NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
117 reports60,650 miles · Sep 20, 2009
Power TrainCrashInjury
MY CAR HAS HAD A CONTINUING PROBLEM WITH THE TRANSMISSION. IT SHIFTS ROUGHLY AND LURCHES WHEN BEGINNING TO MOVE. FOR EXAMPLE, WHEN STOPPED AT A STOPLIGHT, AND THEN BEGINNING TO DRIVE, IT WILL LURCH, JOLTING THE PASSENGERS. OUR DRIVEWAY IS SLOPED TOWARD THE STREET. WHEN I PARK THE CAR, I ALWAYS SET THE EMERGENCY BRAKE AS WELL…
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MY CAR HAS HAD A CONTINUING PROBLEM WITH THE TRANSMISSION. IT SHIFTS ROUGHLY AND LURCHES WHEN BEGINNING TO MOVE. FOR EXAMPLE, WHEN STOPPED AT A STOPLIGHT, AND THEN BEGINNING TO DRIVE, IT WILL LURCH, JOLTING THE PASSENGERS. OUR DRIVEWAY IS SLOPED TOWARD THE STREET. WHEN I PARK THE CAR, I ALWAYS SET THE EMERGENCY BRAKE AS WELL. THE CAR ALWAYS ROLLS A FEW INCHES BEFORE THE BRAKES LOCK, EVEN THOUGH IT IS STOPPED AND IN PARK. ON SEP. 4, 2009, MY MOTHER BORROWED MY CAR TO GO TO LUNCH. SHE COULDN'T FIND THE EMERGENCY BRAKE RELEASE. SHE PUT THE CAR IN PARK AND GOT OUT TO LOCATE THE EMERGENCY BRAKE. SHE FOUND IT AND RELEASED IT. THE CAR POPPED INTO REVERSE AND ROLLED BACKWARDS TO THE STREET. THE DOOR KNOCKED MY MOTHER DOWN AND SHE HIT HER HEAD HARD ENOUGH TO SUSTAIN A CLOSED HEAD INJURY WITH MINOR BLEEDING IN HER BRAIN. THE CAR ROLLED ACROSS THE STREET, OVER THE CURB AND HIT A NEIGHBOR'S POPLAR TREE. THE ENTIRE TAILGATE WAS DESTROYED, THERE WAS SOME INTERIOR DAMAGE AND THE FRAME WAS WARPED. THE TAILGATE HAD TO BE REPLACED, THE BUMPER AND TRAILER HITCH HAD TO BE REPAIRED AND THE FRAME STRAIGHTENED. MY MOTHER WAS IN HOSPITAL OVERNIGHT AND HAD TO HAVE TWO CT-SCANS. SHE STILL HAS HEADACHES AND TRANSIENT DIZZINESS. WE ARE JUST FORTUNATE THE CAR DIDN'T RUN HER OVER, HIT A PEDESTRIAN (THERE ARE A LOT OF WALKERS IN OUR NEIGHBORHOOD), HIT A CAR OR A NEIGHBOR'S HOUSE. *TR
NHTSA ODI #10284646
50,000 miles · May 28, 2009
Power TrainCrash
2006 MERCURY MOUNTAINEER SLIPPED OUT OF PARKED IN DRIVEWAY AND HIT MOTHER INLAWS 2005 GMC ENVOY. THIS IS ONE OF A HAND FULL OF TIMES IT HAS SLIPPED OFF PARK. TOOK IT TO THE DEALERSHIP 3 TIMES AND NOTHING, NOW I AM FIGHTING WITH GRAND LEDGE FORD, GRAND LEDGE, MI TO GET IT FIX OR REPLACE THE TRANSMISSION BEFORE SOMEONE GET SERIOUS…
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2006 MERCURY MOUNTAINEER SLIPPED OUT OF PARKED IN DRIVEWAY AND HIT MOTHER INLAWS 2005 GMC ENVOY. THIS IS ONE OF A HAND FULL OF TIMES IT HAS SLIPPED OFF PARK. TOOK IT TO THE DEALERSHIP 3 TIMES AND NOTHING, NOW I AM FIGHTING WITH GRAND LEDGE FORD, GRAND LEDGE, MI TO GET IT FIX OR REPLACE THE TRANSMISSION BEFORE SOMEONE GET SERIOUSLY HURT OR EVEN DIES. THIS IS A VERY SCARY SITUATION AND NEEDS TO BE RECALLED AS SOON AS POSSIBLE. *TR
