Problems · NHTSA complaints
2006 Toyota Prius problems
Owners filed 1,440 complaints about the 2006 Toyota Prius with NHTSA between Jan 2006 and Oct 2026. The most-cited component is exterior lighting (941).
Complaints
1,440
Filed with NHTSA
Crashes
82
Reported by owners
Fires
5
Reported by owners
Injuries
48
People reported injured
Deaths
1
Reported to NHTSA
Complaints by component
One complaint can cite several components
- Exterior lighting941
- Electrical system153
- Service brakes, hydraulic94
- Vehicle speed control84
- Service brakes73
- Service brakes, electric45
- Air bags30
- Engine25
- Equipment23
- Steering22
- Power train22
- Engine and engine cooling20
- Traction control system19
- Electronic stability control (esc)15
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
Data from NHTSA Complaints API · synced Nov 4, 2026NHTSA vehicle page
When complaints were filed
Does it get worse with age? Complaints per calendar year filed
17
33
220
396
349
60
52
49
46
44
41
24
39
30
10
8
8
3
6
2
3
View as table
| Model year | Complaints filed per calendar year |
|---|---|
| 2006 | 17 |
| 2007 | 33 |
| 2008 | 220 |
| 2009 | 396 |
| 2010 | 349 |
| 2011 | 60 |
| 2012 | 52 |
| 2013 | 49 |
| 2014 | 46 |
| 2015 | 44 |
| 2016 | 41 |
| 2017 | 24 |
| 2018 | 39 |
| 2019 | 30 |
| 2020 | 10 |
| 2021 | 8 |
| 2022 | 8 |
| 2023 | 3 |
| 2024 | 6 |
| 2025 | 2 |
| 2026 | 3 |
Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.
Top problems in owners’ words
Verbatim from NHTSA complaints, newest first
Exterior lighting
941 reports5 crashes
“The right or left headlight will rabdomly turn off, and tyrn back there 8s no ryme or readon to it,and while driving at night it is cery dangerous, aparebtly its not just this car, this is a common issue and it needs to be fixed”
Electrical system
153 reports2 crashes2 fires
“The contact owns a 2006 Toyota Prius. The contact stated that the vehicle failed to turn off intermittently, requiring that the power button to be pressed continuously until the vehicle turned off. In addition, the instrument cluster was inoperable often. The contact stated that a chime failed to engage while reversing. A triangle warning light was previously illuminated. The message "Tire Pressure Maintenance Needed" was displayed. The vehicle was taken to the dealer, where it was diagnosed that the failure was primarily associated with the instrument cluster. The dealer determined that the instrument cluster and other unknown components needed to be replaced.”
Service brakes, hydraulic
94 reports11 crashes
“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.”
Vehicle speed control
84 reports18 crashes2 fires1 related recall
“The light up display for the odometer, fuel gauge, and speedometer does not always light up. When it is not lit, the cruise control and any warning and informative alarms/lights also do not work. This is a well-known issue among owners of these cars, related to the capacitors on the circuit board for the display being defective, and there is extensive documentation of it online. It may also have had a technical service bulletin released for the issue, but I'm not entirely sure. The light goes out intermittently and is not always consistently out. I did mention it to the service personnel when I took it in to get recalls repaired recently, and they didn't seem surprised or unaware of the issue. I did not ask them to diagnose or fix it, as I know I can get it done for a better deal elsewhere.”
Service brakes
73 reports16 crashes1 fire
“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. I'm asking for a complete and thorough investigation into this and a satisfactory resolution to this so that it doesn't happen to anyone else. There were no warning indicators of any kind prior to the accident plus I had paid over 2000 dollars' worth of work and a set of 4 new tires put on this vehicle prior to this incident. Please advise and thank you.”
Service brakes, electric
45 reports7 crashes
“WHEN BRAKING QUICKLY USUALLY ON ROUGH SURFACES, WET ROADS, SLOPES BRAKES TEMPORARILY FAIL AS IF NO CONTROL OVER THE CAR GIVING ME AN ADRENALINE RUSH. I HAVE BEEN DRIVING LIKE THIS FOR 4 YEARS THINKING IS THE CHARACTERISTIC OF PRIUS. JUNE 30TH 2011, I STEERED INTO THE PARKING LOT AND WAS PARKING ON THE FIRST SPOT AT THE RIGHT IMMEDIATELY AFTER ENTRY TO PARKING LOT AT THE SPEED OF 5 MPH. APPROXIMATELY HALF WAY TO CURB I WITHDREW MY FOOT OFF THE GAS PEDAL AND PUT ON THE BRAKES SLOWLY. I WAS EXPECTING THE CAR TO HALT PRIOR TO THE CURB LINE AS USUAL. BUT IT DID NOT STOP ON THE CONTRARY IT ACCELERATED AND WENT OVER THE CURB AND RIGHT ON THE FENCE. THE FENCE WAS APPROXIMATELY 2 FEET FROM CURB; BEFORE IT WENT ON FENCE I LOOKED AT MY FEET AND MADE SURE IT WAS ON THE BRAKES AS COULD NOT BELIEVE WHAT WAS HAPPENING TO THE CAR AND YES I AM 100% SURE IT WAS ON BRAKES. I ALSO APPLIED PARKING BRAKES AND PUT CAR IN NEUTRAL AND SHUT OFF THE POWER, WHEN IT STOPPED OVER THE FENCE. I HAVE REPORTED THIS TO DEALER AS THE CAR HAD BEEN SERVICED 4 WEEKS PRIOR TO THIS INCIDENT AT 32,431 MILES. THE DEALER DID HEALTH CHECK SCAN TWICE TAKING 6 HOURS FOR EACH SCAN. AFTER FIRST SCAN I WAS…”
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 4, 2026
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.