2012 Toyota Prius Engine Problems
- Complaints
- 31about this part
- Share
- 7%of 424 total for the year
- Median mileage
- 77,000miles
- Trend
- StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.
NHTSA recorded 31 complaints about the engine of the 2012 Toyota Prius, 7% of the 424 complaints for this model year. Where a mileage was given, the median is 77,000 miles. 1 a fire, according to the filers.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“My Prius is using 1 quart of oil per 900 miles, the Toyota dealership did a oil study and verified that indeed the car is using 1 quart per 900 miles, but will not do anything about it and stated my car is no longer under warranty and could be rebuilt for 9000 dollars-this is a commuter car only and has only been used for open road driving.”
NHTSA complaint #10981124, filed 2017-04, 60,000 miles“Bought this car brand new in 2012 and have always performed maintenance on time. Between the last oil change and this oil change the Prius is burning oil and I am having to add at least two quarts of oil before it is back on the dipstick. I am noticing this is a problem with the 2010-2014 Prius and that Toyota has done nothing to solve it. I do not want to be on a long trip and burn through oil and lock my engine up causing harm to myself or others.”
NHTSA complaint #11244721, filed 2019-08, 133,883 miles“I went to the charles maund Toyota dealer at austin, tx for a recall. Nhtsa recall id 18v684. According to the official recall remedy from NHTSA, if the vehicle has experienced an inverter failure with certain hybrid system faults related to this condition, the inverter assembly will be repaired or replaced free of charge. My car lost power on the highways several times recently. The error code is p0a08, which is related to inverter failure with certain hybrid system faults, so the inverter assembly should be repaired or replaced free of charge. …”
NHTSA complaint #11172950, filed 2019-01, 203,079 miles“After Toyota power management software recall installed power management upgrade software in my car I immediately experienced serious problems with my ignition /start of hybrid/gasoline engine. After pressing ignition, I had to wait 15 to 20 minutes and press start button on/off repeatedly until the gasoline engine ignite but hybrid failed to start. It is not normal because a Prius hybrid engine starts first not the gasoline engine. Toyota has disabled some important functions in its power management recall software update that affects the hybrid engine performance and failure to start. …”
NHTSA complaint #10875560, filed 2016-06, 14,000 miles“Driving the interstate at 65 MPH the engine stopped - with no warning of any kind, the air, dash lights, radio, etc all continued to work. We coasted to the side of the road & restarted the engine. We purchased new & had all the required maintenance done at the Toyota dealership. We learned of a recall on the news in february & took the car in for the repair. (a software problem related to the car engine stopping while driving) when we learned of the recall we remembered this had happened to us about a month earlier, again, on the interstate at 65 MPH & thought it was just a fluke at the time. …”
NHTSA complaint #10584747, filed 2014-04, 31,000 milesRelated service bulletins
- 11029893Feb 13, 2026This bulletin includes basic procedures for performing a rescue charge on Ni-MH high voltage (HV) batteries. This bulletin should be used in conjunction with the applicable model…
- 11029892Feb 13, 2026OBSOLETE NOTICE February 13, 2026: This bulletin is now obsolete. Please see T-SB-0009-26.
- 10179763Aug 11, 2020TSB: OBSOLETE NOTICE August 11, 2020: This bulletin is no longer applicable and is now obsolete.
- 10179761Aug 11, 2020TSB: OBSOLETE NOTICE August 11, 2020: This bulletin is no longer applicable and is now obsolete.
- 10179759Aug 11, 2020TSB: OBSOLETE NOTICE August 11, 2020: This bulletin is no longer applicable and is now obsolete.
- 10179719Aug 11, 2020TSB: OBSOLETE NOTICE August 11, 2020: This bulletin is no longer applicable and is now obsolete.
- 10179717Aug 11, 2020TSB: OBSOLETE NOTICE August 11, 2020: This bulletin is no longer applicable and is now obsolete.
- 10179715Aug 11, 2020TSB: OBSOLETE NOTICE August 11, 2020: This bulletin is no longer applicable and is now obsolete.
- 10178786Jul 17, 2020TSB: Some 2010 - 2015 model year Prius and 2012 - 2017 model year Prius V vehicles may exhibit a MIL ON condition with Diagnostic Trouble Codes (DTCs) P0A94, P324E, P0A1A, and/or…
- 10164926Aug 30, 2019Warranty Enhancement Program: Toyota has received reports of a rough idle and/or rattle noise from the transaxle at cold start due to a sticking Exhaust Gas Recirculation (EGR)…
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 2012 Toyota Prius
200 complaintsElectrical system
52 complaintsExterior lighting
36 complaintsOther or unknown
33 complaintsVisibility (wipers, defrost, mirrors)
30 complaintsAir bags
28 complaintsBody and structure
23 complaintsTransmission and drivetrain
21 complaintsSteering
13 complaintsVehicle speed control
13 complaintsFuel system
11 complaintsSeat belts
11 complaints
← All problems reported for the 2012 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