Which parts fail
Components named in complaints (battery, alternator, wiring, ignition, instrument cluster, infotainment).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2021 Subaru Outback owners, lightly cleaned up (personal details are redacted by NHTSA).
The engine block of our car caught fire while it was parked and turned off. It melted the engine and hood of the car, totaling it. Thankfully, we were not in the vehicle when the incident occurred, so no one was injured. At the time of the incident, our car was parked outside our apartment building under a low-hanging tree, which was burned in the fire. Had a neighbor not noticed and called 911, the fire may have spread to the nearby apartment building and caused much more severe damage than what was already done to the car. We had no warning prior to the incident. To our knowledge, the car was in perfect condition. We had bought it brand new 16 months prior and had taken it in for its scheduled maintenance 3 times. We are unaware if the vehicle has been inspected yet or if they've discovered the origin of the problem. …
The contact owns a 2021 Subaru Outback. The contact stated while starting the vehicle, the starter motor was making an abnormal clicking sound. The contact stated that after several attempts the vehicle was started. Additionally, the contact stated that at times the instrument cluster was blank. The contact stated that he purchased a battery charger and recharged the battery; however, the failure persisted. The contact stated that once he had fully charged the battery the vehicle was started; however, sometimes the vehicle failed to shut off and the battery terminals had to be disconnected. The contact drove the vehicle to a local dealer who diagnosed that the OE battery was not sufficiently powerful to start the vehicle and provide power all the electrical functions. The dealer installed a new battery with more amperage and new cables. The vehicle was repaired. …
The contact owns a 2021 Subaru Outback. The contact's wife was driving 40 MPH and noticed that the center console display screen went blank and rebooted independently after a few minutes. However, the failure reoccurred and affected several safety features on the vehicle including the HVAC controls, Bluetooth connectivity, and navigation on the vehicle. The contact took the vehicle to a local dealer who inspected the vehicle and duplicated of the failure the but could not determine the cause of the failure. The dealer was able to install a software monitor to replicate the failure so the contact could notify the failure to the dealer. The contact took the vehicle back to the local dealer where the dealer replaced the center module in an attempt to repair the vehicle however, the failure still occurred. The vehicle was not repaired. The manufacturer was made aware of the failure. …
On Sunday, August 20, 2023 I was pulling into a parking spot in front of an Anytime Fitness at a local strip mall. As I applied the brake, the motor raced and accelerated driving me into a pillar outside of the fitness center. I was in shock, not understanding what had happened. Had I chosen to park one stall to the right, the car would have gone through the window of the business instead of the pillar. Considerable damage was done to the pillar and to my 2021 Subaru Outback, but I was not injured, and no one else was injured. I had the brakes checked at my vehicle service center and was told the brakes were functioning as they should be. The vehicle has not been inspected by the manufacturer, police, insurance representatives or others. No warning was provided by the vehicle. The crash occurred in two seconds.
The contact owns a 2021 Subaru Outback. The contact stated that while driving at various speeds, the home screen on the center console would go blank without warning. Once while driving 65 MPH with the cruise control activated, the center console went blank and the cruise control deactivated with several unknown warning lights illuminated. The contact stated that vehicle abruptly slowed down due to the failure and the 360-camera feature failed to operate as needed. The dealer was notified and acknowledged the failure; however, they informed the contact that there was no remedy for the defect. An independent mechanic was also notified and provided the contact similar information as the dealer. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 11,000.
While slowly backing out of a parking space, the vehicle suddenly accelerated on it's own - I do not recall pressing on the accelerator but the engine surged and the vehicle rapidly reversed and struck 4 other parked cars. It felt as if the accelerator became stuck and would not respond to braking. No warning light or dashboard alerts appeared. Subaru eyesight and adaptive cruise control were not engaged at the time. There was no known obstruction under the petals. This felt like a serious malfunction and could have caused serious injury. I am reporting this in case it is part of a wider issue affecting this model and because i see that there are multiple complaints to you about sudden unintended acceleration, especially during low speed maneuvers like backing out a parking space.
The contact owns a 2021 Subaru Outback. The contact stated while attempting to start the vehicle, the vehicle failed to start. There was no warning light illuminated. The contact was able to jumpstart the vehicle. The vehicle was taken to an independent mechanic where the vehicle was diagnosed with battery failure. The contact was informed that the battery needed to be replaced. The battery was replaced; however, the failure persisted. The dealer was contacted, but the vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 57,000.
The contact owns a 2021 Subaru Outback. The contact was unable to start the vehicle. The contact stated no warning light was illuminated. The contact jump started the vehicle; however, approximately 5-7 days later, the failure recurred. The vehicle was not diagnosed or repaired. A dealer was not contacted. The manufacturer had been informed of the failure. The failure mileage was approximately 48,000.
The contact owns a 2021 Subaru Outback. The contact stated that the battery had fully drained and was recharged two times. There was no warning light illuminated. The third time the vehicle was towed to an unknown mechanic and was diagnosed with needing the battery to be replaced. The vehicle was repaired. Subaru was informed of the failure. The failure mileage was approximately 832.
Your form would not allow me to chcek all applicable issues. I believe the computer system and brakes are the major issues. The start/stop system engaged when I was turning in the middle of an intersection. When driving at cruising speeds (foot on the gas pedal), the car suddenly felt as if the brake was being engaged. The forward and rear collision warning signals do not work. The blind spot warning does not work. There is grinding coming from the undercarriage at times (random), while my foot is on the gas. The car bucks for no reason. The battery is draining (less than 2,000 miles on the car). Sometimes I have to turn the ignition twice in the morning. I turn everything off when I get out of the car. My safety and safety of others is definitely at risk. …
Electrical complaints in other Outback years
Frequently asked questions
How common are electrical problems on the 2021 Subaru Outback?
NHTSA has 76 complaints about the electrical system of the 2021 Subaru Outback, 26% of the model year's 298 complaints. The component named most often is 12v/24v/48v battery (2 mentions).
Is there a recall for 2021 Subaru Outback electrical problems?
No. NHTSA lists no electrical system recall for the 2021 Subaru Outback, though it has 4 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 2021 Subaru Outback electrical problems start?
Half of the complaints with a recorded mileage happened before about 3,000 miles, and 75% before 25,000 miles.
Is it dangerous?
Owners linked 2 crashes, 1 fire and 1 injury to electrical system 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.