NHTSA Recall 21V734000: Software (engine and engine cooling) and hybrid propulsion system
Toyota Motor Engineering & Manufacturing reported this safety recall to NHTSA on , covering an estimated 8,411 vehicles. It affects 2 models including the Toyota Prius.
| NHTSA campaign | 21V734000 |
|---|---|
| Manufacturer campaign | 21TB07 / 21TA07 |
| Components | ENGINE AND ENGINE COOLING › ENGINE › ENGINE CONTROL MODULE (ECU/ECM) › SOFTWARE; HYBRID PROPULSION SYSTEM |
| Report received | September 22, 2021 |
| Owner notification | November 18, 2021 |
| Initiated by | Manufacturer |
Defect
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2022 Prius and Prius Prime vehicles. The Engine Control Unit (ECU) software may falsely detect an error and shut down the hybrid system, causing a loss of drive power.
Safety risk
A loss of drive power increases the risk of a crash.
Remedy
Dealers will update the ECU software, free of charge. Owner notification letters were mailed November 18, 2021. Owners may contact Toyota customer service at 1-800-331-4331. Toyota's number for this recall is 21TB07/21TA07.
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.
Vehicles covered by recall 21V734000
Being listed here means the campaign covers the model year, not that every car was built with the defect or is still unrepaired. Enter your VIN above to check your specific vehicle. Recall repairs are free at authorised dealers. Source: NHTSA, October 2026.