One problem related to brake sensor has been reported for the 2004 Ford Mustang. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Ford Mustang based on all problems reported for the 2004 Mustang.
Anti-locking braking system (abs) and traction control failed. The service light went on and I immediately took the car in for repair. The first repair took place between Nov. 11, 2005 and Nov. 18, 2005. The same problem occurred in December 2005. The second repair took place between Dec. 21, 2005 and Dec. 30, 2005. The same systems failed a third time. (Jan. 21, 2006) I am in the process of making another appointment. On the first repair, they replaced part # fmc 2r3z 2c219 CA (control) also fmc 2r3z 2c219 CA (core chg) during the next repair they replaced part # fmc f7zz 2c204 ab (sensor asy). During these repairs, the down time on my vehicle has been a total of 4 days and counting. The last incident on Jan. 21, 2006 was frightening. The abs system was engaging during normal braking. (stopping at a light) I could feel the system turning on and off. I felt as if the car might not stop. I turned around and went home. I feel the car is not safe to drive. I do not have any of the original parts for inspection.