2021 Subaru Outback: sudden loss of power

Filed Mar 26, 2026 · Acceleration, Engine · CO

The failure involves the engine (powertrain), which was under warranty. The vehicle has experienced four catastrophic engine failures resulting in sudden loss of power, including at highway speeds (65–75 mph). The most recent failure also involved an oil-saturated catalytic converter. These failures occurred between 06/25/2024 and 03/16/2026. During this ~629-day period, the vehicle was only in my possession for about 184 days, as it remained at the dealership for diagnosis, repairs, and repeated engine replacements. The issue remains unresolved. The vehicle is currently in my possession, available for inspection, and is not being driven due to safety concerns. All failures occurred during normal driving and caused sudden loss of power with no prior warning, leaving the vehicle inoperable and stranded. This created a significant safety risk due to inability to maintain speed or safely merge, increasing the likelihood of rear-end collisions. The failures have been confirmed by an authorized Subaru dealership, with multiple engine replacements performed under warranty and most recently as a goodwill repair. Both the dealership and Subaru of America have acknowledged they cannot determine the root cause. The dealership’s Operations Director stated the vehicle is not safe and he would not allow his family to drive it. The vehicle has been inspected multiple times by the dealership and Subaru of America. However, no inspection reports, diagnostic data, or detailed findings have been provided despite repeated requests. Additional issues (including a broken axle and oil-saturated catalytic converter) were only identified during a third inspection after being missed previously. Requests for explanation were not answered, and further details were withheld as “internal.” There were no warning indicators prior to the first three failures. During the fourth, a temperature warning appeared only seconds before failure.

Filed Dec 3, 2025 · Acceleration, Driver assistance · CA · crash

On 10/29/25 the car lost power once it got to 3500rpm. Multiple warning lights came on. On 11/06/2025, the Thermo Control Valve, high pressure fuel line, and gaskets for intake manifold and EGR were replaced. On 11/24/25, when backing up slowly in a small parking lot, the rear camera detection picked up a raised cement walkway with metal railing. The brake was applied by the driver, however the car accelerated quickly and slammed into the railing and cement. The vehicle was placed into drive after the collision and continued normally. The brake was on once the warning light beeped and prior to the collision. The foot was not removed from the brake pedal until it was in drive. It could not have been placed into drive without the brake pedal being pressed. I asked the dealership if they could pull data from the car at the time of the incident, and was told they weren't sure they would get any information. It has not been inspected by a dealership or insurance. There was no damage done to the cement and railing was already bent. Only the car sustained damage.

Filed Aug 30, 2024 · Acceleration, Electrical · CA

ON thursday night at about [XXX] i was driving in the carpool lane going north.in the [XXX] , with full tank of gas ; suddenly i felt and here a noise, and the vehicle (2021outback base) start losing power, at the point that totally stop. call 911, and few minutes after the hway patrol came and push us out of the freeway, there was not any shoulder to be safe out. when the police officer try to turn it on the vehicle star but no power was available even when the vehicle was on.. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Dec 12, 2023 · MA

While my husband was driving up a hill at low speed (25-30miles/hr) the car lost power, struggled and felt like it was going to stall. 5 days later, I was driving up a hill going 25miles/hr, the car lost acceleration the stalled, was unreponsive to gas pedal being depressed, the car then started again on its own. I brought the car to Subaru but they couldn't find anything wrong. Luckily nobody was behind me when the car stalled.

Filed Mar 27, 2023 · Steering · 17,500 miles · FL

The contact's wife owns a 2021 Subaru Outback. The contact stated that while driving at various speeds, the vehicle experienced loss of power steering as the power steering warning light and several unknown warning lights were illuminated. The contact stated that the failure occurred on several occasions. The vehicle was taken to a local dealer, where it was diagnosed that the power steering rack needed to be replaced. The vehicle was repaired; however, that the failure recurred. The vehicle was then taken back to the dealer, where it was diagnosed that the power steering wiring harness needed to be replaced. The vehicle remained at the dealer awaiting repairs. The manufacturer was made aware of the failure. The approximate failure mileage was 17,500. The VIN was not available.

Filed Feb 13, 2023 · Electrical, Engine · CA

Traveling toll road /fwy at approx 70mph at rush hour and lost all power with Check engine light , emergency brake, lurching engine, all flashing at the same time!!! Coasted through 4 fwy lanes to offramp and service station- extreme danger!!! How was there no pile up with me going from 70-10 to coasting on a busy 15 Northbound fwy at 7:30 am?????? Was in toll lane and crossed toll 3 foot sticks to exit at first available exit. 2 cars followed me off as they were concerned for my safety Towed to shop where they put in new thermo valve, gasket intake manifold, Pipe ay- fuel and gasket egr pipe 56000miles, 2 year old car 3 replaced windshields in last 6 months They said they've done 10 cars with this problem in the last year???? Insurance covered windshields , service center at Subaru inspected car

Filed Feb 3, 2023 · Driver assistance · 14,000 miles · CT

The contact owns a 2021 Subaru Outback. The contact stated that while driving approximately 68 MPH with the cruise control activated, the vehicle suddenly lost motive power. No warning lights were illuminated. The contact stated that it was difficult while attempting to shift the gear lever out of drive(D). The contact stated that once she was able to shift the gear shifter, she shifted into park(P) to turn off the vehicle. The vehicle was restarted after multiple attempts. The contact then noticed that the parking brake had engaged independently. The vehicle was taken to a local dealer, where the failure could not be duplicated. The vehicle was not repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 14,000. The contact stated while driving on Mass Pike the Adaptive Cruise control was engaged, in the middle lane and no problems the vehicle lost power. After five minutes and traffic moving, the vehicle was trying to reboot but the emergency brake was on without anyone applying it. And the contact had a difficult time putting the vehicle into to park to restart the engine.