PCS brake has enormously engaged twice. 1. small branch fell off tree on a dirt road. brakes engaged and should not have and almost caused vehicle to slide off a 1000 foot cliff. 2. auto braked with my dog was in car and broke dogs' leg and cost a 2,000 dollar vet bill. brakes where not needed i could have easily just did a slight steering adjustment to avoid collusion. the braking prevented that and almost was also almost rearended overall, the autobrake can be disabled with a lot of work on various menus. but comes on when the car is restarted. I do this every time i restart the car. I suspect a glitch or a low voltage caused it to come back on. Also trying to always remember to do it is difficult to do. I consider this auto brake to be a huge safety risk and could cause loss of life. I am so scared by this and afraid to dive the car now. may have to take a total loss on the car I just bought. Toyota dealers said they cannot reprogram the car to prevent this serious safety risk