Two problems related to brake master cylinder have been reported for the 2003 Ford F-250. The most recently reported issues are listed below.
I was traveling on the highway during five o clock traffic at a speed of approximately 40 mph when suddenly the vehicles in front of me began crashing into each other. I pressed my foot on the brake pedal to stop and suddenly the pedal went straight to the floor and I smashed into the back of the car in front of me. Today the auto shop handling the repairs called me in to look at what happened. The master cylinder broke completely free from the booster. The metal brackets broke in half and separated causing the lose of brakes and the accident. I have photos of the master cylinder blown away from the booster.
2003 Ford F-250 super duty. Consumer states vehicle caused an accident when the brake pedal went to the floor while approaching stopped cars the consumer stated the vehicle was ordered with abs and a dual master cylinder, so if the front or rear brakes failed, he would at least have two wheel brakes to stop and lock up completely. After the truck was picked up and taken to a garage, the tow truck driver found parts lying on his truck bed. They were from a switch on the end of the master cylinder. The housing for the switch rotted away allowing the switch to fall apart. Without the switch blocking the hole in the end of the master cylinder, there were no brakes. The consumer believed there was a flaw in the system, because it should have at least allowed him to have two wheel brakes. The consumer stated with all the safety built into the brake system, how did one switch wipe out the entire brake system when it failed.