Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2020 Subaru Ascent owners, lightly cleaned up (personal details are redacted by NHTSA).
Reporting a serious incident with my 2020 Subaru Ascent at 21k miles. On October 16th, a burning plastic smell and white smoke from the floorboard forced an immediate stop; I had to call the fire department for safety. The vehicle's battery has been replaced thrice, and the radio system frequently resets. Despite a Subaru recall fix in February meant to prevent such issues, the problem persists, raising major safety concerns. With 20+ years in electrical engineering, I've noted consistent electrical issues with this car. I urgently request NHTSA intervention for an immediate and thorough investigation, holding Subaru accountable for ensuring vehicle safety.
The contact owns a 2020 Subaru Ascent. The contact stated that while driving at an undisclosed speed, the Forward Collision Avoidance front camera became inoperable. The pre-collision, the braking control, and the Lane Departure warning lights were illuminated. The vehicle was taken to the dealer to be diagnosed; however, the cause of the failure was not yet determined. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 19,737.
Several times my 2020 Subaru Ascent has failed to start and required a jump. I have taken my vehicle into the Subaru dealers 3 times for this problem. Every time they tell me something was left on that drained the battery when the vehicle was turned off. One time they replaced the battery but same issue occurred after the battery was replaced. Another time they replaced the radio but same problem occurred after replacing with a new radio. The last time they told me the WiFi was turned on. We don't even have a Wifi account for this vehicle which is needed to use the WiFi. Each time the dealers reset electrical components and computer chips they said needed to be reset. This vehicle is a daily driver so does not sit long between starts. I brought the vehicle in October of 2020 when it had 5K miles on it and to date only has 16K now. …
My Subaru 2020 with 16,000 miles stalled in the middle of driving down the road in Town, I was driving 35 mph when out of nowhere the car stalled. I was able to coast/turn on to a side street. I'm lucky the car had enough momentum to keep going or we would have been hit by traffic as the street we were on is a busy road. The car flashed all the lights when it stalled and refused to crank over, it was low on gas so I called AAA and they brought 5 gallons of gasoline and filled it. The technician then tried to get the vehicle to start but it wouldn't. Luckily he offered to tow it to my house for free. I have tried multiple times to get the vehicle to start and it wont. It cranks but doesn't actually move. I don't know what's wrong and now I have to have it towed to the the local dealership. This is the second major issue that has happened. …
Component- steering locks Safety risk - vehicle cannot be started. Therefore if in an area of risk - cannot start vehicle. This randomly happens pulling into parking spaces. It is repetitive. I'm older and alone, scary when it happens as you are stranded. And call to Subaru roadside only option was to tow the vehicle the vehicle to dealership. Online fix is to man handle the steering wheel and turn it in the direction of the tension. Pulling into a normal parking space should not create the tension necessary for the steering wheel to lock. I have been on Subaru ascent form us and this seems to be a common problem with this vehicle. Mine has been inspected for the last occurrence and was told battery issue. The other times there were no battery issues and dealerships cannot find issues. Warning light only lights up after steering wheel locks up and vehicle cannot be started. …
During a camping trip the battery died when the tailgate was left open. Second battery incident: Went to go start my car after not driving for 6 days, battery was dead. No lights, doors, or hatch was on or open. After using a trickle charger I recharged the battery and was able to start the car after 4 hours of charging. After the car sat for one day the engine did turn over, but it sounded like it took a bit of extra effort for the starter to get the engine going. Third battery incident: I went to start my car again after it was parked for 5 days and the battery was dead again. I used the trickle charger again and was able to charge the battery to over 80%. The next day I took the car in for a service to investigate why the battery was draining to dead after not driving for days. The service department was unable to determine a cause of the issue. …
While parked, for no reason, the battery discharged to the point the car would not start and I could not open the tail gate. The car had been driven for 2 hours the day before. The car was parked at a campground with the tail gate open for a few hours but the other doors were not open. In the evening I closed the tail gate. The next morning about 10:00 am I tried to drive off and the battery was dead and other electronic devises would not work (door locks, electric tailgate etc.) This could have been very serious as I had a hard time locating help to jump start the car. If I had needed to drive for an emergency as if my wife had a medical issue the car's malfunction would have been very serious! This problem has been reported on the internet for Subaru Ascents and I feel it is a safety defect and Subaru should be required to fix it. I do not trust this car. …
Battery randomly failed on 1/5/22. Had it jumped, kept it on for an hour. When I went to start the car on 1/6/22 the battery is dead again. 7,000 miles on the car, no signs of any issue prior to the failure. My safety was at risk because it was freezing outside. I attempted to contact subaru's roadside assistance per their 3 year 36K mile warranty but when calling the automated message said there are significant delays in call times and to submit the issue online. I tried submitting online but the online submittal process was not working. I ended up having it jumped through my insurer, though now I have to figure out how to get a new battery. I saw where Subaru 2020 ascent OEM batteries are part of a class action, so probably going to avoid taking it to the dealer for a replacement.
The care continues to drain power resulting in dead battery. We have had continuous issues since purchasing the vehicle. The Dealer even installed a higher quality battery and due to Subaru admitting tot the problem. However this has not resolved the issue. The vehicle has been inspected multiple times at a factory dealer. We can't be in and out of the care while parked for 45 minutes. Subaru markets the vehicles for camping and recreation vehicles, but the vehicle is useless in these scenarios. Furthermore, there is great potential now in the winter session that we could become stranded in the vehicle. Also note that with a dead battery the rear hatch is in operable. The manual release is not easy to get to.
I purchased this car new, and it has less or about 20.000mile. I am using it daily. Yesterday suddenly the sound system stop playing. Neither the radio, the CD player, or the car play. Just the sound. Today, the battery died, but all the buttons will flickering and would not stop. My husband had to remove the battery cables so to stop. I also have notice in the past that the frond windows will close in a slower pace than normal. I saw here that there is a class action about this issue. Very disappointed, if this issue will not resolved I am driving my kids daily and I cannot have this happening in the middle of a road or while it is feeezing outside.
Related recalls
Electrical system › Wiring › Interior/under dash
Subaru of America, Inc. (Subaru) is recalling certain 2019-2022 Ascent vehicles. The ground bolt that secures the ground terminal of the Positive Temperature Coefficient (PTC) heater may have been improperly fastened, which could result in melting of the ground terminal and surrounding components.
Remedy: Owners are advised to park their vehicle away from structures and to avoid leaving the vehicle unattended while the engine is running.
Electrical complaints in other Ascent years
Frequently asked questions
How common are electrical problems on the 2020 Subaru Ascent?
NHTSA has 101 complaints about the electrical system of the 2020 Subaru Ascent, 31% of the model year's 324 complaints.
Is there a recall for 2020 Subaru Ascent electrical problems?
Yes — NHTSA recall 22V-907 (interior/under dash, Dec 8, 2022). Recall repairs are free at authorized dealers.
At what mileage do 2020 Subaru Ascent electrical problems start?
Half of the complaints with a recorded mileage happened before about 6,000 miles, and 100% before 25,000 miles.
Is it dangerous?
Owners linked 0 crashes, 1 fire and 0 injuries 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.