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Problems to check

2021 Toyota Prius reported problems

These problems appeared in the records we reviewed. This is not a list of what happens most often, and it does not predict the condition of one car.

What to look for

Pedestrian Alert Sounds investigation

Moderate severity
Evidence: High confidence

Official record covers model years 2017 through 2022.

Symptom
Pedestrian alert sounds NHTSA received a petition on or about July 18, 2022, requesting that Federal Motor Vehicle Safety Standard (FMVSS) 141 be applied to all electric and hybrid vehicles operating in the United States.
Why it matters
The records describe a problem worth checking before purchase.

What to inspect

  • Ask the inspector to test the named system and record the result.

Ask the inspector to check: Independent pre-purchase inspection.

What may help

  • Use the official record to focus the inspection and service-history review.
Sources and limitsShow
Source recordEvidence: High confidence

The records describe a problem worth checking before purchase.

“Pedestrian alert sounds NHTSA received a petition on or about July 18, 2022, requesting that Federal Motor Vehicle Safety Standard (FMVSS) 141 be applied to all electric and hybrid vehicles operating in the United States. The petition can be reviewed at NHTSA.gov under ODI Number 11486072. FMVSS 141 establishes performance requirements for pedestrian alert sounds for motor vehicles. The standard applies to hybrid and electric vehicles that have a gross vehicle weight rating of 4,536 KG or less or are defined as low-speed vehicles. The standard became fully applicable to all such vehicles manufactured on or after March 1, 2021.On January 27, 2023, NHTSA opened Defect Petition (DP) 22-005 to evaluate the subject matter described in the petition. On June 24, 2023 and as supplemented on June 25, 2023, the petitioner notified NHTSA he was withdrawing his petition. The petitioner indicated that, based on his review of data, there is no justification for asserting potential benefits that could be derived from actions sought by my petition. Based on the petitioner's withdrawal, DP22-005 is closed. Closure of this DP does not represent a determination by NHTSA regarding the subject matter of the petition.”
NHTSAinvestigationJan 2023Open source record

Manufacturer service campaign

Moderate severity
Evidence: High confidence

Official record covers model years 2017 through 2021.

Symptom
Toyota Safety Recall and Service Campaign - Technician Certification Requirements
Why it matters
The records describe a problem worth checking before purchase.

Mileage in the reports

In reports that included mileage, this problem showed up around 13,335 to 86,393 miles.

Based on 15 reports that included mileage. This is not a failure rate or a prediction.

What to inspect

  • Ask the inspector to test the named system and record the result.

Ask the inspector to check: Independent pre-purchase inspection.

What may help

  • Use the official record to focus the inspection and service-history review.
Sources and limitsShow
Source recordEvidence: High confidence

The records describe a problem worth checking before purchase.

“Toyota Safety Recall and Service Campaign - Technician Certification Requirements”
NHTSAtsbMar 2021Open source record
Source recordEvidence: High confidence

The records describe a problem worth checking before purchase.

“Toyota Safety Recall and Service Campaign - Technician Certification Requirements”
NHTSAtsbMar 2021Open source record
Source recordEvidence: High confidence

The records describe a problem worth checking before purchase.

“Toyota Safety Recall and Service Campaign - Technician Certification Requirements”
NHTSAtsbMar 2021Open source record

Manufacturer service campaign

Moderate severity
Evidence: High confidence

Official record covers model years 2017 through 2022.

Symptom
The air conditioning dye injection tool kit has been developed to aid in identifying the location of air conditioning refrigerant leaks.
Why it matters
The records describe a problem worth checking before purchase.

Mileage in the reports

In reports that included mileage, this problem showed up around 11,375 to 81,828 miles.

Based on 22 reports that included mileage. This is not a failure rate or a prediction.

What to inspect

  • Ask the inspector to test the named system and record the result.

Ask the inspector to check: Independent pre-purchase inspection.

What may help

  • Use the official record to focus the inspection and service-history review.
Sources and limitsShow
Source recordEvidence: High confidence

The records describe a problem worth checking before purchase.

“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 leaks.”
NHTSAtsbJun 2025Open source record
Source recordEvidence: High confidence

The records describe a problem worth checking before purchase.

“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 leaks.”
NHTSAtsbJun 2025Open source record
Source recordEvidence: High confidence

The records describe a problem worth checking before purchase.

“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 leaks.”
NHTSAtsbJun 2025Open source record

The records cannot show the service history, repairs, title, accidents, or condition of the car you found.

Check a 2021 Toyota Prius at its mileage