NHTSA recall 21V955000
A recall listed here may apply to a vehicle of this year, make and model. Only the manufacturer can say whether it applies to one vehicle: check the VIN with the official lookups.
| Published by | NHTSA (United States) |
|---|---|
| Campaign number | 21V955000 |
| Manufacturer's number | WRK-21 |
| Manufacturer | Subaru of America, Inc. |
| Reported | 2021-12-09 |
| Owners notified | 2022-08-19 |
| Component | POWER TRAIN:DRIVELINE:CHAIN/BELT; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM) |
| Units potentially affected | 198255 |
| Part numbers | 30919AH14D, 30919AH14C, 30919AH14B, 30919AH14A, 30919AH13C, 30919AH13B, 30919AH13A, 30919AG76B, 30919AG76A, 30919AG75B, 30919AG75A, 30919AF99C, 30919AF99B, 30919AF99A, 30919AF98C, 30919AF98B, 30919AF98A |
| Report | Annual report 2, for 2025 quarter 3 to 2026 quarter 2 |
|---|---|
| Filed with NHTSA | 2026-07-23 |
| Vehicles in the campaign | 198255 |
| Reported remedied | 190703 (96%) |
| Reported unreachable | 100 |
| Reported removed | 801 |
These are the manufacturer's totals for the whole campaign at the end of 2026 quarter 2, as filed with NHTSA. They do not say whether one vehicle has been remedied: check the VIN with the official lookups. The reports are from data as of 2026-10-19.
What is wrong
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.
What can happen
An improperly secured drive chain may slip and break, causing a loss of drive power and increasing the risk of a crash.
The 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.
Notes
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.
| 2019 SUBARU ASCENT | Built 2018-02-22 to 2020-07-20. |
|---|---|
| 2020 SUBARU ASCENT | Built 2018-02-22 to 2020-07-20. |
| 2020 SUBARU LEGACY | Built 2019-07-15 to 2020-08-13. |
| 2020 SUBARU OUTBACK | Built 2019-07-15 to 2020-08-13. |
A vehicle with no link is not in this site's catalog, which covers cars, multipurpose vehicles and trucks by model year. The campaign is from data as of 2026-10-19.
Bulletins for the same vehicles and component
| 16-140-23 | 2023-10-03. Service bulletin. This bulletin announces availability of new reprograming files for the Transmission Control Module (TCM) to address judder a sensation possibly accompanied by a vibration-type sound when accelerating from slow speeds. |
|---|---|
| 16-141-23R | 2023-08-02. Service bulletin. This bulletin announces availability of reprogramming files to optimize the Transmission Control Module (TCM). The new files were designed to address cases of DTC P0711 (Transmission Fluid Temperature Sensor “A” Circuit Range/Performance) being detected by the TCM during low ambient temperatures (32° F(0° C)). |
| 16-136-22R | 2023-07-03. Service bulletin. This service bulletin provides a temporary repair procedure to address vibrations and/or judder concerns experienced on turns during acceleration. |
| 16-140-23 | 2023-05-02. Service bulletin. This bulletin announces availability of new reprograming files for the Transmission Control Module (TCM) to address judder a sensation possibly accompanied by a vibration-type sound when accelerating from slow speeds. |
| 16-125-19 | 2022-03-04. Service bulletin. This bulletin outlines design changes made to the TR580 CVT oil pan assembly. |
| 16-132-20R | 2022-02-04. Service bulletin. This bulletin provides updated diagnostic procedures to follow and a brief questionnaire to complete when diagnosing an alleged Chain Slip condition on the TR580 and TR690 model CVT transmissions. |
A bulletin is the manufacturer's note to its dealers. It is not part of this recall.