Problems · NHTSA complaints
2006 Toyota Highlander problems
Owners filed 279 complaints about the 2006 Toyota Highlander with NHTSA between Aug 2005 and Nov 2026. The most-cited component is service brakes (72).
Complaints
279
Filed with NHTSA
Crashes
29
Reported by owners
Fires
4
Reported by owners
Injuries
30
People reported injured
Deaths
1
Reported to NHTSA
Complaints by component
One complaint can cite several components
- Service brakes72
- Vehicle speed control43
- Electrical system26
- Service brakes, hydraulic23
- Power train22
- Engine and engine cooling21
- Engine19
- Steering16
- Visibility/wiper12
- Air bags12
- Visibility12
- Electronic stability control (esc)11
- Service brakes, electric8
- Fuel/propulsion system7
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 11, 2026NHTSA vehicle page
When complaints were filed
Does it get worse with age? Complaints per calendar year filed
2
11
11
10
8
59
25
12
15
16
15
10
6
6
6
24
20
4
4
3
5
7
View as table
| Model year | Complaints filed per calendar year |
|---|---|
| 2005 | 2 |
| 2006 | 11 |
| 2007 | 11 |
| 2008 | 10 |
| 2009 | 8 |
| 2010 | 59 |
| 2011 | 25 |
| 2012 | 12 |
| 2013 | 15 |
| 2014 | 16 |
| 2015 | 15 |
| 2016 | 10 |
| 2017 | 6 |
| 2018 | 6 |
| 2019 | 6 |
| 2020 | 24 |
| 2021 | 20 |
| 2022 | 4 |
| 2023 | 4 |
| 2024 | 3 |
| 2025 | 5 |
| 2026 | 7 |
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
Service brakes
72 reports4 crashes
“My brake actuator assembly failed while driving. The brakes stopped working. The cost to repair is over $3,000. This is a fairly common problem in the 2006 toyota highlander hybrid. In fact, Toyota extended the car's warranty to cover this issue, but it expired in 2017. The problem usually occurs once the car has approximately 150k miles which is likely outside the warranty period. This is extremely dangerous.”
Vehicle speed control
43 reports14 crashes1 fire1 related recall
“THE BRAKE ACTUATOR IS FAILING AND IS MAKING LOUD NOISES. THE CAR DOES NOT BRAKE NORMALLY. I HAVE REPORTED BRAKING PROBLEMS SINCE I BOUGHT THE VEHICLE IN 2007. WHEN IT HITS A BUMP IT ACCELERATES AND I MUST STAND ON THE BRAKES SO I DO NOT HIT SOMEONE. IT LURCHES FORWARD WHEN IT HITS A POTHOLE OR SOME KIND OF OBSTRUCTION IN THE ROAD. WHEN I WORKED DOWN NEAR THE BUS STATION I WOULD HIT THE AREAS IN THE ROAD WHERE THE BUSES CREATED BUMPS IN THE ROADWAY AND IT WOULD LURCH FORWARD. I REPORTED THIS NUMEROUS TIMES AT NORTH BAKERSFIELD TOYOTA. I RECENTLY WENT IN TO REPORT THE NOISE I WAS HEARING AND THEY FINALLY FIGURED OUT THAT THE BRAKE ACTUATOR IS FAILING. I WAS TOLD THAT IT WAS NOT A HAZARD BUT THEY COULD NOT TELL ME WHEN IT WILL TOTALLY FAIL. I BELIEVE IT IS A SAFETY HAZARD AND THERE HAS BEEN A PROBLEM FROM DAY ONE”
Electrical system
26 reports
“While normally driving on the highway and without no warning the vehicle the power steering stops working , it just dies with no power and dash lights warning start to flash and Check Hybrid System turns on. I am not a mechanic nor a technician . The mechanic disconnected the ground cable after waiting about 5 minutes and it resets the system. He told me that it has something that may be caused by some electrical problem . He thinks that it has to do with a recall about some soldering electrical part in the inverter control. This has happened in 3 more occasion and I've been lucky and i have time to let it go to side of the road and i disconnect the ground wire for 5 minutes and connect it back and it resets and then starts to work normal. Since the vehicle stalls completely i fear that this could cause an accident or lost of life due to other vehicles coming behind at high speeds . Please i need help!”
Service brakes, hydraulic
23 reports5 crashes1 related recall
“The contact owns a 2006 Toyota Highlander. The contact stated that while driving approximately 60 MPH, the vehicle failed to decelerate while the brake pedal was depressed. The contact stated that excessive pressure was needed on the brake pedal to stop the vehicle. The ABS and ESC warning lights were illuminated. In addition, there was an abnormal sound coming from underneath the vehicle. The vehicle was towed to a local independent mechanic, where it was diagnosed and determined that the ABS unit needed to be replaced. The vehicle was towed to another independent mechanic for a second opinion, and it was confirmed that the ABS unit needed to be replaced. The vehicle was taken to a local dealer, where it was diagnosed and determined that the brake actuator needed to be upgraded. The vehicle was diagnosed, and parts were ordered for the repair. The manufacturer was not made aware of the failure. The failure mileage was approximately 195,000.”
Power train
22 reports1 crash
“Two problems being reported are severe safety issues, and could result in injury, death, and/or property damage. Problem 1: While driving, the brake pedal suddenly went all the way to the floor, and the car would not stop. To avoid hitting the car in front at a stop sign, I had to turn the wheel, resulting in running through the stop sign and onto the grass and shoulder before the car finally stopped. Multiple dashboard warning lights appeared. After stopping, the brakes momentarily returned but failed again within 2-3 minutes. A loud, high-pitched, piercing whistle sound began, indicating a complete loss of brakes. The car had to be towed 200 miles back home. It is not safe to drive the car without functioning brakes. The OBD scan codes are: C1256 (accumulator low pressure), C1391 (abnormal leak of accumulator pressure), and C1256 (accumulator low pressure). Problem 2: When starting the car, the brakes are applied first, and then the car is placed in gear. The car involuntarily and immediately jumps forward or backward and continues to move, even though the brakes are being applied. Having the foot on the brakes has NO EFFECT on the car moving! The car should…”
Engine and engine cooling
21 reports1 fire
“TL* THE CONTACT OWNS A 2006 TOYOTA HIGHLANDER. WHILE DRIVING APPROXIMATELY 15 MPH, THE TEMPERATURE GAUGE INCREASED. IN ADDITION, THE TRACTION, CHECK ENGINE, AND VHC WARNING INDICATORS ILLUMINATED. AN INDEPENDENT MECHANIC STATED THAT COOLANT FLUID WAS LEAKING AND AN ENGINE KIT NEEDED TO BE INSTALLED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS AWARE OF THE ISSUE. THE VIN WAS UNAVAILABLE. THE APPROXIMATE FAILURE MILEAGE WAS 130,000.”
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 11, 2026
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.