2005 Toyota Prius Engine cooling Problems
- Complaints
- 64about this part
- Share
- 6%of 1,051 total for the year
- Median mileage
- 18,880miles
- Trend
- StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.
NHTSA recorded 64 complaints about the engine cooling of the 2005 Toyota Prius, 6% of the 1,051 complaints for this model year. Where a mileage was given, the median is 18,880 miles. 2 of these say a crash was involved and 1 a fire, according to the filers.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Purchased 2005 Toyota Prius - VIN # jtd kb2 ou1 530 793 29 on july 20, 2005 -registered it to my wife krista gottlieb. On july 22, 2005 when this car had about 80 miles on it, I was driving it on the highway in traffic at about 50 MPH - when suddenly I lost complete power. By that, I mean that the accelerator pedal was completely unresponsive. …”
NHTSA complaint #10140213, filed 2005-10, 80 miles“On my 2005 Toyota Prius, the engine suddenly stalled when leaving the dealership in fresno, california. The electric engine continued for a short time to get back to the dealer, then everything was dead. After working on it for several hours the dealer could not find the source of the problem, but did get it operating again and I continued the trip with incident.”
NHTSA complaint #10123853, filed 2005-06, 5,321 miles“I was driving on highway at 70 MPH and vehicle stalled. I coasted over to road shoulder, turned off vehicle power and restarted vehicle without issue. Called Toyota dealer and was told my VIN was not part of the software recall for software problem for stalling engines. This could have caused a serious problem if I was not in the right lane and able to move to shoulder, clearing traffic immediately.”
NHTSA complaint #10143783, filed 2005-11, 12,176 miles“Reported incident to Toyota customer support -- incident: 050412-000111 responses received from Toyota was that the computer was fixed based on a technical service bulletin. No recurrence since the fix. To: Toyota customer support sir or madam: I bought my 2005 Prius new from mechanicsville Toyota on december 1, 2004 and generally was quite satisfied with the car and the great gas mileage it provides. …”
NHTSA complaint #10124529, filed 2005-06, 4,738 miles“I took my Toyota Prius in for the recall noted in pe05029 and since have lost 8 miles per gallon in performance. I contacted Toyota customer service to let them know and asked if they could tell me if other customers were experiencing the same problem. The reply was that customer service information is proprietary and that they would record my complaint but could give me no further information. I am not sure the car would still meet the epa mileage rating originally given.”
NHTSA complaint #10147159, filed 2006-01, 24,000 milesRelated service bulletins
- 10253223Mar 4, 2024This is to advise of various price adjustments that will affect Toyota Genuine Motor Oil and Long Life Coolant, effective March 1, 2024. These products are ordered through the…
- 10179698Aug 5, 2020TSB: Some 2003 ? 2020 model year Prius, Prius C, Prius V; 2006 ? 2019 model year Highlander Hybrid Vehicle; 2007 ? 2020 Camry Hybrid Vehicle; 2013 ? 2020 model year Avalon Hybrid…
- 10179602Aug 5, 2020TSB: Some 2003 ? 2020 model year Prius, Prius C, Prius V; 2006 ? 2019 model year Highlander Hybrid Vehicle; 2007 ? 2020 Camry Hybrid Vehicle; 2013 ? 2020 model year Avalon Hybrid…
- 10132091Oct 8, 2013Some 2004 ? 2009 model year Prius vehicles may exhibit a MIL ?ON? condition with Diagnostic Trouble Code (DTC) P0A80 or P0A7F stored due to dust or debris build-up in the HV…
- 10132204Aug 12, 2013For vehicles that are used under certain severe operating conditions, the HV Battery Cooling Fan may experience an excessive buildup of dust, lint, or other debris that can…
- 10042966Dec 1, 2011Toyota: see document search button for owner letter. Information regarding water pump replacement, on some electric hybrid vehicles, which causes slowness of the pump actuation.
- 10034284Feb 4, 2010Toyota: techstream ecu flash reprogramming procedure. Flash reprogramming allows the ecu software to be updated without replacing the ecu. Flash calibration updates for specific…
- 10025867Jun 6, 2008Toyota: engine control: some customers may report a m.I.l. On condition that occurs after operating the vehicle for extended times in ready on mode with the transaxle in the park…
- 10021710Jul 7, 2006Malfunction indicator lamp on with dtc p0aa6 or p3009, information codes 526 and 613.
- 10018851Dec 16, 2005M.I.l. On dtc p0300, p0301, p0302, p0303, or p0304.
Engine cooling: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2022 | 1 | 4% |
| 2019 | 1 | 3% |
| 2018 | 3 | 8% |
| 2017 | 1 | 1% |
| 2016 | 1 | 1% |
| 2012 | 1 | 0% |
| 2011 | 5 | 1% |
| 2010 | 33 | 1% |
| 2009 | 7 | 1% |
| 2008 | 16 | 1% |
| 2007 | 17 | 1% |
| 2006 | 20 | 1% |
| 2005 | 64 | 6% |
| 2004 | 89 | 15% |
| 2003 | 11 | 11% |
| 2002 | 11 | 7% |
| 2001 | 18 | 11% |
Other parts of the 2005 Toyota Prius
346 complaintsBrakes
282 complaintsElectrical system
178 complaintsVehicle speed control
109 complaintsOther or unknown
56 complaintsAir bags
44 complaintsTransmission and drivetrain
41 complaintsSteering
39 complaintsFuel system
28 complaintsElectronic stability control
20 complaintsEngine
15 complaintsVisibility (wipers, defrost, mirrors)
15 complaints
← All problems reported for the 2005 Toyota Prius
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 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