One problem related to brake master cylinder has been reported for the 2004 Ford Focus. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Ford Focus based on all problems reported for the 2004 Focus.
One month ago I needed to have brakes replaced, and assumed that because the light came on this was an indicator. After brakes were replaced, brake fluid was still disappearing. I also found a drip on my pedal from somewhere under the dash, after my foot slipped on the clutch from slick brake fluid, and nearly wrecked my car on I-70 when I needed to shift into a lower gear after my foot slid right off the pedal. Turns out the master cylinder is leaking. My car is only 3. 5 years old, and only has 41,000 miles on it total. I have taken it to mechanic, it is a Ford manufactured only part, and with parts and labor is costing me $450+ to repair this on a relatively new car not even paid for yet. Still not a safe situation when you can't keep your foot on the pedal.