Toyota Highlander start-stop problems

Filed Mar 25, 2026 · Brakes, Electrical · TX

March 5th purchased a battery from Autozone Z net Fit Match that caused cascading electrical and life -safety risk while traveling from hewitt, TX to Washington DC for our families spring break trip including 4 minor children. Component: 12-Volt Battery / Electrical System / Power Steering / Service Brakes Summary: Vehicle suffered catastrophic failure of Power Steering and Braking systems while in motion due to the installation of an incompatible lead-acid battery recommended by AutoZone’s 'Z-Net' catalog. Despite Toyota Technical Service Bulletin T-TT-0523-19 (Jan 2019) stating this VIN requires an Enhanced Flooded Battery (EFB/AGM) for its Stop-Start system, the retailer’s database continues to misidentify standard batteries as compatible. This mismatch causes a voltage drop that disables critical safety modules ('Limp Mode'). I have video evidence of the catalog error. This is a systemic misrepresentation affecting 2017+ Toyota Highlander safety compliance.

Filed Mar 12, 2026 · Electrical · 86,530 miles · FL

The contact owns a 2019 Toyota Highlander. The contact stated that while driving approximately 30 MPH, the vehicle stalled; the contact shifted the vehicle into park(P) and restarted the vehicle for the vehicle to return to normal operation. No warning lights were illuminated; however, the “Auto START/STOP Failure” and “See Dealer" messages were displayed on the instrument panel. The failure reoccurred on several occasions. The vehicle was taken to a dealer, where it was diagnosed, and determined that the wiring harness needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 86,530.

Filed Feb 8, 2026 · Engine · KY

My 2025 Acura MDX (under 10,000 miles) has failed to restart after the automatic idle stop engaged at stoplights and drive-thru lines at least 7 separate times. When I release the brake, the engine often remains off and the vehicle will not move, leaving me stopped in traffic. I have not yet required a jump start, but on several occasions the vehicle came very close to not restarting at all. This most recently occurred at a sandwich shop drive-thru. These incidents occurred in normal drive mode and in normal weather conditions. No abnormal driving conditions were present when the failures happened. Other owners online report the same problem, with some needing to carry jumper cables. I believe this is a serious safety risk because the vehicle can stall unexpectedly in intersections and traffic when the auto stop-start system activates. I am now concerned about relying on this vehicle in traffic because I cannot trust it to restart when stopped.

Filed Nov 30, 2025 · Electrical, Steering · MD

Issue 1: I reported transmission issued to the dealership/service center where I purchased the car. They assured me its just the electronic transmission trying to find the right gear while driving. Continued to complaint about the jerks and shifting. Dealer warranty expired, then they agreed that I needed a new transmission. Fortunately I had an outside extended warranty otherwise they'd probably would have waited until that ended too. Status post the transmission, tuning, sensor replacements, spark plug replacement, and TPMS replacements all in one service. Prior to my warranty expiring, AWD, engine light and hard transmission shifts began with the new transmission. Returned repeatedly from April to November with no resolution. However, they did have me pay to replace sensors I had replaced in April several times and obtain a new battery. Issue 2: After "new" batter the car's electrical issues worsened resulting in a power failure while driving at 75 miles an hour and losing complete control of the vehicle. The power failure shut down the electronic shifter, power steering, All Wheel Drive, Traction control in raining conditions and ultimately the power assisted brakes. returned the vehicle to the service department for additional "testing" after taking a video of the fault messages were the car electrical systems shut down to auto start stop function warning light. I'm a skill driver and was able to avoid crashing during the incidents. The photos are from the latest day I dropped the vehicle off for review I took a video of the vehicle powering down for their records. They are now stating since they can't figure it out maybe I should pay them to replace the electrical wiring harnesses throughout the vehicle; a cost which exceeds the vehicle's worth to me. I'm convinced now more than ever they knew there was an electrical issue with the vehicle but waited me out and if I would have crashed and died all the blame would have been on me.

