My car all of a sudden stopped on it's own while driving on the expressway. i didn't press the brake pedal or anything. i had to get out of my car in the middle of traffic & wait on a tow. the mechanic shop said that it was very dangerous for the car to do that.
In december of 2016 i was driving my car out of my driveway, and the car would not stop when brakes were applied. this occurred over the course of 3 days, and i took the car to the dealership where it has a service history record. they indicated that the brake booster and the master cylinder were both leaking, and they were going to be replaced. the car was released to me approximately 1 week later. upon driving the car the next morning at my home the same problem continued to happen. i took the car back to the dealership where they kept the car for 1 week and drove it 300 miles, and they said the car has no problem. i determined that this problem occurs in cold weather. they asked me to come and get the car. in approximately december of 2017 i was backing out of my driveway and i could not stop the car and rolled down the hill into a ditch. the car would not stop. i put on the emergency brake and was able to get the car back into the driveway. over the next two days, as a test i would start the car to see if i could back the car out of the driveway, and again no brakes to stop the car. i called the dealership and took the car back, where the indicated that the brake booster was leaking and needed to be repaired. they repaired it and a few days later asked me to pick up the car. when picking up the car at the dealership, i placed my foot on the brake to start the car, and the car would not start. the senior service technician came out to evaluate and it took him 4 attempts while vigorously stomping on the brake to start the car. the car was left at the dealership for further evaluation. they claimed a malfunction with the brake switch, and kept the car for several days. now i have received the car back, and i am still having the same problem. i backed out of my driveway on 01/29/2018, and the car would not come to a complete stop.