# NHTSA recall 21V734000

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: 21V734000
- Manufacturer's number: 21TB07 / 21TA07
- Manufacturer: Toyota Motor Engineering \& Manufacturing
- Reported: 2021\-09\-22
- Owners notified: 2021\-11\-18
- Component: HYBRID PROPULSION SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE
- Units potentially affected: 8411
- Part numbers: 89981\-47U40, 89981\-47U30, 89981\-47S90, 89981\-47U50

## What is wrong

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.


## What can happen

A loss of drive power increases the risk of a crash.


## The 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.


## Remedy progress the manufacturer reported

- Report: Annual report 2, for 2024 quarter 4 to 2025 quarter 3
- Filed with NHTSA: 2025\-10\-15
- Vehicles in the campaign: 8411
- Reported remedied: 8241 \(97%\)
- Reported unreachable: 82
- Reported removed: 9

These are the manufacturer's totals for the whole campaign at the end of 2025 quarter 3, 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.

## Vehicles this campaign lists

- [2022 TOYOTA PRIUS](/makes/toyota/prius/2022/recalls.md)
- [2022 TOYOTA PRIUS PRIME](/makes/toyota/prius/2022/recalls.md). Listed as a series or trim of this model.

## Check a VIN

- [NHTSA recall lookup by VIN, United States](https://www.nhtsa.gov/recalls)
- [Transport Canada recall search, Canada](https://wwwapps.tc.gc.ca/Saf-Sec-Sur/7/VRDB-BDRV/search-recherche/menu.aspx?lang=eng)

JSON: [/v1/recalls/nhtsa/21V734000](/v1/recalls/nhtsa/21V734000)

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