Subaru Ascent lane assist problems

Filed Oct 31, 2026 · Driver assistance · ID · crash · 1 injury

2021 Subaru Ascent was involved in a serious collision with highway maintenance equipment near [XXX]. The vehicle's EyeSight Driver Assist Technology, specifically Adaptive Cruise Control and Pre-Collision Braking, is suspected of failing to respond appropriately to slower-moving equipment directly ahead. At the time of the collision, Adaptive Cruise Control was actively engaged and controlling vehicle speed. Lane Centering, Lane Departure Warning, and Lane Keep Assist were also enabled. The vehicle was traveling within its designated lane when it approached a highway maintenance truck equipped with a rear-mounted crash attenuator. The maintenance truck appeared to be moving slowly in the same lane. Despite Adaptive Cruise Control controlling vehicle speed, the Subaru did not adequately slow to avoid the collision. The driver reported no effective forward collision warning or automatic emergency braking intervention. Whether the system detected the equipment or attempted braking is UNKNOWN. The impact caused extensive front-end damage and airbag deployment. The driver was pregnant, and two children, ages [XXX] and [XXX], were passengers. All occupants and the unborn child were placed at significant risk of serious injury. Whether any EyeSight warnings, fault messages, or diagnostic trouble codes were present before impact is UNKNOWN. The suspected malfunction has not been reproduced or confirmed by a dealership or independent service center. A manufacturer engineering inspection has not been confirmed. Photographs document the accident scene and vehicle damage. The extent of police or insurance technical inspections and the vehicle's current availability for inspection are UNKNOWN. An investigation is requested into Adaptive Cruise Control, forward object detection, and Pre-Collision Braking, including preservation and review of available electronic collision data to establish why the systems did not prevent or effectively mitigate the collision. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (F

Filed Feb 11, 2026 · Acceleration, Driver assistance · MI

I have had my lane assist come on by its self a few times, which is very dangerous because it seems to take over and will pull on the steering wheel. I’ve also brought my car back to the dealership a handful of times to have it hooked up to a computer and also someone ride with me because the car will either hesitate to accelerate or stutters and doesn’t seem to want to go when I am between 20-30 miles an hour. Other times when I’m at a light or stop sign it hesitates also. I was told there was nothing wrong with it and they reprogrammed to transmission but it didn’t help at all.

Filed Jan 25, 2026 · Driver assistance · WA · crash

I leased a 2019 Subaru Ascent (VIN: [XXX] ), which is equipped with the EyeSight driver-assist system. In the Spring of 2019, while driving in a parking lot at night with low visibility and snow, the vehicle struck a pole. Despite the imminent collision, the EyeSight system failed to engage Pre-Collision Braking or provide any audible/visual warning to alert me of the obstacle. The system did not disengage or indicate it was unavailable due to weather; it simply failed to function, resulting in a collision. Following this incident, I immediately contacted Subaru of America to report the failure. At that time, Subaru representatives denied any defect existed and stated the system was not at fault. I have recently learned that this vehicle is part of the [XXX], et al. v. Subaru of America, Inc. class action 9[XXX]), which addresses defects in the Pre-Collision Braking and Lane Keep Assist systems. Crucially, I was never notified of this class action or the associated defect by Subaru. I received no mail, email, or other communication alerting me to this safety risk or my eligibility for repair/reimbursement. I only discovered this information via a third-party news source after the settlement claim deadline of September 27, 2025, had passed. Upon contacting the Settlement Administrator and Subaru of America in January 2026, I was told that because the administrative deadline has passed, no remedy is available. Subaru is effectively refusing to address a known safety defect on a confirmed affected VIN solely due to a missed deadline that I was never informed of. I am filing this complaint to document the failure of the EyeSight system and Subaru’s failure to properly notify lessees/owners of known safety defects. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jun 8, 2025 · Driver assistance · OR

The lane assist failed by over correcting while I have my hands on the steering wheel. It over corrects to the center lane when you are driving with normal behavior. This can cause a collision if it were to over correct while a car was there, this is also easily reproducible in my car.

Filed May 7, 2024 · Driver assistance, Electrical · 19,737 miles · IA

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.

Filed Nov 30, 2022 · Acceleration, Driver assistance · MO

Adaptive Cruise Control, Automatic Emergency Braking, Forward Collision Warning, Lane Departure Warning, Lane Keeping Assistance, Eye Sight, RAB, some ! Symbol, and check engine light are all on and not working. You know everything that makes a Subaru. This is not the first or even second time. We are on the fourth instance of this happening. We live 2+ hrs away from the closest dealers. The first few times it occurred, we called to make a appointment. Each time was always a few weeks out and the issue would clear a day or two before. This last time has been going on for 6 weeks. We both work full time and have a very sick kid so making a appointment is hard. This last time I asked if I can drop in just for a scan due to being in town for an appointment. Was met with we are backed up with way to many repairs. Also it would not be fair to any other people. It is most likely your gas cap. I have made sure the cap is tight as it can get every time from the first time it occurred. So all safety features on the Subaru Ascent just stop working if the cap is not tight. Not only is this a major safety issue their QA is asleep at the wheel. Known issue, just check the forums.

Filed May 3, 2022 · Driver assistance · CA

It is actually the lane centering system. Even a gentle hand on the wheel, which is required, will gradually pull you to one side of the lane. When ever you lift your hand or when the car thinks you have gone to far one way or the other it will throw you into the other lane, into a car, motorcycle, semi, or even off a cliff. This system is so dangerous I cant believe it hasnt been recalled. If using this you will get thrown one way or the other several times during most trips. Dealer states its normal and I got that in writing.

Filed Oct 27, 2021 · Driver assistance · NM

The lane keeping assist pull abruptly into the other traffic lane when traveling on the highway for example when on a 4 lane road with two lane in the same direcstion and passing a semi truck the steering assist abruptly pulls the car into the truck's lane and requires immediate hard handed reaction to keep the car from hitting the truck. The lane assist on this subaru vehicle is more dangerous than it is helpful. Subaru is terribly un response to request for help although the car is less than 1-year old and has a mult-year extended warranty---subaru's customer service is the worst we've experienced. BTW my son's Honda Acura's lane assist is excellent!

Filed Sep 15, 2021 · Driver assistance, Steering · KS

On several occasions while using the lane centering feature, vehicle has taken a sudden violent move to the left into the on coming lane. No warning lights illuminated. Problem hasn’t been replicated by dealer.

Filed May 14, 2021 · Driver assistance, Steering · 140 miles · CA

Lane assist with cruise control over corrects. On multiple occasions while on the freeway using cruise control the lane assist pulled me into the other lane into other vehicles. I have almost hit other vehicles. The pull is too strong and crosses lanes. If not fixed by subaru, accidents will occur.