101 of the
1,331 complaints filed about the Subaru Ascent
are about the driver-assist systems —
8% of everything owners reported.
The worst model year for it is 2021.
101
Complaints
8%
Share of all complaints
19
Crashes
0
Fires
Driver Assist & Collision Avoidance complaints by model year
All the safety systems become disabled and check Engine light goes on because transmission fluid is being pumped Out of a faulty secondary pressure sensor part 31878aa020,( defective and replaced with 31878aa021), into the engines wiring at the car computer, transmission computer, and bulkhead connector in fuse box causing all sorts of engine codes. The setting of the engine code closes all the vehicles driver safety systems and changes the dynamic of the drivers driving experience. As the problem gets worse, it can render the car powerless on roads and highways making operation dangerous. I have my car parked in front of the house with the battery and electrical connectors unplugged. This problem is covered by one or more recalls and safety campaigns, but subaru refuses to fix mine and other peoples that I found on Facebook. Someone online listed a $6500.00 repair estimate. They just had it repossessed instead. This part causes the pressure differences that cause the jerky ride and is specifically alluded to in the recall, plus subaru even changed the part because it was defective.
NHTSA complaint #11755268 — an unverified report by a vehicle owner.
NHTSA Vehicle Safety Complaint Vehicle: 2019 Subaru Ascent VIN: [XXX] Mileage: 72,093 miles I am submitting this complaint because my 2019 Subaru Ascent experienced a serious transmission-related electrical failure that may represent a broader safety defect. Sewell Subaru of Dallas diagnosed an internal failure of a transmission pressure sensor. According to the dealership’s written report, the failed pressure sensor allowed transmission fluid to leak into the electrical wiring harness. The transmission fluid then migrated through the wiring and into the bulkhead harness. The dealership advised that the fluid contamination had affected multiple parts of the vehicle’s electrical system and recommended replacement of the transmission wiring harness, engine wiring harness, bulkhead harness, Engine Control Module (ECM), Transmission Control Module (TCM), and related components. Because the wiring harnesses are routed throughout the engine compartment and vehicle, the repair also requires extensive disassembly of the vehicle, including disconnecting and removing numerous engine compartment components to access and replace the contaminated harnesses. The estimated repair cost was approximately $12,000. I also have video documentation of the dealership technician performing the inspection and explaining the transmission fluid contamination and migration through the wiring system. I am willing to provide the video, the dealership's written diagnosis, repair estimate, photographs, and any additional supporting documentation upon request. My vehicle falls within the published VIN range associated with Subaru recall WUV-07, which involved the CVT hydraulic pressure sensor harness and transmission hydraulic pressure system. That recall was later superseded by WRK-21. I understand that the published recall addresses electrical resistance and transmission hydraulic pressure readings rather than transmission fluid leakage. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA complaint #11754232 — an unverified report by a vehicle owner.
On XXX, I was operating my vehicle heading Pocono PA, on I-80 in [XXX]. At approximately mile point 142.4, the vehicle's onboard Forward Collision Avoidance System (FCAS) suddenly and unexpectedly activated without any obstruction, hazard, or vehicle ahead. The abrupt, automated braking and system intervention caused an immediate loss of vehicle control, forcing the car into a 180-degree spin. The violent shift in momentum caused the vehicle to roll over on the highway before coming to a stop. No other vehicles were involved in the initiation of the crash. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA complaint #11749348 — an unverified report by a vehicle owner.
Traveling in my 2025 Subaru Ascent with cruise control set at 50mph. Bright sunny day, no shadows on the road and no vehicles in front of me. My vehicle slammed on the brakes out of nowhere. Held deceleration about 5-7 seconds and then resumed cruising speed. The road I was on is generally busy. I got very lucky there was no one behind me or I would have been rear ended.
NHTSA complaint #11746540 — an unverified report by a vehicle owner.
I am reporting a repeat safety concern involving a 2020 Subaru Ascent. The vehicle was involved in two separate collisions after failing to decelerate as expected following normal brake pedal application. The first incident occurred on January 26, 2026. While approaching a traffic signal, I applied the brakes under normal driving conditions. The vehicle did not slow as expected and struck the rear of another vehicle. Property damage occurred, but no injuries were reported. The second incident occurred on May 5, 2026. While approaching a stop sign at approximately 35 mph, I again applied the brakes under normal driving conditions. The vehicle did not decelerate as expected and entered the intersection, colliding with a vehicle traveling perpendicular to my direction of travel. Both vehicles were towed. No injuries were reported. During both incidents, there were no forward collision warnings, automatic emergency braking interventions, or other alerts observed prior to impact. Following the second collision, the vehicle was inspected by an independent technician. Brake components inspected were found to be within serviceable condition and no evidence of neglect or improper maintenance was noted. During inspection, abnormal brake pedal behavior was observed, including continued downward pedal travel while steady pressure was applied. The technician documented that the reported condition was not consistent with normal braking performance and stated that an intermittent hydraulic and/or brake assist related issue could not be ruled out. The vehicle has been regularly maintained according to manufacturer recommendations. Due to the repeat nature of the condition, the lack of warning or intervention from safety systems, and the occurrence of two collisions despite normal brake application, I believe this condition represents a significant safety risk. The vehicle has since been declared a total loss and may be available for further inspection.
