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 2015 Subaru Outback owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owned a 2015 Subaru Outback. The contact stated that while driving at 60 MPH, he was alerted by another driver that the vehicle was smoking and flames were coming from under the vehicle. The contact stated that warning lights flashed off and on. The contact stated that he pulled over, exited the vehicle, and saw flames coming from underneath the vehicle before it was engulfed in flames and exploded. The contact stated that he sustained minor burns on his hands from the steering wheel however, medical attention was not required. The fire was extinguished by the fire department. A fire department report was filed. The vehicle was towed to a junkyard as it was deemed a total loss. The manufacturer was notified of the failure and a field technician was sent to retrieve information from the EDR. The contact was not aware of the diagnosis. …
The contact owns a 2015 Subaru Outback. The contact stated that while driving 67 MPH with the cruise control activated, the vehicle suddenly decelerated to approximately 25-30 MPH while depressing the brake pedal. The contact stated that the vehicle stalled. After pulling over to the side of the roadway, the contact was able to restart the vehicle and drove to the residence. The vehicle was taken to the dealer however, the cause of the failure could not be determined. The contact's wife stated that the failure had occurred a year prior while driving approximately 55 MPH. The failure only lasted for several seconds. The vehicle had not been diagnosed or repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 80,700.
The contact owns a 2015 Subaru Outback. The contact stated that while driving at an undisclosed speed, the exhaust manifold detached from the vehicle. Due to the failure, the vehicle was towed to the residence. The dealer was contacted; however, the vehicle was not diagnosed or repaired. The dealer advised the contact that a recall repair was previously performed on the vehicle, which was related to an exhaust pipe cracking, and that additional repairs would be at the owner's expense. The manufacturer was notified of the failure. The approximate failure mileage was 244,000.
The contact owns a 2015 Subaru Outback. The contact stated that while starting the vehicle, there was an abnormal exhaust odor entering the cabin of the vehicle through the vents. No warning lights were illuminated. The contact stated that the vehicle was consuming an excessive amount of fuel. Before the contact purchased the vehicle, the contact became aware that the vehicle had been repaired under recall for the catalytic converter. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the issue. The failure mileage was approximately 135,000.
The contact owns a 2015 Subaru Outback. The contact stated that while driving at an undisclosed speed, and while at a stop light, there was an abnormal exhaust fumes odor inside the vehicle. There were no warning lights illuminated. The vehicle was taken to the local dealer, where it was diagnosed with a cracked exhaust pipe. The vehicle was not repaired. The manufacturer was contacted and confirmed that the vehicle was previously repaired under Service Program Bulletin: WUJ-95 but no additional assistance was provided. The failure mileage was approximately 110,000.
Entering a residential garage to park; experienced sudden acceleration while braking. Vehicle went through drywall/wall about 2 feet. Placed vehicle in park to stop vehicle. No airbags went off. Driving vehicle to repair shop later; experienced same rapid unexpected acceleration with different driver. No issue with floor mats. OEM mats. Service center cannot provide any insight or reproduction of event.
#1. I replaced the battery in June of 2022 after all the dash warning lights came on. My eyesight safety feature was rendered in operative. After the battery was replaced, all the warning lights eventually went out. In July of 2023 the same scenario happened again. I returned to Advance Auto retailer and the store manager checked the battery. She replaced the battery with a new one of greater cold cranking amps. she was most knowledgeable and extraordinarily gracious. I asked her to check the alternator for proper function and was told it was functioning as it should. #2. On June 07, 2023, I took the automobile in for service: oil and filter change and brake pads and rotors on all four wheels. My Subaru had 68,482 miles on this date. …
I was within the town limits so I was driving slowly. When I approached the first stop light in town I saw that it was red. There were of three or four vehicles stopped at that light. At that point I was probably only going 5mph. I took my foot off of the gas pedal and put my foot on the brake to make a slow stop. Instead, the car accelerated rather quickly. I continued to brake but the car seemed to speed up. I was able to avoid hitting the truck in front of me by going around it. No vehicles were coming towards me but there were some stopped at the other side of the light. I drove up on the sidewalk to avoid hitting anyone. At that point the front passenger side of the car hit & snapped a pole. The car did not stop immediately upon impact. It stopped acclerating and came to a stop about 10 feet past the pole. …
NHTSA issued a notice for a recall on the 2015 Subaru Outback for an exhaust pipe bellows crack which causes exhaust noise and odor which affects emission and engine performance. I had noticed our Subaru's exhaust smoke coming in through the air vents while idling and also a general loss of power for the vehicle. When I dug into the causes, I came across this recall and did the VIN look up on the NHTSA website and also the Subaru website for active recalls. The Subaru website states that the recall was completed. I then called the subaru retailer to check if there were any records for the recall work that was completed for NHTSA ID Number: 10199936. They could not find any records. I called in Subaru corporate to see if they could shed any light on the recall. …
The car had a recall on it for the catalytic converter and front pipe and bellows being cracked. It was replaced under a service bulletin put out by Subaru at 104,000 miles in 2020. I just went to get the vehicle inspected in 5/2023 and the exact same part is failing once again. It will not pass inspection. This causes exhaust to leak back into the car (including carbon monoxide) given the converter/bellows are parts that come off the engine right under the driver/passenger's front seat. I have called corporate Subaru to see what could be done and they refuse to do anything since they told me the car is a 2015 and had 167,000+ miles. At this point, it will cost me a few thousand dollars to fix at which point has to be done by Subaru and they will replace it with the exact same parts that have proven time and time again to be a poor design and fail. …
Engine complaints in other Outback years
Frequently asked questions
How common are engine problems on the 2015 Subaru Outback?
NHTSA has 50 complaints about the engine & cooling of the 2015 Subaru Outback, 10% of the model year's 510 complaints. The component named most often is exhaust system › emission control › catalytic convertor (1 mentions).
Is there a recall for 2015 Subaru Outback engine problems?
No. NHTSA lists no engine & cooling recall for the 2015 Subaru Outback, though it has 5 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2015 Subaru Outback engine problems start?
Half of the complaints with a recorded mileage happened before about 47,000 miles, and 29% before 25,000 miles.
Is it dangerous?
Owners linked 2 crashes, 2 fires and 2 injuries 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.