 Baja vehicles sold, or ever registered, in geographic locations associated with high absolute humidity. Specifically, vehicles sold, or ever registered, in Puerto Rico, Hawaii, the U.S. Virgin Islands, Guam, Saipan, American Samoa, Florida and adjacent counties in southern Georgia, as well as the coastal areas of Alabama, Louisiana, Mississippi and Texas. Upon deployment of the passenger side frontal air bag, excessive internal pressure may cause the inflator to rupture.
Consequence: In the event of a crash necessitating deployment of the passengers frontal air bag, the inflator could rupture with metal fragments striking the vehicle occupants potentially resulting in serious injury or death.
Remedy: Subaru will notify their owners. Dealers will replace the passenger air bag inflator, free of charge. The recall began on January 15, 2015. Owners may contact Subaru at 1-800-782-2783. Subaru's number for this recall is WQP-51. Note: This recall supersedes recall 14V-471. This recall has been partially superseded by 15V-323. All 2005 model year Subaru Legacy and Outback vehicles will now be repaired under recall 15V-323.
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.
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:HOSES, LINES/PIPING, AND FITTINGS · 13V110000
2013-03-27
Subaru is recalling certain model year 2005-2009 Outback and Legacy vehicles manufactured from December 2003, through April 2009 and 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.
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 inspect the vehicles. If no brake fluid seepage is observed, the affected area 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 on May 30, 2013. Owners may contact Subaru at 1-800-782-2783. Subaru's recall campaign number is WQG-43.
AIR BAGS:SIDE/WINDOW · 04V274000
2004-06-09
THE LEFT AND RIGHT SIDE CURTAIN AIR BAGS IN CERTAIN VEHICLES INVOLVED IN THIS CAMPAIGN MAY NOT FULLY DEPLOY RAPIDLY ENOUGH WHEN ACTIVATED IN A SIDE IMPACT COLLISION. DURING A SIDE IMPACT TEST CONDUCTED BY THE INSURANCE INSTITUTE FOR HIGHWAY SAFETY (IIHS), THE TEST RESULTS INDICATED THAT THERE WAS A DIFFERENCE BETWEEN THE IIHS TEST RESULTS AND THE RESULT OF SIDE IMPACT TESTS CONDUCTED BY FHI.
Consequence: THIS MAY RESULT IN FAILURE TO PROVIDE THE INTENDED HEAD PROTECTION, INCREASING THE RISK OF INJURY TO A SEAT OCCUPANT.
Remedy: DEALERS WILL REPLACE THE LEFT AND RIGHT SIDE CURTAIN AIR BAG MODULES. THE RECALL BEGAN ON JUNE 11, 2004. OWNERS SHOULD CONTACT SUBARU AT 1-800-782-2783.
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