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Engine coolingPart report

2006 Toyota Prius Engine cooling Problems

Complaints
20about this part
Share
1%of 1,439 total for the year
Median mileage
46,100miles
Trend
FallingComplaints filed in the last 3 full calendar years are at least 25% lower than in the 3 years before.

NHTSA recorded 20 complaints about the engine cooling of the 2006 Toyota Prius, 1% of the 1,439 complaints for this model year. Where a mileage was given, the median is 46,100 miles. 1 of these say a crash was involved, according to the filers.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“I have a Toyota Prius (hybrid). A little cat got underneath my car without me noticing it and since this type of car does not turn the engine when you turn the car on, it does not make any noise (when you turn the car on it runs from the battery at the beginning... Eventually the engine kicks in) since the car made no noise the little cat did not notice that the car had been turned on and the little cat did not move away from the car. …”

NHTSA complaint #10276023, filed 2009-07, 77 miles

“Starting up my Toyota Prius coming out of a car wash the engine stuck with high revs. I confirmed it was not the car mat because I had been in the car wash and that was my thought. Could not get the engine to stop over revving (was consistently high). Never went into high speed. Was able to control it by putting it in low gear and neutral at the intersections. In less than 1 mile I turned off the car and did not have any follow-on problems. Not the car mats.”

NHTSA complaint #10304720, filed 2010-02, 57,500 miles

“I have a 2006 Prius. When going over bumps, I experience a total loss of power for 1 or three seconds -generally. A yellow light also comes on the dash board. It often happens daily. I have only had one or two experiences when the power didn't return so quickly and then I was afraid because I had no brakes and was just skidding. I believe that I have seen this problem discussed by other Prius owners of chat sites. It can occur at any mileage speed but I was only able to put a mileage number in the box can it be fixed?”

NHTSA complaint #10306391, filed 2010-02, 100 miles

“A gasoline and or oil smell in the car that permeates everything in the car. My clothes, computer bag, papers, just everything that comes in contact with the inside of the car. I also get sick from the odor ie headaches, nausea, blurred vision, dizziness. I also have a burning taste in my mouth, throat and eyes. I have been to the doctors and they there is no other reason for me to be feeling the way I do and that it is the environment of my car that is producing this very serious irritant . …”

NHTSA complaint #10167777, filed 2006-09, 1,000 miles

“I own a 2006 Toyota Prius. Before I heard of any complaints of the engine revving at high speeds, this occurred to me when the car was only 1 year old, while it was in park. The engine suddenly started revving at high speed shortly after I pressed the power bottom. I thought the engine may have been cold. I was still in park when I turned the engine off, waited about 2 minutes, then pushed the start button again with the engine returning to normal. Around this time I had heard of a problem with the cruise control causing this problem, but it has not occurred since.”

NHTSA complaint #10304738, filed 2010-02, 15,000 miles

Related service bulletins

Engine cooling: other model years

YearComplaintsShare of year
202214%
201913%
201838%
201711%
201611%
201210%
201151%
2010331%
200971%
2008161%
2007171%
2006201%
2005646%
20048915%
20031111%
2002117%
20011811%

Other parts of the 2006 Toyota Prius

Exterior lighting
941 complaints
Brakes
210 complaints
Electrical system
152 complaints
Vehicle speed control
84 complaints
Other or unknown
44 complaints
Air bags
30 complaints
Engine
25 complaints
Steering
22 complaints
Transmission and drivetrain
22 complaints
Fuel system
20 complaints
Equipment
18 complaints
Electronic stability control
15 complaints

← All problems reported for the 2006 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