Which parts fail
Components named in complaints (automatic emergency braking, adaptive cruise, lane keeping, backup camera).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2020 Subaru Forester owners, lightly cleaned up (personal details are redacted by NHTSA).
Driver gets choked while drinking a cold beverage, gets disoriented and loses consciousness momentarily causing the vehicle to veer off the street and strike a tree with extensive front end damage. Airbags did not deploy at all. Driver has injuries from the crash, such as possible fractured wrist, contusions and much pain in the neck, chest and back areas. She was transported by EMS to the hospital. Insurance was notified and an adjuster has already sent a repair appraisal and cut a check for the estimated cost of repairs. The driver does not feel comfortable about the having the car repaired with potentially faulty airbags. We have photos of the car. We have stated our concerns about this to the insurance company and the vehicle manufacturer. They have opened a file with our concerns and we are waiting to learn further from the insurance provider and the car maker. …
The contact owns a 2020 Subaru Forester. The contact stated while driving 75 MPH, the Forward Collision Avoidance Automatic Emergency Braking system activated and applied the brakes. The contact was able to pull to the shoulder of the roadway, where he smelled a burnt smell in the interior of the vehicle. The vehicle returned to normal functionality, but the failure became a regular occurrence. The check engine and brake warning lights were illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the throttle body. The vehicle was repaired, but the failure reoccurred. The manufacturer was notified of the failure, and a case was opened. The failure mileage was 35,600.
The contact owns a 2020 Subaru Forester. The contact stated that while driving at approximately 30 MPH, the brake pedal of the vehicle was applied inadvertently without any vehicles surrounding the vehicle. The contact stated that simultaneously a " Pre collision braking system was activated " message appeared. The vehicle was taken to the residence. The vehicle was towed to a dealer where the failure was not replicated. The manufacturer was notified of the failure. The failure mileage was approximately 26,000.
I was on cruise control, and it randomly decided to go 81 MPH instead of 50 mph i set it to, it did not respond when I tried to turn off the cruise control, and I ended up crashing into a semi, I survived but my [redacted] daughter died.
Automatic braking system failed and led to a front end collision immediately a fire broke out under the hood and accelerated into the car with in minutes using a tire iron the passenger door was forced opened Air bags deployed (3) and seat belt held
Eyesight pre-collision braking feature and pre-collision throttle management feature malfunctioned and caused the 2020 Forester to accelerate unexpectedly and lurch forward while I was manually braking and slowing to come to a complete stop behind two other vehicles stopped at a steady red light. See class action lawsuit Weston, et al. v. Subaru of America, Inc., et al. In US District Court Case No. [redacted] which alleges that the vehicle contains certain defects that caused sudden and unintended acceleration without driver input; acceleration while manually braking; and that these defects created a safety risk, because they severely affected the driver's ability to control the car's speed, acceleration, and deceleration, and increase the risk of a collision, which did in fact occur. …
**Component or System:** Subaru EyeSight Driver Assist System (specifically the Pre-Collision Throttle Management system). **Incident Description & Warning Messages:** There were no warning lamps, messages, or symptoms of any problem prior to this failure. The incident occurred while I was stopped at a red light at a busy intersection. When the light turned green, I removed my foot from the brake and pressed the gas pedal to proceed, but the vehicle would not accelerate. The system had engaged a false-positive throttle cut. At that exact moment, the car began beeping repeatedly and the EyeSight logo flashed on the dashboard, incorrectly indicating an obstacle or imminent collision, even though the path in front of my vehicle was completely clear. …
In April 2022 after owning the car for 4 weeks the Eyesight went out. I was told it was due to the thermal control module. That was replaced. I'm n June 2023 the AC went out. They said it was the blower motor. That was replaced. In September 2023 the AC went out again. At that point they found the cause was actually a fully melted fuse box and fuses. They replaced the fusebox and the entire AC system. I have had 3 batteries in the vehicle since March 2022. In December 2024 they found that my car needed an update and the update friend the transmission controls module. Then the starter went out at the same time. After that was fixed a week later all the lights in my dash came on and there were no safety features running in the vehicle. I reach out to Subaru and I was told this was all normal wear and tear in the vehicle and it just happens. …
1-16-24:car wouldn't open and start; jump-started by AAA to dealer; dealer kept overnight & checked battery: said charge held, ready to go home. 1-30-24, 4 pm-ish: able to start n drive, but check engine& eyesight warning light came on- late in day, so didn't drive to dealer. 1-31-24: car dead; jump-started by AAA again & drove to dealer. On 2-1-24, dealer sends a video & says replaced battery, but check engine light & eye sight warning light still on; investigated further & found there was a lot of water that had pooled under the passenger seat & caused some corrosion- I.e.: shorted out electrical system. I asked dealer to report to Subaru since this seemed like a car defect. 2-9-24- dealer says Subaru won't repair it at their expense and it's a 25 hour job & will cost a lot. …
The thermo control valve malfunctioned causing the check engine light to come on which shut down all the safety features in the vehicle including the front eye sight camera, blind spot warning, the rear automatic braking, lane departure warning, adaptive cruise control, and lane keeping assistance. The check engine computer readout diagnostic trouble code was P26A5 "Engine Coolant Bypass Valve "A" Position Sensor Circuit Range/Performance". The vehicle was taken to a Subaru dealer who found the thermo valve performance was out of spec. This vehicle has not been recalled although the manufacturer replaced the part in 2021 vehicles acknowledging the valve was faulty. Because of the mileage on my vehicle, it was not covered under the warranty although many have been replaced under the manufacturer's warranty due to the failure of this valve under the 60,000 mile warranty. …
Collision Avoidance complaints in other Forester years
Frequently asked questions
How common are collision avoidance problems on the 2020 Subaru Forester?
NHTSA has 56 complaints about the driver assistance of the 2020 Subaru Forester, 9% of the model year's 603 complaints. The component named most often is automatic emergency braking (27 mentions).
Is there a recall for 2020 Subaru Forester collision avoidance problems?
No. NHTSA lists no driver assistance recall for the 2020 Subaru Forester. 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 2020 Subaru Forester collision avoidance problems start?
Half of the complaints with a recorded mileage happened before about 5,000 miles, and 82% before 25,000 miles.
Is it dangerous?
Owners linked 5 crashes, 1 fire and 7 injuries to driver assistance 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.