182 of the
1,331 complaints filed about the Subaru Ascent
are about the transmission —
14% of everything owners reported.
The worst model year for it is 2019.
182
Complaints
14%
Share of all complaints
2
Crashes
0
Fires
Transmission & Drivetrain complaints by model year
1. The vehicle is experiencing a transmission malfunction/failure. The dealership was able to replicate the issue and confirm the malfunction, which caused the check engine light to illuminate. The vehicle is currently being evaluated by the dealership, and any failed components should be available for inspection upon request while the vehicle remains in their possession. 2.The transmission malfunction is affecting the vehicle's ability to accelerate, maintain speed, and operate predictably. This creates a potential safety risk when the vehicle loses power or experiences unexpected changes in operation while driving, particularly in traffic or at highway speeds. The concern is heightened because transmission failure can leave the vehicle unable to safely continue operating and can cause collisions with other vehicles on the road. 3.Yes. The dealership was able to reproduce the issue, which caused the check engine light to illuminate and confirmed that there is an active problem requiring further diagnosis/repair. 4.The vehicle has been inspected and evaluated by the Subaru dealership/service center. To my knowledge, it has not been inspected by police or insurance representatives. Subaru of America has reviewed my case and the repair history but has declined assistance with the repair or to open a case. 5.Yes. The dealership was able to reproduce the issue, which caused the check engine light to illuminate. The transmission problem was also associated with operation that prompted me to have the vehicle inspected. The check engine light illuminated when the dealership replicated the condition. This current transmission is a replacement transmission done by Subaru do to a previous recall of the same issue. The current transmission only has 83,000 miles on it.
NHTSA complaint #11758390 — an unverified report by a vehicle owner.
The vehicle has 178k miles on it currently. I had to have a transmission and transfer case replaced at 68k miles. Done by Subaru. At 168k miles I had to have a new front pump in the transmission case replaced. Repair done by Subaru. Now at 178k miles the second replacement transmission has completely failed and needs replaced.
NHTSA complaint #11756882 — an unverified report by a vehicle owner.
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.
My 2019 Subaru Ascent Limited had a safety recall that was related to a CVT transmission issue. That safety recall was addressed by Sewell Subaru (Dallas, TX) in January of 2025. This past Wednesday, July 29, I was driving on a state highway on my way to work from my residence. Not even two miles away from my residence, I felt a jerk and a loud "thud". That was followed by loss of power in that the vehicle just was rolling, but no power from the gas. I was able to safely maneuver onto a the shoulder and stop the vehicle. Within minutes, I noticed a puddling of a large amount of fluid that I could easily recognize was not oil. The vehicle was towed back to Sewell Subaru this past Saturday and I was notified today that the CVT belt snapped and it caused a hold in the transmission case, which caused the fluid to leak. The service advisor also mentioned that Subaru is not wanting to cover the replacement and that they are citing that the reason is that Subaru records are showing irregular servicing done by a Subaru service center. This issue has nothing to do with routine maintenance, or where I get those, and has everything to do with the catastrophic failure of the very same component that was at the heart of their known safety recall issue.
NHTSA complaint #11754594 — an unverified report by a vehicle owner.
The vehicle exhibited transmission slippage but did not provide any warning lights or other symptoms . About 100 miles later, the Automatic Transmission Oil light came on (flashing YELLOW), and all other systems light up (both Yellow and Red) disabling front collision, auto vehicle hold, RAB, etc. Pulled to a safe location and left in park for 10-15 minutes per guidance. Had towed to dealer to determine issue, transmission failure on a 3.5 yr old vehicle with 80,019 miles.
NHTSA complaint #11753964 — an unverified report by a vehicle owner.
The Transmission is slipping on my 2020 Ascent. I had the recall wrk-21 performed in July of 2025. Over the last 6 months the car has been hesitant to go at low speeds and shakes at high speeds. Over the last month the transmission started to slip while accelerating , especially up hill. There would be a grinding noise and RPMs would jump. I took it to the dealer and they confirmed it was the transmission via camera test. I called Subaru of America for goodwill help with the cost knowing that there is a know issue with the transmission. They refused due to the mileage, 121,010. •What component or system failed or malfunctioned, and is it available for inspection upon request? The transmission is slipping •How was your safety or the safety of others put at risk? The car is hesitant to go from a starting position. The car will jerk back and forth when trying accelerate when merging or crossing a road. I am also very concerned of catastrophic failure at high speeds. •Has the problem been reproduced or confirmed by a dealer or independent service center? The dealer has confirmed the transmission is bad via camera teat. •Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? Just the dealership •Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? No dash lights just the feeling and sounds.
