The problem
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.
The risk
An improperly secured drive chain may slip and break, causing a loss of drive power and increasing the risk of a crash.
The fix
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.
Recall details
| NHTSA campaign | 21V-955 (21V955000) |
|---|---|
| Manufacturer number | WRK-21 |
| Manufacturer | Subaru of America, Inc. |
| Component | Power train › Driveline › Chain/belt |
| Report date | December 9, 2021 |
| Owners notified | August 19, 2022 |
| Vehicles affected | 198,255 |
| Initiated by | Manufacturer |
Vehicles covered
Owner complaints about the transmission & drivetrain
Frequently asked questions
Is the recall 21V-955 repair free?
Yes. Subaru dealers will fix the problem at no cost: 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.
How do I know if my car is included?
Not every vehicle of the listed model years is affected — the recall covers 198,255 vehicles built in a certain window. Check your 17-character VIN with our VIN recall check or at nhtsa.gov/recalls.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.