Which parts fail
Components named in complaints (battery, alternator, wiring, ignition, instrument cluster, infotainment).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2015 Toyota Highlander owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2015 Toyota Highlander. While stopped at a gas station with the engine on, the contact's wife smelled an abnormal, burning odor coming from the vehicle without warning. Upon inspecting the vehicle, the contact's wife saw flames shooting from the dashboard near the infotainment system; the contact's wife and children immediately exited the vehicle. The fire department was called to the scene and extinguished the fire. The contact's wife suffered minor burns on her right hand but did not seek medical attention. The contact had the vehicle towed back home where it remained in the contact's possession. The manufacturer was notified of the failure and a claim was filed. The vehicle had yet to be diagnosed or repaired. The failure mileage was approximately 104,000.
My Highlander had a strange burning smell and we couldn't find where it was coming from. We took it to a shop where they checked everything over and suggested that the smell was our brakes. They lubricated the brakes and replaced my tires and struts. When I went to pick up the vehicle I still noticed the strange smell, and I had the mechanic come out and check. He suggested that it was the leather conditioner that our detailer had used. I left and headed for home and in about 5 miles the control for the drivers heated seat started smoking and about 30 seconds later the plastic around the control began to melt and flames were coming out of the area next to the control. I was able to use a fire extinguisher to put the fire out. All of the heated seat components were original and we haven't had any work done to it. …
The contact owns a 2015 Toyota Highlander. The contact stated that while driving on several occasions at various speeds, the infotainment screen would go blank and the system would turn on inadvertently. This issue became more frequent, occurring approximately every 10 seconds. The power steering warning light also illuminated. The vehicle was taken to an auto parts store where a handheld diagnostic machine did not detect any failures or codes. The contact stated that while driving on several occasions at various speeds, the steering wheel became extremely stiff. On one occasion while his daughter was driving and turning the vehicle on a curved road, the vehicle veered into oncoming traffic. The contact stated that she managed to get the vehicle back to the correct side of the road, then stopped and inspected the vehicle. …
On Jan 25, 2022 while sitting in my car... engine running. Smoke filled the inside of the vehicle. Prior to seeing smoke I smelled electrical smell and also my heated seat was warmer than usual. I did not think nothing of it. Smoke definitely came from the knob to turn heated seat on with and also appeared to be coming from the vent. I shut the car off. Thirty to 45min later I turned the car back on. More smoke came but it cleared out with me letting all windows down. Afterwards the panel to control air was completely out along with the clock. The clock came back on later while blinking. I immediately called Toyota Corp. I have case numbers each time I called. I took it ti the Toyota dealership with assistance of Toyota Corp. My car has been at Toyota universe in little falls, nj and they have yet to fully explain what is going on with the defective that occurred in my car. …
The contact owns a 2015 Toyota Highlander. The contact stated while driving 65 MPH, the vehicle stalled, and the steering wheel became difficult to turn. The check engine warning light and several other unknown warning lights were illuminated. The contact was able to pull into a parking lot. The contact was able to restart the vehicle after 45 minutes. The vehicle was taken to an independent mechanic, but the vehicle was not diagnosed or repaired. The dealer was notified of the failure and charged a fee for diagnostic testing. The contact related the failure to NHTSA Campaign Number: 18E107000 (Electrical System, Visibility); however, the VIN was not included. The manufacturer was not notified of the failure. The failure mileage was approximately 193,000.
The contact owns a 2015 Toyota Highlander. The contact stated that the power liftgate consistently failed halfway through while opening and closing the liftgate. The vehicle was not taken to the dealer. The vehicle was not diagnosed or repaired. The contact became aware of information online about Technical Service Bulletin: SB0023/16, NHTSA ID Number: 10134306 (Structure, Electrical System); and associated the failure with the TSB. The manufacturer was made aware of the issue and confirmed that the vehicle was not covered under warranty, TSB, or a recall. The failure mileage was approximately 133,000.
I have a 2015 Toyota Highlander XLE. Last winter I began noticing a burning smell which I believed to be electrical inside the vehicle. I was able to determine it was the driver seat heater and the burning smell continued even with the toggle switch turned off. I stopped at a local Toyota dealership, Koch Toyota, who refused to show me which plug under the seat to unplug to disconnect power. They tried to insist that I drop the car off and let them check it. Due to past negative experiences with that Toyota dealership I refused. I was able to speak to my own mechanic who instructed me to remove the fuse for the driver's seat heater which I did and the smell stopped however the seat heater is not functioning now. Upon recent research online it appears this is a common problem especially in 2015 Toyota Highlanders. …
actuators, yes it's available for inspection The actuators on all the door are going out, they randomly work. It's a safety issue if you needed to exit the car for any emergency or making sure your car is locked and secured. You're at risk due to it simply not working, getting into the car it's a security issue, presents issues for parent(s) with children, children with disabilities, driver/passengers with disablities. When the car is put into reverse, they will not automatically lock as they should. Same when put into park, they do not automatically lock or unlock. Yes, the dealer confirmed the issue. The driver door actuator has been replaced but the other doors need to be replaced now as well. To my knowledge the faulty actuator has not been inspected No warning it just happened. …
When right front pax sits in seat and fastens seatbelt, the airbag indicator correctly says "ON." But after a few minutes, the airbag turns "OFF" and the driver's dash gets an "unfastened seatbelt" warning and a "faulty airbag" warning. All of these occur while the front right pax has remain seated and buckled. If the pax unbuckles and exits the seat, these incorrect warnings all remain the same. The right front pax seat belt buckle has been replaced with no effect. The seat has been recalibrated (seat sensors) with no effect. The wires under the seat have been disconnected, cleaned, and re-connected with no effect. This is a safety issue in that the airbag on that front right side de-activates when a passenger is in that seat. There is a Toyota Recall Campaign for this identical problem, but it does not include my model year (2015). …
We have a 2019 Toyota Highlander. VIN: [redacted] . There are two issues with this vehicle... 1) Our bumper fell down after an uneventful car wash. We didn't hit anything. Reported it to the car wash place (Ollie's Car Wash in Walker, LA) after we noticed it fell. We had to tie-strap it back up because the clips no longer worked right. This happened August 12, 2023. We have pictures of the damage. 2) A second issue is totally separate from the first. This one has to do with the back lifting door. It often gets stuck to where we have to manually force it closed. We have to reset the button often. Sometimes it gets stuck open and sometimes it won't open at all.
Electrical complaints in other Highlander years
Frequently asked questions
How common are electrical problems on the 2015 Toyota Highlander?
NHTSA has 52 complaints about the electrical system of the 2015 Toyota Highlander, 27% of the model year's 192 complaints. The component named most often is wiring › rear compartment/trunk (1 mentions).
Is there a recall for 2015 Toyota Highlander electrical problems?
No. NHTSA lists no electrical system recall for the 2015 Toyota Highlander, though it has 1 recall 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 2015 Toyota Highlander electrical problems start?
Half of the complaints with a recorded mileage happened before about 41,000 miles, and 30% before 25,000 miles.
Is it dangerous?
Owners linked 0 crashes, 4 fires and 2 injuries to electrical system 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.