NHTSA complaint #11740848 — an unverified report by a vehicle owner.
I am reporting a repeat safety concern involving a 2020 Subaru Ascent. The vehicle was involved in two separate collisions after failing to decelerate as expected following normal brake pedal application. The first incident occurred on January 26, 2026. While approaching a traffic signal, I applied the brakes under normal driving conditions. The vehicle did not slow as expected and struck the rear of another vehicle. Property damage occurred, but no injuries were reported. The second incident occurred on May 5, 2026. While approaching a stop sign at approximately 35 mph, I again applied the brakes under normal driving conditions. The vehicle did not decelerate as expected and entered the intersection, colliding with a vehicle traveling perpendicular to my direction of travel. Both vehicles were towed. No injuries were reported. During both incidents, there were no forward collision warnings, automatic emergency braking interventions, or other alerts observed prior to impact. Following the second collision, the vehicle was inspected by an independent technician. Brake components inspected were found to be within serviceable condition and no evidence of neglect or improper maintenance was noted. During inspection, abnormal brake pedal behavior was observed, including continued downward pedal travel while steady pressure was applied. The technician documented that the reported condition was not consistent with normal braking performance and stated that an intermittent hydraulic and/or brake assist related issue could not be ruled out. The vehicle has been regularly maintained according to manufacturer recommendations. Due to the repeat nature of the condition, the lack of warning or intervention from safety systems, and the occurrence of two collisions despite normal brake application, I believe this condition represents a significant safety risk. The vehicle has since been declared a total loss and may be available for further inspection.
NHTSA complaint #11740848 — an unverified report by a vehicle owner.
FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
In 2024, 2025, and 2026, I have had 2 incidents in each year where the cruise control is set to 60 to 65 mph and the cruise control then accelerates the car past 100 mph. When this occurs, tapping the break does NOT disengage the cruise control. All 6 times I have had to slam the breaks to a full dead stop while the car tries to accelerate anyway. April 4, 2026 and April 14, 2026 are the most recent occurrences and all occurrences so far for this issue have been during a downhill road incline. The dealer has dismissed the problem every time and has been unable to fix or reproduce the problem on demand. The random frequency of this problem can easily lead to a significant accident for the driver or others in the vicinity. And the lack of resolution from the Subaru dealer has lead me to report the issue here in hopes that if this is occurring for other vehicles that the company takes an actual resolution to solve the issue in their cruise control function.
NHTSA complaint #11731662 — an unverified report by a vehicle owner.
My eyesight camera keeps failing, it just started like a week ago I had it scanned and it is saying there is an error with the eyesight camera, I have not had an issue with it until now.
NHTSA complaint #11728873 — an unverified report by a vehicle owner.
My eyesight camera keeps failing, it just started like a week ago I had it scanned and it is saying there is an error with the eyesight camera, I have not had an issue with it until now.
NHTSA complaint #11728873 — an unverified report by a vehicle owner.
My eyesight camera keeps failing, it just started like a week ago I had it scanned and it is saying there is an error with the eyesight camera, I have not had an issue with it until now.
NHTSA complaint #11728873 — an unverified report by a vehicle owner.
I was driving and I got check engine light and all safety features disabled while I was in the freeway, luckily I was able to drive to nearby Subaru dealer for inspection and I found out that there was a recall on the engine for this vehicle and when I contacted the manufacturer they asked me to take it for diagnostics and I did that at a Subaru retailer, but the case manager told me that this recall is being completed for the previous owner of the vehicle and cannot help me with anything, which was never disclosed when I was buying the vehicle.
NHTSA complaint #11726964 — an unverified report by a vehicle owner.
I was driving and I got check engine light and all safety features disabled while I was in the freeway, luckily I was able to drive to nearby Subaru dealer for inspection and I found out that there was a recall on the engine for this vehicle and when I contacted the manufacturer they asked me to take it for diagnostics and I did that at a Subaru retailer, but the case manager told me that this recall is being completed for the previous owner of the vehicle and cannot help me with anything, which was never disclosed when I was buying the vehicle.
NHTSA complaint #11726964 — an unverified report by a vehicle owner.
