There are 4 owner-reported fuel system complaints for the 2004 Ford Mustangin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
NEVER KNOW WHEN CAR IS FULLY GAS UP ALWAYS PUT GAS IN AT 1/4 TO 1/2 TANK, WILL OVERFILL IF NOT VERY CAREFULLY SO REALLY JUST PUT NO MORE THAN 10 TO 15 DALLAS NEVER SHOWS FULL. DO NOT WANT TO OVERFLOW ON ME FOR ONE TWO IT'S BAD FOR MY BABY #1 MUSTANG
CAR STALLING WHILE IDLING AND DECELERATING. *TR
GAS PEDAL STUCK WITH THROTTLE OPEN. CARPET (NOT THE FLOOR MAT, BUT THE CARPET) HAD COME UNHOOKED FROM ITS HOLD DOWN SYSTEM AND WAS JAMMED UNDER THE THROTTLE KEEPING IT OPEN.
WHILE DRIVING SERVICE ENGINE LIGHT CAME ON. THE GEAR SHIFT LEVER VIBRATED, ALL THE FLUID LEVERS WENT TO EMPTY, AND VEHICLE COASTED TO A STOP. VEHICLE WAS SERVICED TWICE BY THE DEALERSHIP FOR THIS PROBLEM IN WHICH THE CLAMP WAS REPLACED. HOWEVER, PROBLEM RECURRED.*AK
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 25, 2026