2021 Toyota Prius Engine Problems
- Complaints
- 2about this part
- Share
- 33%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 2 complaints about the engine of the 2021 Toyota Prius, 33% of the 6 complaints for this model year. Where a mileage was given, the median is 5,200 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.
“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 miles“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.”
NHTSA complaint #11526893, filed 2023-06Related service bulletins
- 11037202Aug 20, 2026OBSOLETE NOTICE August 20, 2026: This bulletin is now obsolete. Please see T-SB-0051-26.
- 11037201Aug 20, 2026This bulletin includes basic procedures for performing a rescue charge at battery on high voltage (HV) Ni-MH and Li-ion batteries.
- 11020664Jun 17, 2025Some 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.
- 11020658Jun 13, 2025Some 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.
- 11012753Dec 10, 2024This bulletin includes basic procedures for performing a rescue charge at battery on high voltage (HV) Ni-MH and Li-ion batteries. This bulletin should be used in conjunction…
- 11003636Apr 17, 2024Some 2020 – 2024 Corolla HV, 2017 – 2022 Prius Prime, and 2016 – 2022 Prius vehicles equipped with a 2ZR-FXE engine may exhibit a MIL ON condition with Diagnostic Trouble Code…
- 11003581Apr 17, 2024Some 2020 – 2024 Corolla HV, 2017 – 2022 Prius Prime, and 2016 – 2022 Prius vehicles equipped with a 2ZR-FXE engine may exhibit a MIL ON condition with Diagnostic Trouble Code…
- 11003602Apr 1, 2024Some 2020 – 2024 Corolla HV, 2017 – 2022 Prius Prime, and 2016 – 2022 Prius vehicles equipped with a 2ZR-FXE engine may exhibit a MIL ON condition with Diagnostic Trouble Code…
- 11003547Apr 1, 2024Some 2020 – 2024 Corolla HV, 2017 – 2022 Prius Prime, and 2016 – 2022 Prius vehicles equipped with a 2ZR-FXE engine may exhibit a MIL ON condition with Diagnostic Trouble Code…
Engine: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2022 | 2 | 8% |
| 2021 | 2 | 33% |
| 2020 | 1 | 7% |
| 2019 | 6 | 20% |
| 2018 | 3 | 8% |
| 2017 | 12 | 13% |
| 2016 | 17 | 11% |
| 2015 | 8 | 5% |
| 2014 | 17 | 8% |
| 2013 | 37 | 9% |
| 2012 | 31 | 7% |
| 2011 | 47 | 9% |
| 2010 | 140 | 5% |
| 2009 | 19 | 4% |
| 2008 | 49 | 3% |
| 2007 | 37 | 2% |
| 2006 | 25 | 2% |
| 2005 | 15 | 1% |
| 2004 | 9 | 1% |
| 2001 | 2 | 1% |
Other parts of the 2021 Toyota Prius
2 complaintsBrakes
1 complaintsElectrical system
1 complaintsForward collision avoidance
1 complaintsLane departure
1 complaintsOther or unknown
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 27, 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