2021 Subaru Legacy problems, complaints & recalls

2021 Subaru Legacy recalls (3)

• Recall 24V227000Mar 22, 2024118,723 vehicles
  AIR BAGS:SENSOR:OCCUPANT CLASSIFICATION:FRONT PASSENGER

  Subaru of America, Inc. (Subaru) is recalling certain 2020-2022 Outback and Legacy vehicles. A capacitor in the sensors for the Occupant Detection System (ODS) may crack and short circuit, which can prevent the front passenger air bag from deploying in a crash.

  Risk: An air bag that does not deploy during a crash can increase the risk of injury.

  Remedy: Dealers will replace the ODS sensors on the front passenger seat, free of charge. Owner notifications were mailed February 3, 2025. Owners may contact Subaru customer service at 1-844-373-6614. Subaru's number for this recall is WRA-24.

• Recall 23V755000Nov 9, 202395,830 vehicles
  POWER TRAIN:AUTOMATIC TRANSMISSION:PARK/NEUTRAL START INTERLOCK SWITCH

  Subaru of America, Inc. is recalling certain model year 2021 Crosstrek, 2022 Forester, 2021-2023 Legacy, and Outback vehicles. An insufficient weld may allow water to enter the inhibitor switch, causing it to fail.

  Risk: An inoperative inhibitor switch may prevent the reverse lights from illuminating and the rearview camera image from displaying, increasing the risk of a crash.

  Remedy: Dealers will replace the inhibitor switch, free of charge. Owner notification letters were mailed January 8, 2024. Owners may contact Subaru customer service at 1-800-782-2783. Subaru's number for this recall is WRQ-23.

• Recall 22V485000Jul 8, 2022182 vehicles
  POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM) · POWER TRAIN:DRIVELINE:CHAIN/BELT

  Subaru of America, Inc. (Subaru) is recalling certain 2020-2021 Outback and Legacy 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 are expected to be mailed August 24, 2022. Owners may contact Subaru's customer service at 1-844-373-6614. Subaru's number for this recall is WRK-22. This recall is an expansion of previous recall number 21V-955.

Recent 2021 Subaru Legacy complaints

Excerpts of the newest owner complaints, lightly cleaned of personal details. Complaints are unverified owner reports.

1. Filed Jun 4, 2026CTEngine

   Vehicle: 2021 Subaru Legacy Base 2.5i Mileage:~65,000 miles My engine suddenly began making loud internal knocking/tapping noises with no warning lights, no overheating, and no prior symptoms. The vehicle immediately became unsafe to operate. I had it towed to a Subaru dealership, where technicians confirmed the noise was coming from inside the engine and recommended a full engine replacement. The failure happened without any warning indicators, misfires, overheating, or oil…

   NHTSA complaint #11742064 · source
2. Filed Nov 21, 2025PATransmission & Drivetrain

   Car intermittently will studder and not go into first gear or go into second gear dangerously having car bog down and almost stall and then it violently downshifts having car RMP Hague go very high then slip and have no power to wheels and then a few seconds later go into second gear violently taking off again. Have tried taking issue to dealer but won’t even look unless check engine light comes on. Which it sometimes will for this issue and will shut back off before my…

   NHTSA complaint #11700919 · source
3. Filed Oct 27, 202560,000 miMIElectrical SystemEngine

   The contact owns a 2021 Subaru Legacy. The contact stated that while driving at various speeds during colder weather, the heater failed to operate as intended. Additionally, the Eyesight system was inoperable. The check engine and other unknown warning lights were displayed. In addition, the contact stated that the engine failed to warm up as intended after being started, and the engine temperature was 107°F, which was below the normal engine temperature of 200°F. The…

   NHTSA complaint #11695854 · source
4. Filed Jul 21, 2025PATransmission & Drivetrain

   CVT Transmission Failure. Failure occurred at approximately 66,706 miles on 5/16/25. The Check Engine and AT Temp lights appeared in the instrument cluster. The driving conditions when this happened were a safety concern. First, the vehicle would crawl, shutter, and almost stall with high RPMs when attempting to climb a hill. Second, on a level surface at any given time the vehicle would not respond then lunge forward unexpectedly. The vehicle was inspected by a Subaru…

   NHTSA complaint #11674975 · source
5. Filed Jul 7, 2025CAEngine

   Subaru has released a service bulletin regarding concerns with the Thermo Control Valve in specific vehicles. Unfortunately, individuals with vehicles bearing a rebuilt title, including myself, are required to cover expenses exceeding $2,000 out of their own pockets. Despite evidence indicating that the issue with the engine area is unrelated to the vehicle's rebuilt title, Subaru has chosen not to initiate a recall. This unequal treatment of titled vehicle owners is unjust,…

   NHTSA complaint #11671806 · source
6. Filed Feb 18, 2025VAAirbags

   The contact owns a 2021 Subaru Legacy. The contact received notification of NHTSA Campaign Number: 24V227000 (AIR BAGS); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.

   NHTSA complaint #11643453 · source
7. Filed Dec 28, 2024TXOther / Unknown

   Dear NHTSA Team, I am writing to report a recurring and distressing issue with my Subaru Legacy 2021 which I believe raises significant safety concerns. Since purchasing the vehicle, I have experienced consistent problems with the battery. Despite replacing the battery five times, the vehicle has repeatedly stopped functioning, including a recent incident where it stalled in the middle of the road. This required me to call law enforcement and a towing service, adding…

   NHTSA complaint #11632889 · source
8. Filed Nov 29, 2024CAAirbagsSeats & Seat Belts

   A Recall was issued Mar 22, 2024 for a dangerous safety issue. AN AIR BAG That Does NOT Deploy During A Crash CAN Increase THE Risk OF Injury. Remedy Dealers Will Replace THE ODS Sensors ON THE Front Passenger Seat, Free OF Charge. Interim Letters Informing Owners OF THE Safety Risk Were Mailed MAY 17, 2024. Owners Will Receive A Second Letter Once THE Remedy IS Available. Owners MAY Contact Subaru Customer Service AT 1-[phone removed]. Subaru's Number FOR This Recall IS…

   NHTSA complaint #11627940 · source

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Source: U.S. National Highway Traffic Safety Administration (NHTSA) Office of Defects Investigation public data, as of Oct 10, 2026. 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