There are 4 stored owner reports matching the electrical system leading-label group for the 2005 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 4 of 4 matching reports.
Open the full vehicle complaint log (all categories)TL* THE CONTACT OWNS A 2005 MERCURY MOUNTAINEER. WHEN THE VEHICLE WAS STARTED, THE CONTACT HEARD A KNOCKING NOISE FROM THE MIDDLE OF THE DASHBOARD AND COLD AIR WAS BLOWING FROM THE VENTS. THE DEALER DIAGNOSED THAT THE TEMPERATURE BLENDER ACTUATOR FAILED AND NEEDED REPLACEMENT. THIS WAS THE THIRD TIME THE VEHICLE WAS REPAIRED FOR THE SAME FAILURE. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 98,581.
MY HUSBAND WAS DRIVING OUR 2005 MERCURY MOUNTAINEER AND HE WAS GOING LESS THAN 20 MILES PER HOUR ON A MAIN STREET AND GOT IN A ACCIDENT THE WOMAN STOPPED SHORT AND HE REAR ENDED HER. THE CAR TOTALLED UP BUCKLED UP AIR BAGS NEVER INFLATED THEY CAME OUT COMPLETELY DEFLATED. ISSUE WITH THIS CAR ALSO IS THE ELECTRIC DRIVER WINDOW DIES OUT MECHANIC COULD NOT FIGURE OUT BOUGHT NEW MOTORS STILL WOULDNT OPEN ELECTRIC SWITCHES THEY THOUGHT IT WAS FULLY ELECTRONIC THEY WHERE GOING TO RE WIRE VERY EXPENSIBE BUT CAR WAS TOTALLED. CAR HORRIBLE ON GAS ALSO. HAVE PICTURES OF DELATED AIR BAGS BOTH DRIVER AND PASSANGER
MY 2005 MERCURY MOUNTAINEER LOSES POWER FOR NO REASON. THIS IS THE FOURTH TIME THIS HAS HAPPENED. IT WAS BEEN TO THE DEALER MULTIPLE TIMES AND THEY CANNOT FIND A PROBLEM. THERE IS NOTHING TO FORESEE WHEN IT HAPPENS, THE ONLY CONSISTENCY HAS BEEN THAT LUCKILY I HAVE BEEN ON LOCAL ROADS DOING NO MORE THAN 35 MILES PER HOUR OR SO. FIRST BATTERY LIGHT AND SERVICE ENGINE COMES ON AS THE ENGINE STOPS, THEN LOW OIL. THE CAR DOES NOT SEIZE UP, I CAN STEER TO THE SIDE OF THE ROAD. IF I PUT IT BACK IN PARK. TURN THE IGNITION OFF, AND THEN RESTART IT IS FINE. THERE IS CONSIDERABLE LENGTH OF TIME BETWEEN OCCURRENCES (MONTHS IF NOT CLOSE TO A YEAR THIS TIME.) *TR
CRUISE CONTROL DISENGAGES AFTER DRIVING FOR AN EXTENDED PERIOD OF TIME, USUAL A TRIP OVER 90 MINUTES IN LENGTH. IT WORKS FINE UNTIL YOU HAVE TO APPLY BRAKE FOR A CONSTRUCTION ZONE, OR OF RAMP, ETC. WHEN YOU PUSH RESUME NOTHING HAPPENS. TURNING IT OFF AND TRYING TO TURN IT BACK ON STILL DOES NOT RESOLVE THE PROBLEM. AFTER TURNING THE CAR ON AND OFF A FEW TIMES IT WILL START WORKING AGAIN, BUT THAT ISN'T REALLY USEFUL WHILE ON A LONG TRIP. IT FIRST HAPPENED TWO AND A HALF YEARS AGO AND CONTINUES TO HAPPEN. THE DEALERSHIP SAYS THEY CAN'T DUPLICATE THE PROBLEM BUT HAS ONLY TEST DRIVEN FOR 20 MINUTES. *TR
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.