Problems · by component

2008 Toyota Prius engine problems

49 owner complaints to NHTSA about the 2008 Toyota Prius cite engine, 3% of all 1,497 complaints for this model year.

Complaints
49
3% of all complaints
Crashes
3
Reported by owners
Fires
1
Reported by owners
Injuries
1
Reported by owners
01 —Owner reports

What owners say about the engine

Verbatim from NHTSA complaints, newest first
“Water pump failed after replacement in 2013 with 30k miles, car had only 93k miles when failed again in 2016. The potentiometer part failed, there is corrosion in the part. Was in freeway when it failed. I have reported this to different representatives. I was charged more 1.5k for a replacement of a faulty part that should last more than 50k miles.”
Owner complaint to NHTSAFiled May 12, 2026EngineODI 11737450
“My name is [XXX] ,i am filing this report on behalf of My daughter [XXX] the driver of the vehicle that involved with the unintended acceleration on the 2009 Toyota Prius .On a good clear morning on [XXX] . My daughter drove the 2009 Toyota Prius to work- when she enter to the parking lot at the speed round 5 mile/hour . Just when she was making a left turn on to the entrance gate with her left foot on the brake pedal . On a sudden the vehicle RPM unintended rev up too high and the vehicle had an unintended accelerating to move forward aggressively causing lose control of the steering . Also she could not brake even though her left foot was on the brake pedal and pressing hard to try to stop the vehicle . . This dangerous incident causing her Prius to bumped into the electrical gate panel control box . The accident caused some damages to her Prius and to the entrance gate control box though no body was hurt . But it got us through the terrible experience because it could kill some one for sure . My daughter been driving this commute car daily in the past 5 years and she has the skill of 20 year driving with good record . This Prius of her still have all OEM…”
Owner complaint to NHTSAFiled Jul 2, 2025Vehicle speed control, Service brakes, EngineCrash reportedODI 11670935
“About 3 years ago we started getting the red triangle of death with 2 amber lights on display the vsc and the round circle with the exclamation point in the center. This could happen in 500 miles or it could happen tomorrow. When this happens I loose all exceleration and air conditioning and a orange car emblem with an exclamation point in it on the display screen. Once safely off road press power button off and back on and everything is back to normal except red triangle and car on display screen car is then drivable again. Using a code reader to check codes no codes appear but still have red triangle. Leaving car set for a period of time and restarting car and red triangle is extinguished. Have to drive in right lane on freeway in case it wants to quit. The most recent time was last week had driven it about 80 miles with a stop about halfway for 1 hour and stopped for a movie came back got in car started it and within 1000 feet got the red triangle, was in left turning lane with red light, shut off and restarted and was able to drive again as in all other times, took it to a neighbor who had a code reader(about 9PM) and no codes found, he reset it and red…”
Owner complaint to NHTSAFiled Jul 23, 2024Electrical system, Engine, Fuel/propulsion systemODI 11604148
“Hello. My 2008 Toyota Prius had a malfunction with the "combination meter" which caused the vehicle dashboard to turn off completely, and we could not turn off the engine at times when stopped and parked. The dealer fixed the problem at a cost of $1580, and both the dealer and Toyota corporate through their brand engagement advocate acknowledged a long term problem with the combination meter. They had extended the warranty coverage for owners for this specific problem for about 10 years but not for owners like me with a vehicle 15 years old. I believe Toyota should cover and reimburse owners for this problem, which is potentially dangerous, no matter the age of the vehicle, especially for long term, loyal owners. There are many of these vehicles still on the road. Thank you. [XXX] [XXX] [XXX] .”
Owner complaint to NHTSAFiled Jan 21, 2024Electrical system, Exterior lighting, EngineODI 11566820
“While driving the 2008 Prius with approximately 107,219 miles for approximately 15 miles, all the RED LIGHTS appeared on the dashboard. The air condition stopped working with only hot air blowing. I immediately took the 2008 Prius to the Toyota dealer. This is the following repairs as follows: "A CEL ON, MULTIPLE WARNINGS: CS20 INVERTOR WATER PUMP - 7521 CT $300.98 Labor 1 04000 - 32528 HV ELECTRIC WATER PU $169.35 Part 1 00272 - SLLC2 SUPER LONG LIFE COOL $ 23.43 MISC. CHARGES $ 53.32 TOTAL CHARGES $547.08”
Owner complaint to NHTSAFiled Jun 26, 2021EngineODI 11422464
“THE COOLING PUMP FOR THE ELECTRICAL SYSTEM HAD CRACKED AND FLUID LEAKED OUT NO HEAT IN CAR AND RED TRIANGLE OF DEATH DISPLAY ON DASH LOCAL REPAIR SHOP INSTALLED NEW PUMP IT HAS BEEN REPLACED 2 TIMES. STILL LEAKS FROM HOUSING”
Owner complaint to NHTSAFiled Jan 11, 2021Engine, Fuel/propulsion systemODI 11387626

Showing 6 of 49 reports. Read every report on NHTSA.gov.

Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 4, 2026NHTSA vehicle page

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.