2006 Toyota Highlander Powertrain (other) Problems

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 not move at all when the brakes are being applied. To stop the movement, I must quickly pump the brakes repeatedly. This occurs every time the car is placed into gear after starting the engine, causing it to jump forward or backward and continue moving despite brake application. Both problems are severe safety issues, and could result in injury, death, or property damage.

NHTSA ID

11601445

Incident

Jul 9, 2024

Power brakes stopped working while driving due to bad brake actuator. Vehicle shut down while driving due to power train system.

NHTSA ID

11488120

Incident

Oct 4, 2022

WHILE DRIVING MY VEHICLE ALL THE LIGHTS ON MY DASHBOARD ILLUMINATED. MY VEHICLE LOST POWER AND I HAD TO PULL OVER. IT DIED THERE. I WAS ON BELFIELD AVE AND GRATZ STREET IN PHILADELPHIA, PA . I SUBSEQUENTLY HAD IT TOWEDBACK TO MY RESIDENCE.

NHTSA ID

11385175

Incident

Apr 12, 2020

Mileage

174,000 mi

THE VEHICLE WILL OCCASIONALLY SURGE IN SPEED MOMENTARILY, MOSTLY NOTICED WHEN OPERATING BELOW 50 MPH. IT IS MORE PREVALENT AT LOWER SPEEDS. WE ARE THE ORIGINAL OWNER.THIS HAS BEEN AN ONGOING SITUATION SINCE THE VEHICLE WAS NEW. HYBRID MODEL. IT HAS BEEN INSPECTED BY THE DEALER WITH NO ISSUES FOUND.

NHTSA ID

11016298

Incident

Aug 15, 2017

Mileage

179,800 mi

I HAVE HAD AXLES BREAK WHILE DRIVING AFTER THEY WHERE REPLACE AND THEY SAY THERE IS NOTHING A MATTER WITH THE FRONT END. AND THE FRAME IS RUSTED AFTER A YEAR AND IT IS BREAKING.

NHTSA ID

10854150

Incident

Apr 2, 2016

Mileage

107,000 mi

DRIVING ON THE HIGHWAY, CAR BROKE DOWN AND STOPPED FUNCTIONING. TOOK THE VEHICLE TO THE DEALERSHIP AND WAS CHARGED $4259.81 TO REPLACE TRANSFER CASE. AFTER SOME INVESTIGATING, I DISCOVERED THAT TOYOTA HAD ISSUED A TSB (TC008-07) TO REPLACE THE RIGHT-HAND BEARING SEAL THAT WOULD HAVE PREVENTED THIS. MY CAR WAS IN SERVICE AT THE DEALERSHIP MULTIPLE TIMES PRIOR WHILE UNDER WARRANTY, AND THEY COULD HAVE PREVENTED THIS BY REPLACING THE SEAL. *TR

NHTSA ID

10649715

Incident

Sep 15, 2012

Mileage

49,389 mi

2006 HIGHLANDER GENERATES ROARING TYPE NOISE HEARD FROM THE FRONT END WHILE DRIVING AT HIGHWAY SPEEDS AND HUMMING NOISE HEARD AFTER 40MPH. TOYOTA SERVICE DEALER FOUND THAT FRONT DIFFERENTIAL IS BAD. ESTIMATE $4,500 TO REPAIR. *TR

NHTSA ID

10609592

Incident

Jul 10, 2014

Mileage

67,152 mi

I WAS DRIVING IN MY HIGHLANDER WITH MY DAUGHTERS IN THE BACK SEAT WHEN SUDDENLY OUT OF NO WHERE ALL THE ALERT LIGHTS CAME ON AND THERE WAS NO POWER AT ALL - THE GAS PEDAL WAS NON FUNCTIONAL - I WAS IN THE FAR LEFT LANE OF A AN INTERSTATE AND FORTUNATELY I WAS ABLE TO GET OFF THE ROAD AND PULL THE CAR OUT OF TRAFFIC AS IT ROLLED TO A STOP. I WAITED ON THE CROWDED INTERSTATE FOR TWO HOURS FOR A TOW. I WAS TOLD THAT THE HIGHLANDER HYBRID INVERTER HAD FAILED - THE DEALER REPLACED THE PART THAT WEEK AND THE CAR DRIVES NORMALLY NOW. I WAS ADVISED THAT IN FACT THIS IS A KNOWN PROBLEM. ONE MONTH LATER IRONICALLY I RECEIVED IN THE MAIL NOTICE FROM TOYOTA THAT MY MODEL OF HIGHLANDER IS BEING RECALLED FOR THE INVERTER REPLACEMENT THAT HAD JUST CAUSED THIS EXTREMELY UNSAFE VEHICLE FAILURE JUST ONE MONTH PRIOR. *TR

