2020 Subaru Ascent transmission & drivetrain problems

Related recalls

• Recall 21V955000Dec 9, 2021198,255 vehicles
  POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM) · POWER TRAIN:DRIVELINE:CHAIN/BELT

  Subaru of America, Inc. (Subaru) is recalling certain 2019-2020 Ascent, 2020 Legacy and Outback vehicles. A programming error in the Transmission Control Unit (TCU) may allow the clutch to engage before the drive chain is completely clamped.

  Risk: An improperly secured drive chain may slip and break, causing a loss of drive power and increasing the risk of a crash.

  Remedy: Dealers will reprogram the TCU, inspect TCU data for chain slip, and visually inspect the chain guide. If evidence of chain slippage or damage is found, the transmission will be replaced. Repairs will be performed free of charge. Owner notification letters were mailed August 19, 2022. This recall includes all vehicles previously recalled under 19V-855. Vehicles previously recalled under 19V-855 will need to have the new remedy performed for this recall once available. Owners may contact Subaru customer service at 1-844-373-6614. Subaru's number for this recall is WRK-21.

What owners say

1. Filed Aug 27, 2026145,000 miSCTransmission & Drivetrain

   The contact owns a 2020 Subaru Ascent. The contact stated that while driving at an undisclosed speed, the vehicle was skipping. The failure was recurrent. The contact associated the failure with NHTSA Campaign Number: 21V955000 (Power Train); however, the dealer informed the contact that the recall repair was completed on July 15, 2025. The contact was the vehicle owner on that date and stated that the vehicle was never taken to the dealer for the recall repair. The dealer…

   NHTSA complaint #11759965 · source
2. Filed Aug 20, 2026COTransmission & Drivetrain

   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…

   NHTSA complaint #11758390 · source
3. Filed Jul 29, 2026FLTransmission & Drivetrain

   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…

   NHTSA complaint #11753615 · source
4. Filed May 15, 2026AZElectrical SystemEngineTransmission & Drivetrain

   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…

   NHTSA complaint #11738197 · source
5. Filed May 4, 202682,000 miARTowedSteeringTransmission & Drivetrain

   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…

   NHTSA complaint #11735635 · source
6. Filed Apr 20, 2026DCFuel, Hybrid & EV PropulsionTransmission & Drivetrain

   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…

   NHTSA complaint #11732360 · source
7. Filed Mar 10, 2026NVTransmission & Drivetrain

   Vehicle: 2020 Subaru Ascent (Build Date: March 2020) Component: Power Train – Automatic Transmission – Hydraulic Pressure Sensor / Wiring Harness The vehicle developed a flashing "Transmission Service" warning and check engine light. It was inspected by a certified technician at Lithia Reno Subaru. Diagnostic scan identified multiple transmission-related codes including P0137, P0700, P2096, P1867, P0867, P2723, and P0841. The technician documented the root cause as: "Found…

   NHTSA complaint #11723189 · source
8. Filed Feb 21, 2026CAEngineTransmission & Drivetrain

   Oil Leak(s) (found cam carriers leaking, front timing cover leaking, oil cooler leaking, upper and lower oil pan leaking. recommend engine reseal). Massive oil leaks found in car due to RTV sealant. Subaru uses RTV silicone sealant (formed-in-place gaskets) instead of traditional rubber gaskets for many sealing surfaces (cam carriers to heads, timing cover, oil pans, etc.). Transmission failure at 37,000miles which needed replacement. In dealership service for 52 days at…

   NHTSA complaint #11719539 · source
9. Filed Feb 11, 2026MIDriver Assistance & Safety TechAcceleration & Cruise ControlTransmission & Drivetrain

   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.…

   NHTSA complaint #11717228 · source
10. Filed Jan 2, 2026PATransmission & Drivetrain

    The CVT transmission has failed and been replaced three times despite proper maintenance. Subaru has replaced the transmission multiple times under warranty, but the failure continues to recur. •First CVT replacement at 50,542 miles •Second CVT replacement at 88,175 miles •Third CVT replacement at 92,832 miles This shows repeat failure, not wear-and-tear. It is a safety risk: The vehicle hesitates and loses power intermittently, which creates a safety risk when accelerating…

    NHTSA complaint #11708448 · source
11. Filed Jun 12, 202561,900 miCAEngineTransmission & Drivetrain

    The contact owns a 2020 Subaru Ascent. The contact stated that while depressing the accelerator pedal to make a turn, the vehicle hesitated to respond. There was no warning light illuminated. The vehicle was taken to the dealer, but was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 61,900.

    NHTSA complaint #11666552 · source
12. Filed May 2, 2025UTTransmission & Drivetrain

    My 2020 Subaru Ascent experienced a sudden failure of critical safety systems due to CVT fluid leaking through the transmission pressure switch into multiple electrical components. This fluid leak damaged several wire harnesses and the Engine Control Module (ECM). The check engine light came on and all Eyesight safety features disabled. Subaru has confirmed this will cost over $9,400 to repair. This issue appears to be related to known Subaru Technical Service Bulletins,…

    NHTSA complaint #11658449 · source

Source: U.S. National Highway Traffic Safety Administration (NHTSA) Office of Defects Investigation public data. Complaints are submitted by owners and are not verified by NHTSA or by us; a complaint does not prove a defect exists. View this vehicle on NHTSA.gov Methodology