Three problems related to assist have been reported for the 2021 Toyota Highlander. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2021 Toyota Highlander based on all problems reported for the 2021 Highlander.
2021 Toyota Highlander ua80 transmission failed at 100,000 miles. Codes p2808, p0741. Matches Toyota TSB-0160-18 and t-sb-0008-21. Dealer alexander Toyota and tms brand engagement denied goodwill. Tms rep stated "tsbs don't matter" despite pending class action pallaya v Toyota, case 2:25-cv-10458, which cites these tsbs as proof Toyota knew of defect. Toyota refusing to honor documented defect. Transmission slip/loss of power is safety issue. Request investigation.
The steering technology in this vehicle reads lines on the road that are not correct or valid lanes and almost caused several accidents during the 2 years I had the vehicle. Luckily, I was paying attention and had to jerk the wheel to the correct lane but the steering wheel will force itself to the other false lane. This is extremely dangerous and this is a huge safety issue.
The lane assist will not stay turned off, even when it is done manually each time I get in the car. The steering pulls me back when I'm trying to change lanes, making it unsafe.