2019 Subaru Forester driver assistance problems

Filed Aug 21, 2026 · Acceleration, Brakes · 80,000 miles · NY · crash

The contact owns a 2019 Subaru Forester. The contact stated that while driving at 30 MPH with the adaptive cruise control engaged, the vehicle accelerated independently. The contact depressed the brake pedal; however, the engine revved loudly, the vehicle continued to accelerate and collided with the rear of a minivan. The contact was able to steer the vehicle to the side of the bridge and stopped the vehicle. The side air bags deployed after the crash. No injuries were reported. A police report was not filed. The vehicle was towed to a tow yard by the Port Authority Police. The dealer was not contacted. The vehicle was not diagnosed or repaired. The contact retained legal counsel. The manufacturer was not notified of the failure. The failure mileage was approximately 80,000.

Filed Jan 8, 2026 · Driver assistance, Engine · VA

Engine lost power and was misfiring while many warning symbols appeared on the dash. There was a divider separating the lanes. The car coasted to almost to a stop, but the engine chugged enough to slowly turn left at the first opening in the divider and just barely made it off the main road. The engine stopped. I restarted it several times. The engine was misfiring barely running. The electric brake was applied on its own. The car did not respond to moving the shift selector out of park, so the car was immobilized. I put the 4-way flashers on and called AAA. There seemed to be no way for me to move it out of park or release the electronic parking brake. AAA could not respond quickly and suggested I call the police to divert traffic around my car for safety which I did. The tow truck operator was able to disengage the wheels and was able to flatbed it to the nearest repair shop. This being Saturday 1/3/26 it wasn't until Tuesday the repair shop determined the car would not run long enough to provide a reliable diagnosis due to the multiple trouble codes coming up on the computer analysis. I had the car towed to the nearest Subaru dealership who replaced the thermos control valve under their warranty extension. The dealership said usually when this part fails it just triggers a check engine light and not the dangerous situation I experienced. I believe a recall to replace this part should be issued on all cars with this defective part as its failure can cause a dangerous situation without warning.

Filed Nov 21, 2025 · Driver assistance · FL

The contact owns a 2019 Subaru Forester. The contact stated that while driving approximately 70 MPH, the Forward Collision Avoidance system activated, and the vehicle immediately decelerated to 56 MPH. The failure was intermittent but had occurred several times over 5 years. The contact had to manually turn off the Forward Collision Avoidance system to avoid the failure. The vehicle was taken to the dealer, who was unable to determine the cause of the failure. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was unknown.

Filed Oct 20, 2025 · Driver assistance · VA

While I was driving on a major road, the car appeared to sense an issue and automatically started to brake. While I was a road with 55mph drivers, my car was forcing me to stop. May warning light appeared; Eyesight Issue, Check Engine, Brake and many others. I was able to disengage the crash prevention manually and continue to drive. When I took it to my mechanic, he told me all the codes went to a Technical Service Bulletin for the Thermo Control Valve. He reset the codes and told me to take it to Subaru for an under warranty repair. Once I left the mechanic, I was travelling home and the car had the same issues, again while driving on a very busy road. This time I could not disengage the system, and I struggled to get the car over to the left shoulder. It was very narrow, and not safe. I ended up having to have the car towed to the dealer. The dealer did fix the car, under warranty. However, twice I was caught on busy roads in a very dangerous situation. I am very glad that I was not injured, nor those that came to rescue me. But this should not have happened. The Technical Service Bulletin was issued on April of 2024 and I had no idea.

Filed May 25, 2025 · Driver assistance, Electrical · PA

During severe stop/go, thick, holiday traffic on I-495 (DC Beltway), during daylight hours, once AGAIN (this has happened several times before), the auto engine shutoff feature catastrophically malfunctioned, turning the car off, and simultaneously, activated the entirety of the dashboard to flash on/off, causing nearly every indicator light to come on, and then had difficulty restarting. This has been brought to Subaru's attention multiple times and they essentially have washed their hands of it and stating since they can't duplicate it, it essentially must not be occurring and they cannot repair it.

Filed Apr 4, 2025 · Driver assistance, Engine · CA

Auto start/stop shut off engine at drive thru line. Locked up brakes and could not get it to unlock and restart car. It has happened on a number of occasions. After multiple attempts trying and letting it sit for a couple of hours, somehow got it to unlock and start. Thank goodness we haven’t gotten into an accident

Filed Mar 31, 2025 · Driver assistance, Seats · IL

1) The seat is cracking on the drivers seat. The vehicle only has 64,000 miles on it. No word from Subaru. 2) Parking collision warning system works part of the time. Dangerous when the system does not detect a person or vehicle in the blind spot.

Filed Mar 7, 2025 · Airbags, Driver assistance · OK

I got in my vehicle after getting gas. I was on my way to Neosho, MO, hundreds of miles from home. Thes lights were all on and I couldn't get them to go off. I figured it was because my windshield was dirty. I turned my wipers on to find out one needed replaced. I paid $30 for 1 since I have an odd type of wipers and I had been to 3 auto stores to find it. The Eye Sight, brake, check engine, air bag, and lane assist lights never went off. Now they come on randomly and go off randomly. This causes all safety features to not work. No adaptive cruise control, nothing. I finally got them to go off somehow the day I came back home. I live nowhere near a Subaru dealer. It had no other effect on my vehicle as far as I could tell. Now when they come on. I pull over until they come back on or have to drive it home to sit.

Filed Aug 7, 2024 · Driver assistance · MI

Improper glass installed by safelight adas unable to be calibrated

Filed Apr 14, 2024 · Driver assistance, Engine · TX

The check engine light went on and the diagnostic code read was P26A3, Engine Coolant Bypass Valve is failing in my 2019 Forester, which only has 46,000 miles on it. Subaru was aware that this part was defective in the 2019-2021 models, because in Feb of 2022 the part was replaced and a service bulletin 09-80-21 was issued with instruction for replacing the part, but did not issue a recall, despite this problem causing the advanced safety features to stop working and directly affecting the proper functioning of the engine. My car is just out of warranty, and the quote to have my mechanic replace the part is almost $1200 which I am unable to afford and do not feel I should have to pay for. Subaru should be help to account for this issue.