2021 Subaru Outback: multiple warning lights

Filed May 4, 2026 · Steering, Suspension · NY

I am filing this complaint regarding multiple serious safety defects in my 2021 Subaru Outback purchased in July 2021, currently at 48000 miles THERMO CONTROL VALVE FAILURE (26,307 miles) While traveling in the center lane on [XXX] southbound in [XXX] the evening of 1/6/2024 my vehicle suddenly experienced a complete loss of control. It seemed that the car was accelerating and braking at the same time without driver input making it impossible to operate safely. It started shaking and several lights were illuminated on the dashboard, power steering was not working. The car coasted to the right shoulder and starlink was used to call for help. The car was towed to the dealership for repairs. The diagnosis was a failed thermo control valve and related sensor circuit. There were no dashboard lights before the incident that fore shadowed this event. This failure rendered the vehicle completely inoperable at highway speed and posed and extreme risk to the safety of the driver, passenger and other motorists. I am aware that Subaru has extended the warranty on the thermo controls valve to 15 years/150000 miles for 2020-2022 Outback’s which suggests that Subaru had knowledge of the defect. Since the incident several other premature “wear” defects have presented under 48000 miles on a 2021 vehicle: - 41,402 miles: driver side rear strut replaced - 41,402 miles: rear brake pads and rotors - 41,402 miles: driver side front window motor, regulator and run Chanel - 41808 miles: rear knuckle assembly, rear wheel bearing and backing plate replaced - 45,768 miles: front brake pads and and rotors replaced - 48,000 miles: complete exhaust system - 48,000 miles: passenger side front window motor, regulator and run chanel This vehicle has proven to be uncharacteristically unreliable for a Subaru Outback. The intended use for this vehicle is for my children to drive to college nearly 600 miles from home in the fall. This car is not appropriate for this purpose. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION

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 Dec 14, 2024 · Acceleration, Driver assistance · IL

The speed control (adaptive) doesn't work. The interior heater doesn't work. Several lights including the 'check engine' light come on the dash. The lane departure system doesn't work. (It appears the thermo control value subassembly may be at fault.) The car has approximately 25K miles on it.

Filed Aug 12, 2024 · WA

2021 Subaru Outback Limited | ~13000 miles | Component: Battery | Car suddenly stopped and ALL warning lights started flashing at a busy traffic signal, while I was waiting to take a left turn (lucky to have escaped safely from that situation). I had to turn the car off and restart it. 2 days later, the car would not start at all. Tried jumping it multiple time in vain. Had to tow the car to the nearest Subaru service center. Technician ran a diagnostic and concluded that the battery was not holding any charge at all and it was deemed faulty. Reading many posts on reddit and other forums of many Subaru owners facing the same issue from older (2015) to newer models. Many of them also complained of Parasitic drain on the battery due to faulty DCM on Starlink. Note: there was no warning lights/messages or any other symptom before this. This was a Subaru certified pre-owned car that went through a 152 point inspection in 2023.

Filed Jan 7, 2022 · Driver assistance · OH

The Subaru Eyesight system malfunctioned while I was driving. All Eyesight components were enabled at the time of the incident, including pre collision braking and forward collision warning. I had been stopped at a red light at a four way intersection. I was the first car waiting at the red light, with other cars behind me and to each side. The intersection had multiple lanes in each direction. There were four lanes going the direction I was driving, and I was in the second from the right. When the traffic light turned green, I took my foot off the brake and onto the gas to begin accelerating. I accelerated through the large intersection reaching approximately 20 miles per hour. The speed limit is 25 or 30 there so I was continuing to accelerate to that speed and was just about through the intersection when the pre collision braking suddenly engaged with no warning at all. My foot was still on the gas trying to accelerate when this happened. All of the lights that show on the windshield seemed to light up red, and it showed that the pre collision braking had engaged on the dashboard screen behind the steering wheel. The car came to an immediate stop in the middle of the road and would not move forward. I took my foot off the gas and my car would still not move. My dashboard said something along the lines of “firmly press brake to hold stop.” I hit the brake, then everything returned to normal and I could move forward. I moved forward, safely switched to the right lane and pulled into the nearest driveway to get off the road and park. I then disabled all Eyesight features and called my Subaru dealership who said they will “diagnose and recalibrate” the system on 1/14/2022. My car and windshield were clean and my windshield is the same from the factory with no defects. No cars were in front of my- the road ahead was wide open, clear, flat, and straight. No one turned in front of me or anything. Fortunately I was not rear ended but it was very scary and dangerous.