2022 Toyota 4RUNNER

Suddenly had difficult time stopping the vehicle without "pumping" the brakes. Brake pedal went to the floor, and car would not hold stopped. There were no warning lamps during the 400 miles of driving from western NY to Michigan for a Holiday with family. Had this happened as I was waiting in line on the downhill side of the Blue Water Bridge in Michigan, it would have been quite difficult to keep in line, not touching the car in front of us. We felt lucky to have discovered the problem while going to run an errand later. We saw no external leaks to the brake system (no fluid leaking) while trying to investigate what could be happening. The problem was reported to me as a leak in the brake master cylinder which was replaced under warranty at a Toyota dealer in Grand Blanc MI. It took two weeks to get the vehicle repaired (which presented other challenges to us to deal with, as we were only visiting Michigan at the time). The vehicle had 12,600 miles on it at the time that the brakes stopped holding.

Driving home today, I felt that the brake was not performing properly. When I would stop at stop signs, slow down for traffic, or stop at red lights, the brake pedal felt spongey and the vehicle would not come to a complete stop. As I would step on the brake pedal, the vehicle would slow down, but continue to roll, while the pedal would continue to go farther and farther down until I could not press it any farther. When I made it home, I parked it in the garage, and even with the vehicle turned off, the brake pedal goes all the way to the floor.

On numerous occasions, while driving in a straight line with our adaptive cruise control on, our 2022 Toyota 4Runner will automatically actuate the vehicle's brakes when approaching a slower or stationary vehicle that is either to the left or right, but not directly in front of our vehicle. This sudden speed reduction has almost caused any following vehicles to almost collide with the back of our 4Runner. It has happened to us at speeds between 30 MPH and 65 MPH. When it happens, one has to quickly tap the brakes to deactivate the adaptive cruise control then get on the accelerator pedal to avoid a collision with any following vehicle. We have taken our 4Runner into two separate Toyota dealerships on three separate occasions to have this problem diagnosed and repaired. The first dealership told us repeatedly that there is no issue. The second dealership pulled data from our vehicle and made an adjustment to the 4Runner's forward camera system. Unfortunately, the day after this adjustment was made our 4Runner irrationally applied the brakes when we were driving 35 MPH on a straight road with no other vehicle in front of us. The problem is not fixed. We are now waiting for a response from Toyota Corporate.