Two problems related to brake hoses, lines/piping, and fittings have been reported for the 2003 Ford Focus. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Ford Focus based on all problems reported for the 2003 Focus.
Manufacturing defect places the plastic inner fender against the front left brake line. The plastic inner fender is allowed to rub a hole in the front left brake line. The front left brake line leaked due to wear caused by the plastic inner fender. Loss of brakes due to a hole in the front left brake line.
Leaking brake line. The leak was caused by the front left plastic inner fender rubbing against the brake line. I have digital pictures available.