How many complaints have been filed for the 2021 Toyota Prius?

11 consumer complaints have been filed with NHTSA for the 2021 Toyota Prius.

Are there technical service bulletins (TSBs) for the 2021 Toyota Prius?

There are 116 technical service bulletins (TSBs) on file with NHTSA for the 2021 Toyota Prius.

2021 Toyota Prius Service and Repair Manual

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Factory-Grade Data

2021 Toyota Prius service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.

Designed for technicians and DIY owners, this manual helps you diagnose issues correctly, follow proven repair steps, and use wiring diagrams and system sections to track faults faster.

What’s included

Step-by-step repair procedures and service information
Specifications, torque values, and reference data
Electrical diagnostics with full wiring diagrams
Coverage across major systems: engine, transmission/driveline, brakes, steering, suspension, HVAC, and more
Diagnostic trouble codes and troubleshooting flow
Maintenance schedules and fluid capacities

Trims covered

2020 Edition
L Eco
LE
LE AWD-e
Limited
XLE
XLE AWD-e

Index / Table of contents

Body
Brakes
Chassis Electrical
Driveline
Engine Cooling
Engine Electrical
Engine Mechanical
Engine Performance & Emission Controls
Fuel System
General Information & Identification
Heating, Ventilation, & Air Conditioning
Maintenance & Lubrication
Specifications
Steering
Suspension
Transmission, Clutch, & Transfer Case
Diagnostic Trouble Codes
Technical Service Bulletins
Wiring Diagrams

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Vehicle Safety Data

2021 Toyota Prius Recalls & Complaints

No active recalls The 2021 Toyota Prius has no recalls on file with NHTSA.

TSB #11028726

OBSOLETE NOTICE January 30, 2026: This bulletin is now obsolete. Please see T-SB-0001-26.

TSB #11028722

Some 2018 2024 model year Toyota vehicles equipped with a Premium Audio with Dynamic Navigation System require a Special Service Tool (SST) USB flash drive to update the map, points of interest, and system software.

TSB #11028712

Some 2005 2026 Toyota vehicles that have undergone water intrusion may exhibit a condition in which a musty odor is present. Follow the procedures in this bulletin to remediate the odor and address this condition. The purpose of this Servic

TSB #11020664

Some ECUs can set a DTC that is common with other ECUs. This can lead to accidental use of the wrong repair manual when diagnosing these type of DTCs.

TSB #11020658

Some ECUs can set a DTC that is common with other ECUs. This can lead to accidental use of the wrong repair manual when diagnosing these type of DTCs.

TSB #11020657

The air conditioning dye injection tool kit has been developed to aid in identifying the location of air conditioning refrigerant leaks. The procedures outlined in this Service Bulletin aid in locating, inspecting, and repairing refrigerant

TSB #11019332

To assist with the early detection and early resolution of audio related concerns you may be asked to recover MMR data from the head unit. The following steps are instructions on how to retrieve the data from the system and are only to be u

TSB #11018329

Showing the 8 most recent of 116 technical service bulletins on file with NHTSA.

20230613Component: SERVICE BRAKESCrash reported

The car accelerated without my foot on the accelerator, brake did not respond, and I had to drive through grass and a rock-filled ditch until after about 10 seconds the car returned to my control.

20230613Component: ENGINECrash reported

The car accelerated without my foot on the accelerator, brake did not respond, and I had to drive through grass and a rock-filled ditch until after about 10 seconds the car returned to my control.

20230613Component: ELECTRICAL SYSTEMCrash reported

The car accelerated without my foot on the accelerator, brake did not respond, and I had to drive through grass and a rock-filled ditch until after about 10 seconds the car returned to my control.

20260223Component: FUEL/PROPULSION SYSTEM

When i am going down it's charging when the charge reaches 6 from 8 the engine starts working and stop changing at that point and the power continues comes from engine only without the hybrid battery

20240918Component: VEHICLE SPEED CONTROL

The contact owns a 2021 Toyota Prius. The contact stated while driving approximately 35 - 45 MPH, the vehicle independently accelerated. The brake pedal was depressed but failed to stop the vehicle im

Showing the 5 most serious of 11 complaints filed with NHTSA.

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