2020 Toyota Highlander: sudden unintended acceleration

Filed Oct 28, 2023 · Brakes · VA

On more than 50 occasions while coming to a stop or slowing down I have experienced a surge forward while applying the brakes. It has happened at stop signs, stop lights, going downhill. I cannot duplicate on demand. Several times it has surged me past a stop sign/stop light while I still had my foot on the brake. Also, when the surge happens, I have to push harder on the brake pedal to stop the vehicle. I took it to the dealership on 9/2023 and was told it was not a problem that could be replicated and it has happened several times since then.

Filed Sep 20, 2023 · Body, Engine · WI

About once or twice a week as I'm slowly braking to make a turn or stop, the car will surge forward. I have to depress the brake harder, and it does stop or keep slowing. I'm very concerned that if this happens as I'm stopping at a cross walk, someone could be hurt. I took it to the dealer who couldn't replicate it, so said it wasn't a safety issue. There are lots of forums that describe this with highlanders. My partner can feel it happen too. I'm not sure if it's the braking system or engine. My guess is engine because it seems to be a power surge. It's inconsistent, and happens in all kinds of weather, hot/cold, dry/wet. No warning lights, or messages. Happens a lot, but I'm using the example of earlier this week. You're welcome to inspect if you want. It is a hybrid and one of my friends said it might be switching systems, but our other car is also a hybrid and doesn't have anything like this happening.

Filed Sep 11, 2023 · Brakes · SD

On several occasions while coming to a stop or slowing down I have experienced a surge forward while applying the brakes. It has happened at stop signs, stop lights, going downhill. I cannot duplicate on demand. Several times it has surged me past a stop sign while I still had my foot on the brake. Also, when the surge happens, I have to push harder on the brake pedal to stop the vehicle. I have had the hub replaced as well as the wheel censer and I still have the problem. I took it to the dealership on 8/15/22 and it has happened several times since then.

Filed May 18, 2023 · Acceleration · 36,009 miles · MA

The contact owns a 2020 Toyota Highlander. The contact stated that after slowing down to come to a stop, the vehicle would inadvertently surged forward. There were no warning lights illuminated. The vehicle was taken to the dealer who was unable to determine the cause of the failure. The vehicle had not been repaired. The failure had since become more frequent. The manufacturer was made aware of the failure. The approximate failure mileage is 36,009.

Filed Jan 18, 2022 · Brakes, Driver assistance · 21,000 miles · MD

The contact owns a 2020 Toyota Highlander. The contact stated that upon the depression of the brake pedal, the vehicle would intermittently surge forward without warning. The contact stated that he would shift the vehicle into neutral to stop the vehicle from surging. The contact also stated that the blind spot monitor's unavailable warning message would intermittently appear on the instrument panel. The contact had taken the vehicle to Bayside Toyota and Waldorf Toyota and each dealer was unable to duplicate or diagnose the cause of the failure. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 21,000.