NHTSA ODI #10270196
71,000 miles · May 26, 2009
Engine And Engine CoolingPower Train
HAD TO REPLACE TWO RADIATORS WITHIN 30,000 MILES OF REPLACEMENT. EXACTLY HOW MANY COMPLAINTS, OR SHOULD I SAY DEATHS (?) ARE NEEDED TO TRIGGER AN INVESTIGATION OF A COMPANY GLADLY RECEIVING ASSISTANCE WHILE OUTPUTTING INFERIOR VEHICLES. NO VEHICLE MANUFACTURED IN 2006 SHOULD NEED THREE NEW RADIATORS WITHIN 3 YEAR AND 70K MILES. …
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HAD TO REPLACE TWO RADIATORS WITHIN 30,000 MILES OF REPLACEMENT. EXACTLY HOW MANY COMPLAINTS, OR SHOULD I SAY DEATHS (?) ARE NEEDED TO TRIGGER AN INVESTIGATION OF A COMPANY GLADLY RECEIVING ASSISTANCE WHILE OUTPUTTING INFERIOR VEHICLES. NO VEHICLE MANUFACTURED IN 2006 SHOULD NEED THREE NEW RADIATORS WITHIN 3 YEAR AND 70K MILES. STOP LETTING FORD OFF THE HOOK AND GET SERIOUS ABOUT GETTING TO THE BOTTOM OF THEIR ISSUES. JUST DO A SEARCH ON 2006 MERCURY MOUNTAINEER AND YOU WILL CLEARLY SEE THERE ARE ISSUES WITH THE COOLING AS WELL AS THE AUTOMATIC TRANSMISSION. IN FACT, OUR MODEL HAS THE SAME ISSUE THAT OTHERS HAVE REPORTED WITH THE AUTOMATIC TRANSMISSION AND IT WILL SOMETIMES NO MOVES GEARS, SLIP A GEAR, AND TUG LIKE IT IS PULLING OUT OF MUD AT A STOP LIGHT. OPEN A FULL BLOWN INVESTIGATION INTO THEIR LACK OF QUALITY CONTROL AND THE LACK OF PROFESSIONALISM ON THE PART OF THE DEALERSHIPS FOR NOT REPORTING THIS TO CORPORATE. *TR
NHTSA ODI #10269936
45,400 miles · May 9, 2009
Structure
I HAVE A 2006 MERCURY MOUNTAINEER WITH AUTO RUNNING BOARDS. THE RUNNING BOARDS SEEM TO HAVE A MIND OF THEIR OWN. BOTH HAVE BEEN REPLACED BY THE DEALER, THE LATEST WAS 5-5-09. TODAY WHEN OUR DAUGHTER WAS ENTERING THE PASSENGER SIDE THE RUNNING BOARD OPENED UP LIKE IT WAS SUPPOSED TO BUT CLOSED AT ONCE ONTO OUR DAUGHTER FOOT. THE …
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I HAVE A 2006 MERCURY MOUNTAINEER WITH AUTO RUNNING BOARDS. THE RUNNING BOARDS SEEM TO HAVE A MIND OF THEIR OWN. BOTH HAVE BEEN REPLACED BY THE DEALER, THE LATEST WAS 5-5-09. TODAY WHEN OUR DAUGHTER WAS ENTERING THE PASSENGER SIDE THE RUNNING BOARD OPENED UP LIKE IT WAS SUPPOSED TO BUT CLOSED AT ONCE ONTO OUR DAUGHTER FOOT. THE PASSENGER DOOR WAS STILL OPEN WHEN IT CLOSED AND THE RUNNING BOARD WOULD NOT RETRACT. WE WERE VERY LUCKY NOT TO HAVE SUFFERED SERIOUS INJURY. IF SHE HAD BEEN 7 INSTEAD OF 15 I WOULD HATE TO THINK WHAT MIGHT HAVE HAPPENED. *TR
NHTSA ODI #10268300
Mileage unknown · Mar 17, 2009
Engine And Engine Cooling
THE EXHAUST SYSTEM FROM THE CATALYTIC CONVERTER DISENGAGED. *TR
NHTSA ODI #10262098
Mileage unknown · Mar 7, 2009
Power TrainTires
