Which parts fail
Components named in complaints (engine, cooling system, oil leaks, timing chain, exhaust).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2010 Subaru Outback owners, lightly cleaned up (personal details are redacted by NHTSA).
This car is a very well-maintained, low-use vehicle with regular oil changes and routine maintenance performed on schedule. Early in this drive, I noticed an unusual hissing sound as I approached a stop. When I tried to brake, I realized my brakes didn't seem to be responding. I pressed the brake pedal harder and realized that with 50-100 pounds of pressure (guess), I could slow the car down. As I came to a stop, the engine died. I restarted the car, and it died again immediately. After the following restart, I realized I could manually keep the RPM up in neutral while at stops, and press with significant force to get the car to stop. Had I not been comfortable two foot driving or understood the issue, this surely would have resulted in a crash of some sort. The car indicated a check engine light, loss of traction control, a flashing BRAKE light, and a flashing cruise control light. …
I see many many complaints about the head gasket material Subaru used was not compatible with the very fluid that is needed for the cars engine to not blow up.....coolant. Subaru knows the head gasket material is ruined by the coolant it needs but has left us consumers to deal with a very costly, devastating issue such as what I just want through and am still in the middle of a fight with dealer who sold me a car for 10995 and I had it 2 weeks....coolant blew everywhere had to fight with dealership to get them to tow it. I was yelled at, hung up on, calls not returned all while I have no car no way to work and as a [redacted] and a child to raise, I do not have options and live by a thread and paycheck to paycheck.....It should not be allowed that Subaru doesn't fix that since it is a manufacturing defect that they made it incompatible with the coolant it needs.
Total engine failure at just 75k miles. Barely driven, maintenance schedule always kept up to date, out of nowhere engine stopped and I was told the oil was completely empty. They were unable to resolve by adding oil. Also, transmission light has been on for 3+ years. Have been told by every repair shop who has checked this that it's just a glitch in the electrical system and the transmission is fine. A few weeks prior to engine failure, the car began to have trouble accelerating and made a sort of "race car" sound. Barely could go past 40 mph without slamming on gas. Finally, doors have randomly decided to stop locking and unlocking while using key fob. Batteries have been replaced. Some doors work, some do not (namely, the driver side door). Other misc electrical issues like USB failure.
Vehicle has an automatic transmission and it stalls when stopping. There is no warning light on the dash. This happens more frequently when the vehicle is warm, in early operation it may only hesitate or run rough while stopping. A warm a stop is more likely to stall the vehicle than a slow stop. Hard braking at operating temperature will stall the vehicle without fail. This has been happening since I bought it and it occurs with each drive every day.
All instrument and waning lights illuminated and the engine shut down while driving. Took to the Subaru dealer repair shop and the vehicle was diagnosed with a head gasket leak that caused oil to mix with the coolant. This is a low mileage vehicle, 67,597 miles, that has been maintained by Subaru certified mechanics.
Traveling on icy road approx. 20mph or less in 2010 Outback 3.6 ltd. Very accustomed to driving severe mountain winter conditions & 8th Subaru among family members. Seatbelt, shoulder restraint in place on driver. Oncoming driver in mid-size to large truck lost control at high speed, crossed center line and impacted Subaru head-on, offset to left side of Outback & 2010 Outback was totaled. Subaru airbags did not deploy. Impact into front left side, crumpled hood up to windshield, which shattered. His hood was inside Subaru engine compartment, remained under Subaru hood along with other parts of his vehicle after vehicles were towed. Subaru radiator was pushed in at approx 45 degree angle, left wheel bent inwards, left front bumper gone back to tire and much more damage. His airbags deployed and Subaru's did not. …
We bought our car in 2010 its a Subaru Outback. There has always been an issue with a loss of power. The dealership at the time said it was caused by excessive carbon build up on the pistons. Its now 2016 and the car will stutter and shut off when you are braking at red lights. To try to beat the stutter and stall, I find myself having to ease off the brakes and try to reapply my brakes to see if it won't shut off. I've avoid many accidents but one of these days I won't be so lucky. I feel a rear end accident is coming. This stutter and stall happens any time during the day and in any weather. This morning there was no issue, this afternoon there might be. Usually once the car stutters and stalls the problem goes away for the day. I read some other complaints on nhsta and they are reporting their similar issue as it being a possible torque converter problem. …
When driving and approaching a traffic light the car will begin to stutter as if there is a clog in the system. Then it will shut off. I contacted Subaru regarding the issue when we first had the car because there was always a loss of power. Our model is the Outback 2010. They inspected and said it was a carbon build up in the pistons that would cause this issue. There hasn't been any recalls or Subaru notices about this. Now while driving and coming to a stop the car just turns off. On your site nhsta some other customers have been saying that it could also be a bad torque converter. Either way this issue could cause serious accident if not dealt with. The stutter and shutting off happens any time of the day and cold or hot weather it doesn't matter. Some days it happens more often the others and usually after a few times of shutting off the problem does stop for remainder of the day.
Tl* the contact owns a 2010 Subaru Outback. While driving various speeds and depressing the brake pedal, the vehicle stalled without warning. The vehicle was able to restart and drive normally, but the failure recurred. The contact stated that the failure occurred intermittently when the brake pedal was depressed. The vehicle was taken to an independent mechanic who diagnosed that the transmission needed to be replaced. The contact called heritage Subaru catonsville at [phone] (located at 6624 baltimore national pike, catonsville, md 21228) and was informed to schedule a diagnostic appointment. The vehicle was not taken to a dealer. The vehicle was not repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 129,204. Consumer stated dealer fixed the transmission.
My cooling system does not work correctly, we have changed the radiator twice and the thermostat twice. I have taken it to Subaru of cherry hill and also to Subaru of jax where my father in law is a senior master tech. My car has everyone baffled. Everything in my cooling system backs up into my overflow and than I lose all my coolant. I see there was a recall in 2010 for my year Outback manufactured between July 31 to dec 2009 and my car falls in those date ranges but was never including in this cooling system recall. I have contacted Subaru of America and they said there is nothing they can do for me. The issue only happens when driving on both city streets and highways. Bc of the issue my car has just shut down on me luckily it was when I was pulling into parking lots and not highways.
Related recalls
Engine and engine cooling › Cooling system › Hoses/lines/piping/fittings
Subaru is recalling certain model year 2010 outback and legacy passenger vehicles manufactured from July 31 through December 1, 2009. A crack or split can occur in the CVT cooler hose resulting in a fluid leak.
Remedy: Subaru will notify owners and dealers will replace any affected cooler hoses free of charge. The safety recall began on June 8, 2010. Owners May contact Subaru at 1-800-subaru3 (1-800-782-2783).
Engine complaints in other Outback years
Frequently asked questions
How common are engine problems on the 2010 Subaru Outback?
NHTSA has 67 complaints about the engine & cooling of the 2010 Subaru Outback, 19% of the model year's 360 complaints. The component named most often is engine (15 mentions).
Is there a recall for 2010 Subaru Outback engine problems?
Yes — NHTSA recall 10V-196 (hoses/lines/piping/fittings, May 7, 2010). Recall repairs are free at authorized dealers.
At what mileage do 2010 Subaru Outback engine problems start?
Half of the complaints with a recorded mileage happened before about 67,000 miles, and 42% before 25,000 miles.
Is it dangerous?
Owners linked 2 crashes, 0 fires and 1 injury to engine & cooling problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.