2003 Mercury Sable brakes problems

Consumer was concerned that brake pedal went to the floor intermittently when applied. Vehicle was to dealer on several occasions, and dealer was unable to locate the problem. Afterwards vehicle was involved in a crash because the brake pedal went to the floor while coming onto oncoming traffic. No injuries were reported. Vehicle was taken to the dealer, whoinformed the consumer that the problem was the master cylinder.

ABS activated after going over several "bumps" in a series and brakes applied lightly. Lightly being as when slowing down in traffic for a traffic light and stopping. ABS light did not come on. However, ABS light has subsequently come on. ABS light does not necessarily come on again the next time the vehicle is started. Also the brakes can appear to be fine until the next series of "bumps" is encountered when driving.