Which parts fail
Components named in complaints (service brakes, ABS, rotors and pads, parking brake).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2006 Toyota Prius owners, lightly cleaned up (personal details are redacted by NHTSA).
I was involved in an auto accident on 4/20/2026 @ 6:23 PM. I was driving a 2006 Prius and the vehicle in front of me stopped to make a left turn. I applied my brakes, which grabbed slightly and then released. I then had to hit the brakes hard and they did the same thing again. I ended up rear-ending the vehicle in front of me and had to go to the hospital. I've been out of work since the accident, and I feel this was not my fault DUE TO FAULTY BRAKING SYSTEM ON THIS VEHICLE. My vehicle was declared a total loss, by the insurance company After doing my own research I have found many accidents with this type of vehicle that has had rear end accidents with injuries and some fatalities. it also shows not only this 2nd generation with this problem however the 3rd generation Prius as well. I have been out of work since the accident. …
The contact owns a 2006 Toyota Prius. The contact stated while getting into the vehicle, there was a loud buzzing sound coming from the brakes. The contact stated that the brake, anti-slip regulation, ABS, and vehicle stability control warning lights were illuminated on the instrument panel. The contact stated that the brake was inoperable. The vehicle was taken to an independent mechanic and diagnosed with an accumulator failure. The part was replaced; however, the failure recurred consistently. The manufacturer was not notified of the failure. The approximate failure mileage was 243,000.
I am looking to receive a little bit more assistance regarding my daughter's first car that she worked very hard for. It is a 2006 Toyota Prius. It was garage-kept and owned by an older couple who only put 85,000 miles on it. It is really a gem of a car. Soon after we registered the car, my daughter was out driving with her father. While going through a 4-way stop, she found that the brakes had failed and she was unable to stop at the intersection. Luckily, she was with her father, and he was able to give her verbal instruction to guide the both of them to safety. Upon further investigation, we learned that there was a recall on the Brake Actuator Assembly in 2016. Which is the part that has failed and almost caused my 16 year old daughter to crash the car she worked hard for. I contacted the Toyota Brand Engagement Center. …
When I brake and also go over a bump my 2006 Prius lurches forward. The traction control light illuminates. The faulty traction control system sent me into a 1-2 second lurch forward with zero brakes. Then the brake engage then I can stop. I told the dealer about it and they told me there is reprogram fix for the ECM but only 2008 to 2009 which a 2nd generation as my car since 2nd generation is 2005 to 2009 but they said we can do it for my car. I am not sure how they decide what year it can be applied to within the same generation which has the same exact parts. I am sure many prius owners have the same issue, you can see it from the bumpers detached at one side on the front and maybe both side becuase this how it was when i got my car who ever owned must have went through braking issue and i am sure he was shocked sinc i have driven so many csrs and non of them have this issue.
Vehicle, upon turning on ignition/starting and putting in either drive or reverse gear, on level surface with brakes still applied will roll forward or backward. This has happened several times but usually at first start up for the day No warning lights(brake or other) are displayed Brake pedal is firm /no problems with pads/shoes ,brakes work fine any other time. I have called the local toyota dealer and toyota(company) and told them about this safety issue but was told i would have to pay to get it diagnosed . No one other than my wife child and i experienced this problem . Fortunately no one has gotten hurt. Was suprised to learn that this problem is not a part of a recall.
Brake actuator is not working properly and will eventually get us in an accident. We bought the car brand new. There is a recall for this issue, but we were never notified by Toyota. After contacting Toyota, they claim we are out of the recall dates and will do nothing. I have requested a copy of the letter they should have sent you notifying us of this issue. They cannot provide one. I would like to be able to fix this car; I cannot afford another car or such an expensive repair caused by a defective Toyota part. Please, help us. Thank you.
Discovered through failures repeated to dealers that certain items (Brakes, dashboard, et. al.) were recalled by Toyote. Never received recall notices. Contacted Toyota who demanded the vehicle be taken to dealer and now refuses to do anything. Have complete documentation to attach to this communication. Essentially: Dashboard failed, brakes failed when auto in operation. Likely there are UNKNOWN additional recalls, etc. of which we were not noticed
Power braking goes out and ringing in car with brakes and abs light on. Have to press extra hard to brake car. Also anther time coming out of a parking lot in reverse and brakes just stopped car as if I had hit something but had not hit anything.
The actuator failed. The car is no longer safe to drive. This is a known issue. The company refused to fix the issue or recall the car. The warning lights and a loud beep are present if the vehicle is started.
My wife [redacted] had a serious accident in the parking lot of the victorian on main st in santa monica on Wednesday September 2. From standstill, her 2006 Prius suddenly accelerated to a very high rate on its own and the car's brakes were completely non-responsive. In this relatively confined parking area, after a frightening period of trying to regain control of the vehicle, she made a split-second decision to crash into a tree at a relatively high speed in order to avoid steering the car onto main st. And causing a much more serious accident that would have impacted many people, automobiles and public and private property and possibly resulted in multiple deaths and multiple serious injuries. She sustained a broken foot. Her passenger sustained bruising. Both were taken by ambulance to st. John's hospital. Both airbags deployed. The 2 occupants were wearing seat belts. …
Brake complaints in other Prius years
Frequently asked questions
How common are brake problems on the 2006 Toyota Prius?
NHTSA has 210 complaints about the brakes of the 2006 Toyota Prius, 15% of the model year's 1,439 complaints. The component named most often is antilock/traction control/electronic limited slip › control unit/module (14 mentions).
Is there a recall for 2006 Toyota Prius brake problems?
No. NHTSA lists no brakes recall for the 2006 Toyota Prius, though it has 6 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2006 Toyota Prius brake problems start?
Half of the complaints with a recorded mileage happened before about 52,000 miles, and 30% before 25,000 miles.
Is it dangerous?
Owners linked 34 crashes, 1 fire and 12 injuries and 1 death to brakes problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.