NHTSA ID

10424256

Incident

Jul 9, 2011

Mileage

62,000 mi

I HAVE A 2006 TOYOTA HIGHLANDER HYBRID. IT HAS THE FOUR WHEEL DRIVE "I"SYSTEM. ANY TIME THE VEHICLE SENSES SLIPPING IN THE TIRES IT CUTS POWER TO ALL WHEELS. I HAVE BEEN STUCK IN VERY MANAGEABLE CONDITIONS. NOT ONLY DO YOU NOT GET 4 WHEEL DRIVE TO HELP OUT OF ADVERSE CONDITIONS, YOU GET NO DRIVE TO ANY WHEELS AND ARE LEFT STUCK. I SPOKE WITH TOYOTA AND THEY SAID THAT THE VEHICLE IS DESIGNED TO DO THIS TO PREVENT DAMAGE TO THE HYBRID SYSTEM. THERE IS NO INFORMATION IN ANY OF THE LITERATURE PROVIDED WHEN PURCHASING A VEHICLE. THIS VEHICLE SHOULD NOT BE SOLD TO ANYONE WHO DRIVES IN SNOW OR ON ANY THING OTHER THAN AN IMPROVED ROAD. TOYOTA ACKNOWLEDGED THAT THEY HAVE RECEIVED OTHER COMPLAINTS REGARDING THIS ISSUE BUT WILL NOT CORRECT IT, NOR INFORM BUYERS ABOUT IT'S DESIGN. THIS WILL UNDOUBTEDLY STRAND DRIVERS IN ADVERSE CONDITIONS THEY DEEM MANAGEABLE. *TR

NHTSA ID

10246565

Incident

Oct 15, 2008

Mileage

1 mi

LAST SUNDAY, OCTOBER 14, 2007, I WAS DRIVING MY 2006 HIGHLANDER HYBRID AT HORMIGUEROS, PR (ZIP CODE 00660), WHEN SUDDENLY THE VEHICLE'S STEERING GOT REALLY STIFF. IT ALL HAPPENED AT A CRUISING SPEED OF 40-45 MILES PER HOUR WHEN SUDDENLY THE VEHICLE'S TURNING WHEEL GOT HARD AND IT GOT REALLY DIFFICULT TO CONTROL. I SURELY GOT THE SCARE OF MY LIFE. I EXPERIENCED SOME DIFFICULTIES WHILE TRYING TO STOP THE VEHICLE AND PARK IT IN A SAFE PLACE. THE VEHICLE'S CONTROL PANEL INDICATED THE FOLLOWING MESSAGE: VERIFY THE HYBRID SYSTEM. WE TOOK IT THE SAME DAY TO THE NEAREST DEALER (THE ONE THAT I ALSO BOUGHT THE VEHICLE) TOYOTA DEL OESTE, LOCATED AT HORMIGUEROS, PR (00660). MY VEHICLE HAS RECEIVED EVERY SERVICE RECOMENDED BY TOYOTA SINCE I BOUGHT IT. IN OCTOBER 19, 2007 TOYOTA DEL OESTE GAVE ME A QUOTE (NUMBER PQ2105) FOR $5,957.45 FOR THE REPAIRING COSTS OF MY VEHICLE. THE QUOTE SPECIFIED A TRANSAXLE ASSY FOR $4867.71, PLUS $700 FOR 14 LABOR HOURS AND A LOCAL TAX OF $389.74. THE DEALER INDICATED THAT ONCE THE TRANSAXLE WAS REPLACED IT WILL HAVE ONE YEAR ONLY WARRANTY. THEY ALSO INDICATED THAT THE TRANSAXLE ASSY WAS NOT PART OF THE HYBRID SYSTEM SO THE WARRANTY CAN NOT COVER THE REPAIR COSTS (MY VEHICLE HAD APROX. 66,000 MILES. ACCORDING TO TOYOTA, WARRANTY FOR HYBRID COMPONENTS IS 8 YEARS / 80,000 MILES). MY CONCERNS: 1) HOW I, AS A CONSUMER, MAKE SURE THAT TOYOTA IS NOT MAKING ME PAY FOR A DEFECT THAT MY VEHICLE MAY HAVE FROM THE FACTORY? 2) HOW I AM GOING TO BE SURE THAT IF THEY REPLACE THE TRANSAXLE ASSY I WILL NOT BE EXPOSED AGAIN TO AN UNSAFE SITUATION RELATED WITH A SIMILAR PROBLEM (REMEMBER THAT A LARGE PERCENTAGE OF ROADS ACROSS THE ISLAND OF PUERTO RICO ARE BUILT OVER MOUNTAINS). 3) HOW DO I REALLY MAKE SURE THAT THE DEALER IS TRULY MAKING ME PAY FOR A COMPONENT THAT IS NOT PART OF THE HYBRID SYSTEM AND CAN NOT BE COVERED BY THE WARRANTY (REMEMBER THAT, ALTHOUGH OTHER MANUFACTURERS MAYBE AVAILABLE, HYBRID TECHNOLOGY IN PUERTO RICO IS DOMINATED BY TOYOTA. *TR

NHTSA ID

10206742

Incident

Oct 14, 2007

Mileage

66,000 mi