There are 8 stored owner reports matching the brakes leading-label group for the 2003 Mercury Mountaineer in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 8 of 8 matching reports.
Open the full vehicle complaint log (all categories)MY ABS BRAKE LIGHT POPS ON AND OFF CONSTANTLY. *TR
TL* THE CONTACT OWNS A 2003 MERCURY MOUNTAINEER. THE CONTACT STATED THAT WHILE DRIVING 45 MPH, HE APPLIED THE BRAKES AND THE BRAKE PEDAL DEPRESSED TO THE FLOOR. THE VEHICLE COASTED TO A STOP AND WAS TOWED TO AN INDEPENDENT REPAIR SHOP. THE CONTACT WAS INFORMED THAT THE BRAKE LINES RUPTURED AND THE VEHICLE LOST ALL BRAKE FLUID. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 79,000.
TL*THE CONTACT OWNS A 2003 MERCURY MOUNTAINEER. THE CONTACT STATED THE BRAKE AND ACCELERATOR PEDALS FAILED SIMULTANEOUSLY. WHILE DRIVING 55 MPH WITH THE BRAKE PEDAL ENGAGED THE PEDAL EXTENDED TO THE FLOOR BOARD. SIMULTANEOUSLY, THE ACCELERATOR PEDAL AND THE BRAKE PEDAL WAS STUCK IN THE DOWN POSITION. AS THE VEHICLE TRIED TO SLOW DOWN THE BRAKES WERE ON FIRE. THE CONTACT THRUST THE GEAR INTO PARK, PULLED THE EMERGENCY BRAKE WHICH FAILED TO FUNCTION, TURNED THE ENGINE OFF AND WAS ABLE TO EXIT FROM THE VEHICLE WITHOUT BEING INJURED. THE FIRE WAS EXTINGUISHED. THE FIRE DEPARTMENT FILED A REPORT. THE VEHICLE WAS TOWED TO AN AUTO REPAIR SHOP. THE DEALER WAS NOT NOTIFIED OF THE FAILURE. THE MANUFACTURER WAS STATED THERE WAS NO RECALL AND OFFERED NO ASSISTANCE. THE FAILURE MILEAGE WAS 112,000.
AFTER SPENDING HOURS TRYING TO REMOVE BACK DISC-DRUMS FOUND THAT THE EBRAKE SHOES HAD RELEASED FROM THE LININGS ON BOTH SIDES REAR OF A 2003 MERCURY MOUNTAINEER THE ADHESIVE ON THE SHOES HAD RELEASED FROM THE SHOE. *TR
DT: CONTACT STATES WHILE DRIVING 2003 MERCURY MOUNTAINEER SHE WAS TURNING AND PRESSED ON THE BRAKES THE PEDAL FELL OFF. THE SERVICE DEALER STATED THE REASON THIS HAPPENED WAS BECAUSE THE BRACKET BROKE. *AK THE BRAKE PEDAL FELL OFF WHEN PRESSED BECAUSE A SELF LOCKING BOLT WAS NEVER INSTALLED DURING ASSEMBLY. *NM
THE ROTORS WERE PITTED AND RUSTED ON THE CONSUMERS 2003 MERCURY MOUNTAINEER. *JB THE BRAKES WOULD TAKE TOO LONG TO WORK. THE FRONT PADS AND REAR PADS WERE WORN, REPLACED AND RESURFACED. *SC *JB
THE PROBLEM PERSISTED AND CONCERN WITH STALLED VEHICLE, SERVICED AND PROBLEM STILL CONTINUE. *BF THESE PROBLEMS ELEVATED TO VEHICLE STALLING, THE ALTERNATOR WAS REPLACED, THERE WERE CONTINUOUS OCCURRENCES OF THE BATTERY FAIL/CHECK ENGINE INDICATOR LIGHT, VIBRATION WHEN BRAKING, AND THE TORQUE CONVERTER LOCKED. THE CONSUMER REQUESTED A NEW LEASE AND OR EARLY TERMINATION OF THE LEASE. *SC
WHEN APPLYING THE BRAKES, SOMETIME THE DRIVERS FOOT HIT THE GAS PEDAL, AND CAUSED A LONGER STOPPING DISTANCE. THE PEDALS WERE TOO CLOSE AND ON THE SAME HORIZONTAL PLAIN WHEN THE BRAKES WERE DEPRESSED. *AK *SCC *JB
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.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Apr 28, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.