NHTSA complaint #11753615 — an unverified report by a vehicle owner.
My 2021 Subaru Ascent (40,000 miles) suffered multiple major mechanical failures that pose ongoing safety concerns: 1. Engine Oil Leak: The vehicle developed an active engine oil leak at 20,000 miles, posing a risk of fluid contacting hot exhaust/engine components under the hood or causing low oil levels during operation. Repair time more than 35 days due to parts not available. 2. Loose Factory Engine Mounts: At 25,000 miles, excessive engine shifting, vibration when braking, the dealer discovered loose engine mounts. 3. Transmission Valve Body Failure: At 40,000 miles The transmission Valve Body Failure and need replacement.
NHTSA complaint #11753410 — an unverified report by a vehicle owner.
The contact owns a 2021 Subaru Ascent. The contact stated that while driving at an undisclosed speed, the vehicle started to stall, and the transmission failed to properly operate. The vehicle was pulled over to a nearby shop and was advised to take the vehicle back to the facility that performed the oil changes. Several days later, the contact's husband test drove the vehicle and was able to duplicate the failure. The vehicle was towed to a dealer to be diagnosed, and metal shavings were found in the oil. The dealer determined that the CVT transmission needed to be replaced. The vehicle was being repaired. The manufacturer was notified of the failure. The failure mileage was 101,541.
NHTSA complaint #11752723 — an unverified report by a vehicle owner.
Noticed my car shifting incorrectly since 66,000 miles. At approximately 68,800 miles transmission begin to fail. At a stop sign I pulled out before oncoming traffic with what should have been plenty of time, but transmission failed. It seemed to have had chain slip; completely stopping the car when I was in oncoming traffic. I put the pedal to the floor it caught, and whipped me around the corner. After that it was doing the same thing consistently until I parked it at my residence.
NHTSA complaint #11750736 — an unverified report by a vehicle owner.
The contact owns a 2022 Subaru Ascent. The contact stated that while driving at an undisclosed speed, several unknown warning lights illuminated. The vehicle experienced a loss of power steering assist, the speedometer was inoperable, and the transmission failed to shift into gear. The vehicle was taken to an independent mechanic, who inspected the brakes and reset the check engine warning light, but the failure persisted. The vehicle was then taken to the dealer, who determined that the rear radar sensor module beneath the rear bumper had corrosion from car wash or road salt. The dealer replaced the rear radar sensor module and sealed it with silicone. The manufacturer was made aware of the failure, and a case was opened. The failure mileage was approximately 60,000.
NHTSA complaint #11746149 — an unverified report by a vehicle owner.
While pulling up to a drive thru window the vehicle shuddered and the engine shut off. I lost all power steering and had to come to a stop, shift into park, then restart the engine. No check engine lights or warnings illuminated. There were no status messages to indicate what caused it to shut off. Also the driver side mirror shakes a lot, just like all the other reports say.
NHTSA complaint #11740740 — an unverified report by a vehicle owner.
While cruising on a 2-lane road or a freeway, the vehicle will cross over the adjacent line, either left or right. This generally happens between 50 to 75 mph. The event happens either when cruise control is on or off. Wind is not necessarily the problem. The solution requires one to take the necessary immediate steering correction. At times, the departure from the lanes may repeat. This may be a temporary correction. This may create a head-on collision if not immediately correctly manually. VERY DISTURBING!
NHTSA complaint #11738307 — an unverified report by a vehicle owner.
The pressure sensor coming out of the transmission has failed, and it's pushed transmission fluid throughout the engine harness, transmission harness, the bull harness in the dash and the 02 sensors. All of those have been damaged. The car is now unsafe to drive due to the pressure sensor failing. This information comes directly from the Subaru dealership. There was nothing prior to this that indicated there was a problem. I bought the car from a certified dealership 8 months ago and it was a certified pre owned vehicle.
NHTSA complaint #11738197 — an unverified report by a vehicle owner.
On 9-May, 2026, the vehicle was driven during the morning with no warning lights or indication of component failure. Vehicle was parked on the owner's driveway at approximately 13:00. Approximately 15:40 I started the Ascent’s engine, let it idle for about 60 seconds, buckled up and scanned dashboard and rearview mirror. No warning lights or any fault indication. Approximately 15:42, I put the vehicle in reverse and released the brake Approximately 15:42:30 the vehicle exited the driveway Approximately 15:43 there was a shudder on [XXX] (heading north); the dash lit up with multiple warning lights; the check engine warning illuminated and the ATOIL Temp warning light engaged. At this time, the vehicle rolled down a hill, un-commanded, and only with repeated pumping of the brake did the vehicle stop. Approximately 15:49 I was able to park the vehicle, engaging the hazard flashers and exited the vehicle. While no one was injured in this instance, had this happened on a highway there would have been insurance losses and potential injuries. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA complaint #11736826 — an unverified report by a vehicle owner.
