2022 Toyota Highlander Electrical System Problems

Vehicle: 2022 Toyota Highlander Limited Mileage at failure: ~60,000 miles The driver seat began moving rearward without any driver input while the vehicle was being driven. The movement was intermittent and occurred multiple times over several days. In one incident, the seat moved rearward while my wife was driving, causing her to lose proper reach to the brake pedal and nearly lose control of the vehicle. The seat would sometimes move to the full rear position and continue attempting to move past the mechanical stop. The problem also occurred during vehicle startup and shutdown cycles. This condition creates a significant safety risk because the driver’s seating position can change unexpectedly while driving. In attempting to mitigate the problem, I tried to disable the power seat by removing the fuse. However, the power seat fuses on this vehicle are not clearly labeled and are mounted on the side of the interior junction block under the dash, making them inaccessible to the driver without removing interior panels. As a result, the malfunctioning system could not be quickly disabled. The vehicle required replacement of the driver seat control/track assembly at a cost of approximately $1,600. Uncommanded movement of the driver seat while driving appears to be a safety-related defect and should be investigated for potential recall or service campaign

Throttle plate iced up in cold weather, causing computer to put the car in limp mode, creating a dangerous situation. Toyota had a TSB solution for this in 2023, but did not make the software update available until my vehicle failed.

The entire head unit in the center of the front console went crazy and started going blank, glitching out, and basically made it impossible to use any of the features associated with that screen unit. The 2022 Toyota Highlander's head unit controls infotainment (radio, streaming, navigation, phone) and integrates with vehicle settings for climate (auto AC, seat heaters/ventilators), lighting, door locks, and driver-assist features like Road Sign Assist and Parking Support Brake, with over-the-air updates available for connected models. It manages multimedia, Bluetooth, Apple CarPlay, Android Auto, Wi-Fi, and vehicle alerts, offering deep customization for audio, display, and connectivity. We promptly took the car into the Toyota Dealer and they determined it was a bad head unit and I had to pick up the car and they made us drive the car for about 1 1/2 weeks broken, while the part was in transit. After the part arrived, we scheduled visit for that part replacement. They later called and said that it was causing the same issues and had to do a further diagnostic and determined that the integragation control sub assembly computer (the cpu for the head unit?) was actually the bad part. The 2nd part was ordered and installed, and ultimately repaired the issue. We had limited control over the heater and keeping the ice off the windows and other issues with no navigation and other systems during this 1 1/2 week period. This is also the same screen that gives us the backup camera, and the 360 degrees camera views. Wow, not happy that such a major part failed with the car being so new. We bought the car brand new with just a few miles on it, and have bought every service and insurance package that Toyota offered when we purchased the car and have kept and maintained the car in excellent shape doing all maintenance exactly on schedule.

When turning on the heated steering wheel and about 5-10 minutes, it seems there is smoke coming from the steering wheel leather and it’s very hot that almost burnt my hand and forced me to take my left hand off. I immediately turned the heated steering wheel and stopped. There is a burning spot left on the steering wheel also. The heating option still can be enabled and the same situation repeats (like no fuse was broken)

The screen is going out. The back tailgate hangs up and doesn’t go down.

LIFTGATE MALFUNCTION

The contact owns a 2022 Toyota Highlander. The contact stated that while driving 70 MPH in the fast lane, the steering wheel failed to respond as needed while attempting to turn to the left or the right. Additionally, the brakes became inoperable and the vehicle decelerated. The contact stated that several unknown warning lights were illuminated. The contact was able to veer to the shoulder, and the vehicle shut off. The contact called Roadside Assistance and was informed that the battery needed to be replaced. The vehicle was taken to an independent mechanic, who informed the contact that the failure was due to the engine. The contact called the local dealer, but the vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 17,781.

Vehicle Issue Description (Rear Liftgate): The rear power liftgate intermittently fails to operate and presents a safety concern. The liftgate often will not open at all. At other times, it opens only partially (approximately one-quarter of the way) and then stops. When this occurs, the liftgate frequently will not close properly and sometimes fails to latch securely. This issue has been ongoing for approximately two years and has progressively worsened. It has now reached the point where the rear liftgate is no longer usable. If the liftgate does not open in an emergency, occupants may be unable to exit the vehicle through the rear, which could be dangerous in the event of an accident. Additionally, when the liftgate fails to latch securely, there is a risk it could open while driving, potentially causing cargo loss, reduced visibility, or allowing exhaust fumes to enter the cabin. Numerous Toyota Highlander owners report the same issue on public forums such as Reddit, indicating this is a widespread and known problem. According to these reports, dealerships are commonly diagnosing the failure as a failed liftgate strut, with quoted repair costs of approximately $1,500. I reported this issue to Toyota directly today and was told that Toyota does not issue recalls and that concerns should be reported to NHTSA. I am frustrated that this appears to be a known issue that has existed for years without corrective action. Component/System Failed: Rear power liftgate system (including latch and power operation components). Available for inspection upon request. Safety Risk: Risk of liftgate opening while driving and inability to exit through the rear in an emergency, potentially trapping occupants. Dealer Confirmation: Not formally confirmed. A reset was recommended during a prior service visit, which worked temporarily for one day. Resets no longer resolve the issue. Inspected by Others: No. Warnings Prior to Failure: No warning lamps or messages.

The breaking system doesn’t take effect in speed and turn and when you leave the acceleration and the speed increase and loose control . Also the electrical system is damage not with seven month of brand new highlander hybrid . The rear cross traffic control and blind spot warning are coming . These is a serious electrical problem under 11,000 miles brand new vechile

While driving on the highway the entire dashboard warning system came on all the ADAS and messages saying braking failure to loss of control. This vehicle is not even three months old and is a platinum AWD vehicle fully loaded version. Toyota Dealership never mentions or stated this vehicle had any issues, even today they seem not to know what caused the vehicle to underperform. This is dangerous and this vehicle going at 65 MPH and unable to stop is a real danger to the occupants and others. They say its safe to drive, I disagree for the safety of all indivduals on the roadways.

The contact owns a 2022 Toyota Highlander. The contact stated while driving 35-40 MPH and attempting to accelerate to enter the highway, the accelerator pedal was depressed; however, the vehicle responded sluggishly. The vehicle emitted abnormal sounds as though the transmission was in neutral. The contact depressed the accelerator pedal all the way to the floorboard and the vehicle responded as intended. There were no warning lights illuminated. The contact was able to continue driving. Additionally, the contact stated that while driving 40 MPH, the brake pedal was depressed but hesitated to respond, causing 20 feet stopping distance delay. The contact stated that the failure mainly occurred in wet conditions, snowy conditions while driving approximately 60 MPH. The vehicle was taken to the dealer and test driven. The dealer informed the contact that though the vehicle was sluggish, it was not concerning. However, the failure reoccurred increasingly. The vehicle was taken to the dealer for a second and third time. The dealer test drove the vehicle and informed the contact that they could not duplicate the failure. Additionally, the contact stated that there was a strong burning wire coating smell coming from grill radiator while driving approximately 60 MPH. The contact stated that there was a metallic rotating sound coming from the air conditioning vent while using the heat. The contact stated that the sound persisted after turning off the vehicle. The contact also stated that there was an abnormal sound coming from the rear passenger’s side subframe while reversing. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure and a case was opened. The contact was awaiting a call back. The failure mileage was approximately 1,800.