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EnginePart report

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 miles

Related service bulletins

Engine: other model years

YearComplaintsShare of year
202228%
2021233%
202017%
2019620%
201838%
20171213%
20161711%
201585%
2014178%
2013379%
2012317%
2011479%
20101405%
2009194%
2008493%
2007372%
2006252%
2005151%
200491%
200121%

Other parts of the 2012 Toyota Prius

Brakes
200 complaints
Electrical system
52 complaints
Exterior lighting
36 complaints
Other or unknown
33 complaints
Visibility (wipers, defrost, mirrors)
30 complaints
Air bags
28 complaints
Body and structure
23 complaints
Transmission and drivetrain
21 complaints
Steering
13 complaints
Vehicle speed control
13 complaints
Fuel system
11 complaints
Seat 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