The contact owns a 2020 Subaru Ascent. The contact stated that while driving on several occasions at various speeds, the steering wheel became loose and then tightened inadvertently. The vehicle was taken to a dealer where the failure could not be replicated. The contact also stated that on several occasions while driving, the vehicle puttered and a grinding noise was heard emanating from the engine compartment. The vehicle was towed to a dealer where it was diagnosed during the first visit to be the transmission module. The vehicle was repaired, but the failure persisted sporadically. The vehicle was taken back to the same dealer on the second visit where it was diagnosed that the transmission needed to be replaced. The vehicle was repaired, but the failures reoccurred approximately 5,000 miles later. The vehicle was taken to the same dealer on the third visit where it was diagnosed that the tie rod end and bushing needed to be replaced. The vehicle was repaired, but the failure persisted. The vehicle was then taken to the same dealer on the fourth visit where the failure could not be replicated. The vehicle towed to the same dealer on a fifth occasion where it was diagnosed that the transmission needed to be replaced. The vehicle was not repaired as of yet. The manufacturer was notified of the failure and a complaint was filed. The failure mileage was approximately 82,000.
NHTSA complaint #11735635 — an unverified report by a vehicle owner.
My 2020 Subaru Ascent struggles to retain power when accelerating, especially from stopping and especially when the fuel is low. The vehicle stalls or loses some power when trying to accelerate. The check engine light is not on and there is no other indication that there is a problem with the vehicle. I have discussed it thoroughly with my mechanic and we both think it sounds like a fuel pump issue. He looked at the other Subaru recalls and thinks my vehicle should be included in the other Subaru fuel pump recall (NHTSA ID Number: 21V587000). Does my vehicle qualify for this fuel pump recall? Thank you.
NHTSA complaint #11732360 — an unverified report by a vehicle owner.
I am submitting this complaint regarding a 2021 Subaru Ascent that I purchased new from Herb Gordon Subaru in Maryland. The incident occurred while driving on I-95 at approximately 75 mph with my family, including children, in the vehicle. The vehicle experienced a sudden and complete powertrain failure without any prior warning indicators. This created an immediate and serious safety risk on a busy highway. Fortunately, we were able to safely maneuver the vehicle out of traffic and avoid a collision. Prior to this incident, the vehicle had undergone regular maintenance, and there were no indications of any imminent powertrain failure. While a routine fluid service had been recommended, it was not presented as urgent and was planned to be completed at a later time. Following the incident, I conducted further research and learned that the vehicle had previously been subject to a manufacturer recall involving engine harness/ECM-related issues, which had been completed prior to the sale. This material information was not disclosed to me at the time of purchase and only came to my attention after the failure occurred. Had I been informed of this recall history at the time of purchase, it would have reasonably influenced my decision-making, and I would have reconsidered or sought further clarification before proceeding. The estimated repair cost is approximately $11,000. Subaru of America has offered $2,000 in goodwill assistance, which I consider inadequate given the severity of the failure and the associated safety concerns. This matter raises concerns regarding non-disclosure of material recall history at the time of sale, potential underlying defect, and possible breach of the implied warranty of merchantability. In addition this recall is not even recorded in the NHTSA website.
NHTSA complaint #11731955 — an unverified report by a vehicle owner.
The contact owns a 2022 Subaru Ascent. The contact stated that while operating the vehicle, there was a whining sound coming from the transmission, and the vehicle failed to properly accelerate. The vehicle was slowly driven to the local mechanic, who diagnosed the vehicle and determined that the transmission had failed and needed to be replaced. The transmission was replaced, and the vehicle was repaired. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was approximately 115,000. The VIN was not available.
NHTSA complaint #11731928 — an unverified report by a vehicle owner.
I had catastrophic transmission failure. The car was completely inoperable. Thankfully this only happened in a parking lot. If this were yo happen while merging into traffic it could have been very dangerous. This was the second cvt in this vehicle. The 1st transmission was replaced around 52kmiles. The second transmission lasted not even 13 months sndless than 15k miles. Subaru replaced the transmission for a 3rd time at a cost of 1k to me. I no longer have the car.
NHTSA complaint #11730964 — an unverified report by a vehicle owner.