Filed Aug 15, 2024 · Acceleration, Engine · OH

From a stop or slow roll (0-10 mph), significant hesitation is experienced after pushing the gas. The engine will not respond for a few moments and then all of a sudden it will take off in a jerking manner. Note that this is experienced when the engine auto start/stop is deactivated, so it is not from the delay of the engine starting when activated. This hesitation causes a near miss safety situation in many normal driving activities, but the highest risk is when turning left in front of oncoming traffic. I brought the vehicle to a Toyota dealership for the condition, noting Toyota's Service Bulletin T-SB-0087-23 for this exact issue, but after 3 days and 40 miles of the dealership driving it, they stated that they cannot reproduce the issue. There are no warning signs or lamps, and this issue has been occurring since the vehicle had about 1,000 miles, and the vehicle now has 20,000 miles on it.

Filed Jul 8, 2024 · Electrical · KY

2017 Highlander with the Auto Start/Stop. It will sometimes go completely dead when idling, like at a stop light. Completely dead meaning zero electricity - no lights. This will last a couple of seconds. But one day, the car died at a stop light right. No power. Completely dead. Couldn’t turn on my hazard lights Gears were stuck. Couldn’t shift gears.

Filed Aug 9, 2022 · Electrical, Engine · 50,000 miles · SC

The contact owns a 2018 Toyota Highlander. The contact stated that while driving at an undisclosed speed, the vehicle lost motive power after coming to a full stop at a traffic light. The vehicle was taken to an independent mechanic and the dealer; however, the mechanic and the dealer were unable to duplicate the failure. The contact related the failure to a faulty Auto Start/Stop feature. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 50,000.

Filed Feb 14, 2022 · Engine · NY

The vehicle's automatic stop-start feature malfunctioned and shut the engine off while I was driving with my 3 children in the car. Our safety was at risk because the car shut off in the middle of the road and we had to wait for an hour for the tow truck to come and give us a jump. There was no prior warning before the car shut off. Afterwards the message "High Power Consumption Partial Limit on AC/Heater Operation" came on I was very nervous for my kids and I safety.

Filed Oct 17, 2021 · NY

The stop/start feature on the 2017 Highlander appeared to fail. In stop and go traffic, the vehicle stalled. And would not start. The vehicle started back up with a battery boost. This incident presented a danger to the person in this vehicle and other vehicles around it. The vehicle was brought to Toyota Service. They could not reproduce the issue. A fault was found in the battery, the battery was replaced. Approximately 11 days later. This vehicle came to a stop at a red light, stop/start feature engaged. The vehicle did not start back up, it stalled.

Filed Sep 14, 2021 · Engine, Fuel system · TX

Our 2019 Highlander xle ( VIN [XXX]) is currently at the Lonestar service department. Service Rep ([XXX]), Assistant Sales Manager [XXX], and [XXX], were fully advised of the stall problems of our vehicle on 9/13/2031. Our paperwork on previous tall repairs were left with [XXX]. On 9/13/2021, we left our 2019, Highlander XLE in the Toyota Lonestar Service department, Lewisville, Texas, for stalling (would not drive) repairs. They were fully notified of several stall episodes. The most recent stall was while driving, 30 mph in Denton, Texas, in heavy traffic, in the middle of an intersection. My wife was terrified when the car stalled. The screen went black. Her car mileage was 9344 mileage at this most recent problem 9/2021. My wife when she starts the car leaving the house. She always going through the procedure to turn off the "start/stop" function, before leaving our residence ("manually turns off the auto stop-start feature"). This vehicle has stalled, several times, in heavy traffic while wife was driving, putting my wife in personal danger. The vehicle is very much at risk of a serious traffic accident. The Toyota dealer, in Denton Texas, has been made aware this problem, when it was returned for service repairs several times. They have not fixed this on going problem at all. This car is a "Lemon". This problem has occurred (stalls occurred on 3/16/2021, and 3/26/2021, 5/17/2019)The care was taken to Lonestar Toyota and Denton Toyota for repairs on these stall occasions. My wife says there were additional stall episodes. The Denton Police have a report of my wife being stalled on I-35 in heavy traffic on 3/5/2021. We waited in a police car for four hours for a tow truck, because of dangerous fast traffic. My wife says two other police departments have similar reports of these stall episodes, when police responded, (Flower Mound Police was one she recalled. https://www.consumerreports.org/car-recalls-defec INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C.