The EJ25 head gasket is the defining Subaru reliability problem of the last twenty years. If you've ever owned an Outback, Forester, or Legacy from this era, you either dealt with it, sold the car before you had to deal with it, or got lucky. Subaru changed the head gasket design at least twice during the affected production run trying to fix the issue, and partial fixes is what they got — head gaskets that fail later instead of sooner. The mechanical reason this engine fails head gaskets is that it's a horizontally-opposed flat-four, which means the heads sit on the sides of the engine instead of the top, and they thermally cycle differently than the heads on a conventional V or inline engine. The gasket material was asked to do a job that was harder than what most engines need, and the early-2000s gasket design wasn't up to it. Subaru tried multi-layer steel updates, redesigned coolant flow paths, and a cooling system conditioner additive that's literally pellets of ground walnut shell mixed with stop-leak. The conditioner trick works for some cars and doesn't work for others. The repair, when it's needed, is a $1,800-$3,000 job at an independent shop, more at the dealer. If you do it yourself it's a long weekend with the engine half pulled out, and you'll need a torque wrench and a clean workspace. The cars are generally durable apart from this. Owners who do the head gaskets and stay on top of timing belt service routinely get 200,000-300,000 miles out of an EJ25. Owners who ignore the head gasket warning signs — coolant smell, slowly disappearing reservoir, white residue under the oil cap — end up replacing the engine.
Subaru EJ25 (head gasket era) problems
3,886 owner complaints filed with NHTSA across 27 vehicle applications. 15 active recall campaigns.
Known issues
- External head gasket leak (oil and coolant seeping at the head/block joint)
- Internal head gasket failure (combustion gases pressurizing cooling system)
- Overheating from coolant loss leading to catastrophic engine damage
- Multiple head gasket service bulletins, no formal recall
- Cooling system conditioner additive issued as interim fix in mid-2000s
Problem categories Aggregated across all 27 affected vehicles
Affected vehicles Top 25 by complaint volume
Recent owner reports 8 most recent across the family
Coolant leak, steering power fluid leak, break pad leak, gasoline line leak, seat heater, clicking noise after turning off car, leaking seats and rear view mirror also leaking, steering wheel expanding due to possible air bag, heater and ac vents lose and also chemical smell/gas/coolant coming from…
TL* THE CONTACT OWNS A 2011 SUBARU OUTBACK. WHEN THE CONTACT DEPRESSED THE BRAKE PEDAL TO STOP THE VEHICLE, IT SUDDENLY SHUT OFF. AFTER RESTARTING THE ENGINE, THE VEHICLE OPERATED NORMALLY. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHO DIAGNOSED THAT THE TORQUE CONVERTER WAS FAULTY AND…
WHILE DRIVING ON 95 INTERSTATE I NOTICE A CRACK SOUND AND THE LEFT SIDE OF MY DRIVER'S SEAT COLLAPSED, RATHER DANGEROUS! THIS IS VERY UNCOMFORTABLE ESPECIALLY SINCE I HAVE SCOLIOSIS. I AM SITTING AT A DIAGONAL POSITION WHILE DRIVING AND THIS IS VERY DISTRACTING AND UNCOMFORTABLE. . I DO NOT HAVE…
CAR WAS PURCHASED IN SEPTEMBER 2014. THIS WAS MY FIRST TIME DRIVING THIS CAR IN WET, SNOWY DRIVING CONDITIONS. I HAD 5 PASSENGERS AND TWICE WE HAD THE REAR END OF THE CAR KIND OF BREAK LOOSE. IT FELT LIKE IT WAS SWINGING TO THE SIDE. IT SCARED ME AND THE PASSENGERS IN THE CAR. I HAVE NOT…
THE CLUTCH BRACKET ON THE FIREWALL HAS ONLY 4 SMALL TACK WELDS FROM THE FACTORY. THIS BRACKET TAKES ALL THE FORCE OF YOUR LEG PUSHING IN THE CLUTCH EVERY TIME YOU CHANGE A GEAR. IT APPEARS TO BE VERY COMMON ON THE SUBARU WRX STI FOR THESE SMALL TACKS TO BREAK AWAY FROM THE FIREWALL AND CAUSE…
THIS IS THE 5TH SUBARU I HAVE OWNED IN MY LIFE AND HAVE NOT HAD ANY PROBLEMS WITH ANY OF THEM WITH STABILITY IN SNOW AND ICE. I AM A PROFESSIONAL DRIVER AND HAVE DRIVEN IN ALL WEATHER CONDITIONS IN 2 WHEEL DRIVE VEHICLES AND 4. I PURCHASE THIS CAR IN JUNE OF 2012 AND ALWAYS FELT THAT IT WAS NOT…
Common questions
What vehicles use the Subaru EJ25 (head gasket era)?
The Subaru EJ25 (head gasket era) was used across 27 model-year combinations from 1999-2011. The most-affected applications are listed in ranked order on this page. Each entry links to the full reliability profile for that specific year/model combination.
What are the most common problems with the EJ25?
The dominant complaint patterns are: external head gasket leak (oil and coolant seeping at the head/block joint); internal head gasket failure (combustion gases pressurizing cooling system); overheating from coolant loss leading to catastrophic engine damage. Across all affected vehicles in our database, 3,886 owner complaints have been filed with NHTSA, plus 15 active recall campaigns.
How serious are the EJ25 problems?
Severity varies by model and year. Across the family, NHTSA records show 39 crash-related complaints, 10 fire incidents, 27 injuries, and 1 reported death. Critical recalls: 6. The specific severity for any one vehicle depends on the failure mode that vehicle was sold with.
Should I avoid vehicles with the EJ25?
Not automatically. The complaint data points to specific failure patterns that are well-understood, and many of them have known fixes — sometimes covered by extended warranty, sometimes by class-action settlement, sometimes by aftermarket service procedures. The right call depends on the specific vehicle, its maintenance history, and whether the known issues have been addressed already. Read the editorial above and click into the specific vehicle you're considering for the full picture.
Is an extended warranty worth it on a vehicle with the EJ25?
On engines with documented expensive failure modes, an extended service contract can pay for itself in one repair. Average independent-shop repair on an engine of this scope runs $2,500-$8,000 depending on what fails. A quality service contract is $1,800-$3,500 over 3 years. The math depends on the specific vehicle's complaint pattern, age, and miles. Use the calculator on the specific vehicle's page for a real estimate.
The good news on this one is that the failure mode is well-understood and the fix is well-understood. Independent Subaru specialists in every region know this engine intimately. If you own one of these, build the relationship with a good Subaru shop before you need them, not after. The cars reward owners who plan for the head gasket job before it becomes an emergency.