2022 Subaru Ascent. Noticed progressive strong odor in the car. After rain had significant fluid accumulation in the front passenger ceiling, inside front passenger door (sloshing), and wet carpets on the floor on the passenger side. Serviced by Subaru dealer water specialist who reported (1) clogged moonroof drains and "popped off connector" leading to flooding of the entire front passenger ceiling; (2) detached vapor barrier in the passenger door allowing water to collect inside the door and drain into the car; (3) significant concern for mold based on the extent of damage and odor accumulating over time. Told by dealer the drains could be unclogged and they'd repair the popped off connection with a zip-tie fastener since it was not tight enough before, re-affix the vapor barrier in the door, but otherwise their expressed SAFETY concern related to the extent of suspected mold and the poor effects that would have on the health of us and our children. Told the mold was unlikely to fully remediate despite usual efforts, as it creates a fibrous web that is very difficult to ever fix, and the recommendation was that we probably not drive the car again. Told no water damage of any etiology is covered under any Subaru warranty. Dealer refused at first to give documentation about the service or recommendations. Later gave but left off mold documentation - we requested they add it back on, if we choose to sell or trade in the vehicle later we refuse to do so without the mold and associated health risks being public knowledge for a future owner of this vehicle. We also reported that our Subaru Eyesight (collision avoidance system) had been intermittently shorting out, online reports show this can be related to drain floods. No report/update thus far by Subaru on this, also not included in report. We filed a complaint with Subaru of America but have not been called back despite two weeks of repeated calls to them for an update.
NHTSA complaint #11725797 — an unverified report by a vehicle owner.
2022 Subaru Ascent. Noticed progressive strong odor in the car. After rain had significant fluid accumulation in the front passenger ceiling, inside front passenger door (sloshing), and wet carpets on the floor on the passenger side. Serviced by Subaru dealer water specialist who reported (1) clogged moonroof drains and "popped off connector" leading to flooding of the entire front passenger ceiling; (2) detached vapor barrier in the passenger door allowing water to collect inside the door and drain into the car; (3) significant concern for mold based on the extent of damage and odor accumulating over time. Told by dealer the drains could be unclogged and they'd repair the popped off connection with a zip-tie fastener since it was not tight enough before, re-affix the vapor barrier in the door, but otherwise their expressed SAFETY concern related to the extent of suspected mold and the poor effects that would have on the health of us and our children. Told the mold was unlikely to fully remediate despite usual efforts, as it creates a fibrous web that is very difficult to ever fix, and the recommendation was that we probably not drive the car again. Told no water damage of any etiology is covered under any Subaru warranty. Dealer refused at first to give documentation about the service or recommendations. Later gave but left off mold documentation - we requested they add it back on, if we choose to sell or trade in the vehicle later we refuse to do so without the mold and associated health risks being public knowledge for a future owner of this vehicle. We also reported that our Subaru Eyesight (collision avoidance system) had been intermittently shorting out, online reports show this can be related to drain floods. No report/update thus far by Subaru on this, also not included in report. We filed a complaint with Subaru of America but have not been called back despite two weeks of repeated calls to them for an update.
NHTSA complaint #11725797 — an unverified report by a vehicle owner.
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.
NHTSA complaint #11717228 — an unverified report by a vehicle owner.
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)
NHTSA complaint #11713281 — an unverified report by a vehicle owner.
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)
NHTSA complaint #11713281 — an unverified report by a vehicle owner.
FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
Uncommanded maximum braking with simultaneous high-voltage and low-voltage shutdown. Vehicle is not safe in Florida with puddles or any types of ongoing obstructions vehicle shuts down in the middle of traffic if it perceives you do not match Google maps
NHTSA complaint #11702898 — an unverified report by a vehicle owner.
Uncommanded maximum braking with simultaneous high-voltage and low-voltage shutdown. Vehicle is not safe in Florida with puddles or any types of ongoing obstructions vehicle shuts down in the middle of traffic if it perceives you do not match Google maps
NHTSA complaint #11702898 — an unverified report by a vehicle owner.
I was entering an intersection to make a left-hand turn. I was driving at a low speed. My foot was pressing the accelerator and the car entered the intersection. In the middle of the intersection, the car wheels suddenly stopped turning. There was nothing in front of the car. Cars behind me began honking since my car stopped suddenly and unexpectedly while I saw a notice displayed on the car messaging, but I do not know what it said. I am unsure if the car engine turned off or not, but I remember turning on my hazard lights, putting the car in park and pressing the start button. I was able to drive out of the intersection to a safe location and turned off the car engine. I restarted the car and drove immediately to the dealer where I purchased the car from for them to evaluate it. It is currently being submitted for diagnostics at the car dealer. I told them I would make this safety report while I waited.
NHTSA complaint #11700833 — an unverified report by a vehicle owner.