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Electrical systemPart report

2021 Toyota Prius Prime Electrical system Problems

Complaints
4about this part
Share
40%of 10 total for the year
Median mileage
177,000miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 4 complaints about the electrical system of the 2021 Toyota Prius Prime, 40% of the 10 complaints for this model year. Where a mileage was given, the median is 177,000 miles. 1 of these say a crash was involved, according to the filers.

Fewer than 15 complaints name this part, so treat the figures as a rough indication only.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“Odometer Fraud. The contact purchased a 2021 Toyota Prius Prime. The contact discovered that there was a mileage discrepancy after the purchase. The vehicle was a private sale. At the time of the purchase, the vehicle mileage was 73,000. It was later discovered upon checking the vehicle history report with a Local dealer, the contact was informed that the mileage was 274,000.”

NHTSA complaint #11723068, filed 2026-03, 274,000 miles

“I was slowly entering a handicapped parking place right in front of a business. The distance from the front of the parking space to the building wall was about 15 feet, one car length. I approached the place to stop in the parking spot when in a split second the car violently surged forward and would have crashed into the cinderblock wall had there not been a supporting post on the building and a metal frame with equipment which stopped the forward movement. The surge was explosive, almost like the acceleration of an airplane taking off. The whole incident took a second or two. …”

NHTSA complaint #11696251, filed 2025-10

“The contact owns a 2021 Toyota Prius Prime. The contact stated that after the vehicle was shifted into park, the key was removed and the contact stepped away from the vehicle, when the vehicle inadvertently started to roll away. As a result, the vehicle rolled into the neighbor’s driveway and grazed another vehicle then stopped. Additionally, the contact stated that while the vehicle was on the charger port, the vehicle failed to start. The dealer was notified of the failure and the contact was advised to take the vehicle in to be diagnosed. The vehicle was not diagnosed or repaired. …”

NHTSA complaint #11545583, filed 2023-09, 80,000 miles

Related service bulletins

Electrical system: other model years

YearComplaintsShare of year
2024640%
2023350%
2022113%
2021440%
2020319%
2019222%
201816%
2017717%

Other parts of the 2021 Toyota Prius Prime

Brakes
3 complaintsFuel system
2 complaintsTransmission and drivetrain
2 complaintsAir bags
1 complaintsBack-over prevention (rear camera)
1 complaintsEngine
1 complaintsForward collision avoidance
1 complaintsOther or unknown
1 complaintsVehicle speed control
1 complaintsVisibility (wipers, defrost, mirrors)
1 complaints

← All problems reported for the 2021 Toyota Prius Prime

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology