Two problems related to brake master cylinder have been reported for the 2003 Ford F-150. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Ford F-150 based on all problems reported for the 2003 F-150.
Brake pedal became spongy at first but then went clear to the floor when attempting to stop. The vehicle stops but with very long reaction time. The master cylinder was replaced with a new unit. . . But the problem persisted. Abs unit was then replaced with salvage unit. . . Problem still persists.
While driving at 70 mph and trying to avoid a merging vehicle consumer attempted to slow down the vehicle but brakes were not responding properly. The brake pedal went to the floor, and the emergency brakes were employed to stop the vehicle. The dealer has possession of the vehicle awaiting an examination. The service dealer determined that the master cylinder failed and caused the complete brake failure.