2021 Toyota Prius Other or unknown Problems
- Complaints
- 1about this part
- Share
- 17%of 6 total for the year
- Median mileage
- 5,200miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the other or unknown of the 2021 Toyota Prius, 17% of the 6 complaints for this model year. Where a mileage was given, the median is 5,200 miles.
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.
“Carbon monoxide seeps into the passenger car but diller cannot find it and did not have tools to detect co level in the car. I can't use this car because was poisoned many times and after a second check-up, the level of co becomes higher so I can't drive the car without poisoning. Please help me. I am worrying to sell my car because other driver will get injury. This is the new car only 7000 miles.”
NHTSA complaint #11416154, filed 2021-05, 5,200 milesRelated service bulletins
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Other or unknown: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2025 | 3 | 19% |
| 2024 | 9 | 33% |
| 2023 | 3 | 14% |
| 2022 | 5 | 21% |
| 2021 | 1 | 17% |
| 2020 | 5 | 36% |
| 2019 | 8 | 27% |
| 2018 | 6 | 16% |
| 2017 | 11 | 12% |
| 2016 | 31 | 20% |
| 2015 | 15 | 9% |
| 2014 | 27 | 13% |
| 2013 | 51 | 12% |
| 2012 | 33 | 8% |
| 2011 | 30 | 6% |
| 2010 | 148 | 5% |
| 2009 | 36 | 7% |
| 2008 | 92 | 6% |
| 2007 | 105 | 5% |
| 2006 | 44 | 3% |
| 2005 | 56 | 5% |
| 2004 | 18 | 3% |
| 2003 | 3 | 3% |
| 2002 | 5 | 3% |
| 2001 | 6 | 4% |
Other parts of the 2021 Toyota Prius
2 complaintsFuel system
2 complaintsBrakes
1 complaintsElectrical system
1 complaintsForward collision avoidance
1 complaintsLane departure
1 complaintsVehicle speed control
1 complaintsWheels
1 complaints
← All problems reported for the 2021 Toyota Prius
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