The problem
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.
The risk
A loss of drive power increases the risk of a crash.
The fix
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.
Recall details
| NHTSA campaign | 21V-734 (21V734000) |
|---|---|
| Manufacturer number | 21TB07 / 21TA07 |
| Manufacturer | Toyota Motor Corporation |
| Component | Engine and engine cooling › Engine › Engine control module (ECU/ECM) › Software |
| Report date | September 22, 2021 |
| Owners notified | November 18, 2021 |
| Vehicles affected | 8,411 |
| Initiated by | Manufacturer |
Vehicles covered
Owner complaints about the engine & cooling
Frequently asked questions
Is the recall 21V-734 repair free?
Yes. Toyota dealers will fix the problem at no cost: 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.
How do I know if my car is included?
Not every vehicle of the listed model years is affected — the recall covers 8,411 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.