Safety Recall NHTSA · 21V734000 Reported September 22, 2021

Ecu software may cause loss of drive power

Toyota Motor Engineering & Manufacturing · Engine And Engine Cooling · 8,411 vehicles potentially affected

NHTSA ID
21V734000
Manufacturer Campaign
21TB07 / 21TA07
Manufacturer
Toyota Motor Engineering & Manufacturing
Component
Engine And Engine Cooling
Vehicles Affected
8,411
Recall Type
Vehicle
Report Received
September 22, 2021
Completion Rate
98.08

Defect Summary

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 Consequence

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

Corrective Action

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.

What you should do

  1. Look up your VIN at nhtsa.gov/recalls to confirm this recall applies to your vehicle.
  2. Contact an authorized Toyota Motor Engineering & Manufacturing dealer and reference recall ID 21V734000 or campaign 21TB07 / 21TA07.
  3. Schedule the free repair. By federal law, the manufacturer must remedy the defect at no cost.
View Official NHTSA Notice →
Related

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FAQ: Recall 21V734000

Your rights, the repair process, and what each field on this page means.

What is recall 21V734000?

NHTSA recall 21V734000 was issued by Toyota Motor Engineering & Manufacturing on September 22, 2021. It addresses: Ecu software may cause loss of drive power. The recall affects approximately 8,411 vehicles, with the defect involving the Engine And Engine Cooling component.

How do I get this recall repaired?

Contact any authorized Toyota Motor Engineering & Manufacturing dealer and reference NHTSA recall ID 21V734000 or the manufacturer campaign number 21TB07 / 21TA07. Under federal law, the repair is completely free regardless of vehicle age or owner history.

Is my vehicle included in this recall?

The only way to confirm is to look up your 17-character VIN at nhtsa.gov/recalls. NHTSA's tool will tell you if VIN-by-VIN this exact recall applies.

How long do I have to get a recall repair done?

There is no expiration on most federal safety recalls. Even if your vehicle is years old and you bought it used, the manufacturer is required to perform the repair at no cost.

Where does the data on this page come from?

All information on this page is sourced directly from the U.S. Department of Transportation public dataset for NHTSA recalls. Last refreshed: 2026-05-22. For the most current official notice, visit nhtsa.gov/recalls.