One problem related to brake master cylinder has 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.
After a two-week vacation, I was going to drive my 2003 Ford Focus to work. As I was backing out of the garage, I noticed that the brakes were extremely soft. The repair shop that diagnosed and repaired the problem told me that I had a total failure of the master cylinder which controls both the clutch and brakes. They also said that this is the second incident that they were aware of. Repair included a new master cylinder and replacement brake fluid. I do not know if it was coincidence or not, but they also discovered that my rear wheel cylinders had also "exploded. " repair required cylinder and disc replacement. Old parts have been retained.