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 2020 Subaru Outback owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2020 Subaru Outback. The contact stated while driving 65 mph when multiple warning lights were illuminated and a "Stop Driving the Vehicle" message was displayed. The contact stated he was able to drive to a nearby gas station. The contact stated while inspecting under the hood, he noticed the drive belt was shredded. The vehicle was towed to a local dealer, where it was diagnosed with needing the drive belt to be replaced. The vehicle was repaired. The contact stated in February of 2021, the tailgate failed to open with the key fob or manually. The contact stated after opening the tailgate, it failed to latch and close properly. The contact stated the tailgate ajar warning light was illuminated. The local dealer was called and made aware of the failure. The dealer informed the contact to disconnected the battery. …
3 weeks ago the all of the warning lights came on. Had vehicle towed to dealership. Could not find out what was wrong. Saw there was a lot of carbon build up which was unusual since there is only 26,000 miles on vehicle. After a week a dealership a cleaning took it home. Went back the next day. They inspected and stated it was the spark plugs and needed new fuel injectors. Had replaced. Everything still covered. Picked vehicle up finally after 17 days of it being there. When picking it up the paper work stated the vehicle had cylinder 1 misfires 30-45 times in a 3 hour period. But was assured the vehicle was repaired and fully inspected and 100% safe. Within 24hrs of driving the vehicle. The next morning we drove to school and with after the second light we smelled smoothing rolled windows down and but was sure if it was us. …
The contact owns a 2020 Subaru Outback. The contact stated while driving 30 MPH, the vehicle began to jerk and then stalled. The check engine warning light and several unknown warning lights were illuminated. The contact was unable to veer to the side of the road. The contact was able to restart the vehicle and continued driving; however, the failure reoccurred that same day. The contact veered to the side of the road and restarted the vehicle. The contact was able to drive to her residence; however, the failure persisted. The vehicle was towed to the dealer where it was diagnosed that the Engine Control Module (ECM) was malfunctioning. The dealer reset the warning lights; however, the failure had recurred more increasingly. …
On 12/6/2023, as I slowly turned right into a parking space, my car suddenly surged forward and accelerated without my input to the gas pedal. The brakes did not work, and there was no resistance from the brake pedal when I repeated to push it. The car continued to accelerate for about 80 ft as I focused on steering to avoid hitting other cars parked in the lot. The car ran over a curb, up a grassy area, and crashed into a row of trees. The airbag did not deploy. I sustained neck muscle strain/whiplash, and bruises to my chest and right knee. My safety was at risk, as well as anyone or anything that was in the car's path since I had no control over the acceleration or the brakes. The car is a 2020 Subaru Outback with about 44000 miles. It is in a body shop and they have not yet determined if it is safe to work on. So far, they have observed the engine race when the car was turned on. …
What component or system failed or malfunctioned, and is it available for inspection upon request? - Car fire, originating under the hood. Unknown if vehicle is available for inspection. Last reported by Insurance company to be at IAA; [redacted]; PH#: [redacted]. How was your safety or the safety of others put at risk? - Car fire began while in the car after moving through an intersection with a stop light. Four of us in the car, ages raging from [redacted] old. Fire quickly spread; however, we were able to exit the car without injury. Has the problem been reproduced or confirmed by a dealer or independent service center? - NO, car was totaled and Subaru, NA Consumer Advocacy agent assigned claims that the vehicle is no longer available for inspection. Both insurance company (Travelers Auto) and Subaru, N.A. …
I pulled into my driveway, came to a stop and planned to back up a short distance to be nearer the front walkway. Before I could shift into reverse the car started to accelerate forward. I slammed my foot onto the brakes which had no effect on the acceleration. The car stopped when the lower bumper hit and ran up onto a large boulder on the edge of the driveway. The car was partially wedged on the top of the boulder but I was able to back it off the boulder, park and turn off the car. I have scheduled an appointment with the service department on February 1st, at the dealership where I purchased the vehicle in June 2020. Of note, I had a routine oil change and service check at this dealership on January 16 with no engine problems noted.
The contact owns a 2020 Subaru Outback. The contact stated that on various occasions upon bringing the vehicle to a stop or upon acceleration the vehicle had experienced a total loss of automotive power, and all of the warning lights would remain illuminated. The vehicle was taken to a local dealer where it diagnosed and the contact was advised that the battery, and thermal valve were faulty and needed to be replaced. The battery had been replaced five times however the contact noted that the failure persisted. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 19,000.
The contact owns a 2020 Subaru Outback. The contact stated that while enter a freeway the speed suddenly reduced to approximately 15 MPH. The vehicle failed to exceed 15 MPH. Additionally, the vehicle lurched forward and would not immediately stop while depressing the brake pedal. During the failure several warning lights had illuminated including the check engine, brakes, and stability control. The vehicle was towed to the local dealer who reprogrammed the computer however, the failure continued. The manufacturer was notified of the failure. The failure mileage was 23,000.
The contact owns a 2020 Subaru Outback. The contact stated that while driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was taken to an independent mechanic, who diagnosed a failure with the thermo-control valve. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 90,000.
A fire started under the hood of my car while I was driving. There were no warning lights on in my car and the temperature gauge was in the middle where it usually is. Earlier in the day, I smelled gas, but I thought it was a different car as the smell of gas went away after a car that had a lot of exhaust coming out was no longer in sight.
Engine complaints in other Outback years
Frequently asked questions
How common are engine problems on the 2020 Subaru Outback?
NHTSA has 51 complaints about the engine & cooling of the 2020 Subaru Outback, 6% of the model year's 901 complaints. The component named most often is engine › engine control module (ecu/ecm) (1 mentions).
Is there a recall for 2020 Subaru Outback engine problems?
No. NHTSA lists no engine & cooling recall for the 2020 Subaru Outback, though it has 6 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 2020 Subaru Outback engine problems start?
Half of the complaints with a recorded mileage happened before about 8,000 miles, and 94% before 25,000 miles.
Is it dangerous?
Owners linked 3 crashes, 3 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.