2019 Toyota Highlander: adaptive cruise control problems

Filed May 11, 2026 · Acceleration, Driver assistance · 80,000 miles · IL

The contact owns a 2019 Toyota Highlander. The contact stated that while driving approximately 60 MPH under a local under path the vehicles the braking system suddenly activated causing the vehicle to come to a complete stop. Previously the while driving at the same location the vehicle suddenly reduced speeds. The contact indicated that each time the failure had occurred the cruise control feature was activated. The cause of the failure was not determined. The manufacturer and local dealer were not yet contacted. The failure mileage was 80,000.

Filed Dec 2, 2025 · Driver assistance · NM

Adaptive cruise control issue and transmission issue transmission is whining. Vehicle taken to the dealer and I am told nothing is wrong with the vehicle.

Filed Feb 14, 2024 · Driver assistance · MD

I was using the adaptive cruise control on I-68 in Western Maryland. I was in the fast lane (on the far left of three uphill lanes). A dump truck was in the center lane going well below the speed limit. The road curved to the left at the point where I got up to the dump truck. There was no one in front of me in my outside lane. My car sensed the presence and speed of the dump truck and slowed me abruptly. There was considerable risk to me and to the driver of a white pick-up truck that was behind me, and who was also driving at passing speed. We were both going approximately 75 mph when my car slowed--a slowing that does not display brake lights. The cruise control has not been inspected. It is the default setting on ignition. I routinely disable it, opting for regular cruise, each time I use it, but the potential is always there for me and for other owners. If there was any sort of warning (I don't remember) it would have been inadequate to prevent an accident. The alertness of the pick-up truck driver saved us both a collision.

Filed Jan 3, 2023 · Driver assistance, Electrical · TX

The door locks will not unlock or lock. Had to replace two so far and now the other side is doing the same. Pre collision, Lane departure, cruise control and traction have malfunction. Unknown as to why at this moment.

Filed Mar 13, 2021 · Acceleration, Driver assistance · 6,000 miles · MA

A month ago, we were driving on the highway through snow showers up to nh to go skiing, with our nifty adaptive cruise control on, when I realized that we were accelerating into the car in front of us. I assumed that the front sensor was covered in slush, took off the cruise control and drove manually. Only about 5 minutes later did the dashboard alert notify me that the front sensor wasn't working. Brought it into the dealer. They couldn't find anything wrong. Here's the problem: the car says "trust me. If you use my cool safety systems, I'll keep you from hitting the car in front of you...and should something disable the sensor that carries out this function, I'll let you know, so that you won't depend on me." but that's not true. And, a driver who assumed that the car was keeping its promise, as it does most all the time--might not have realized that it wasn't until they hit the car in front of them.