TWO COMPLAINTS. 1) TRANSMISSION DOWNSHIFTS HARD WHEN SLOWING, SUCH AS FOR A STOP SIGN. MERCURY SAYS IT IS A SOFTWARE PROBLEM. THEY ARE AWARE OF THE PROBLEM BUT WON'T FIX IT UNDER THE EXTENDED WARRANTY. MY VEHICLE HAS 37,700 MILES. 2) EXTREME WIRE WEAR. IT CAME WITH MICHLIN TIRES AND I HAVE GOTTEN FAR LESS THAN 20,000 MILES …
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TWO COMPLAINTS. 1) TRANSMISSION DOWNSHIFTS HARD WHEN SLOWING, SUCH AS FOR A STOP SIGN. MERCURY SAYS IT IS A SOFTWARE PROBLEM. THEY ARE AWARE OF THE PROBLEM BUT WON'T FIX IT UNDER THE EXTENDED WARRANTY. MY VEHICLE HAS 37,700 MILES. 2) EXTREME WIRE WEAR. IT CAME WITH MICHLIN TIRES AND I HAVE GOTTEN FAR LESS THAN 20,000 MILES OUT OF THEM. I AM NOW REPLACING WITH BRIDGESTONE. I DON'T KNOW IF IT IS THE TIRE OR SOMETHING DEFECTIVE WITH THE VEHICLE. THE DEALERSHIP LIED TO ME WHEN I TOOK IT IN FOR THEM TO CHECK. THE MICHLINS ARE WEARING IN THE CENTER OF THE TREAD AND THE DEALERSHIP TOLD ME THAT IT WAS BECAUSE I HAD 45 POUNDS IN THE TIRES. I AM VERY CONCERNED ABOUT ALL ASPECTS OF UPKEEP OF MY VEHICLE. IT CALLS FOR 32 PSI FRONT AND REAR. THE TIRES ARE ALWAYS WITHIN A COUPLE OF POUNDS OF THAT FIGURE. GRANTED THE WEAR DOES LOOK LIKE OVERINFLATION. SOMETHING IS WRONG WITH THE TIRE OR THE VEHICLE. I HAVE MADE SURE THE ALIGNMENT IS RIGHT ON AND IT DOES ALIGHN PROPERLY SO I TEND TO BELIEVE IT IS THE MICHLIN CROSS TERRIAN 235X65X18 TIRES. OTHER THAN THE TRANS WHICH THE DEALERSHIP ADVISES WILL BE FIXED WITH A SOFTWARE UPGRADE AND THE TIRE PROBLEM, EVERYTHING ELSE IS VERY SATISFACTORY WITH THE VEHICLE. *TR
NHTSA ODI #10261033
Mileage unknown · Mar 3, 2009
Engine And Engine CoolingEquipment
I HAVE HAD TO REPLACE THREE RADIATORS IN MY VEHICLE SINCE PURCHASING THE AUTO IN SEPT OF 06. THE FIRST ONE WAS REPLACED AT 26,048 MILES (UNDER WARRANTY) THE 2ND 33,202 MILES (UNDER WARRANTY)AND THE LAST ONE OCCURRED WITH 53000 MILES (NO LONGER COVERED). EACH TIME THEY REPLACED THE RADIATOR WITH A BRAND NEW ONE. I HAVE ALSO CO…
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I HAVE HAD TO REPLACE THREE RADIATORS IN MY VEHICLE SINCE PURCHASING THE AUTO IN SEPT OF 06. THE FIRST ONE WAS REPLACED AT 26,048 MILES (UNDER WARRANTY) THE 2ND 33,202 MILES (UNDER WARRANTY)AND THE LAST ONE OCCURRED WITH 53000 MILES (NO LONGER COVERED). EACH TIME THEY REPLACED THE RADIATOR WITH A BRAND NEW ONE. I HAVE ALSO CONTACTED FORD / MERCURY TO LOOK FOR ASSISTANCE ON THIS PROBLEM AND WHY THIS IS HAPPENING AND THEY DIRECTED ME BACK TO THE DEALERSHIP. I DO NOT BELIEVE THIS IS NORMAL WEAR AND TEAR ON MY VEHICLE. *TR
NHTSA ODI #10260564
39,390 miles · Jan 23, 2009
Engine And Engine Cooling
THERE IS A BIG PROBLEM WITH THE 2006 MERCURY MOUNTAINEERS AND FORD EXPLORERS WITH THE V6'S RADIATOR. AT VERY LOW MILEAGES THE RADIATOR SEPARATES AT THE SEAMS ON THE SIDE CAUSING A LEAK. THIS IS VERY DANGEROUS AND EXPENSIVE. I HAVE DONE RESEARCH ON THE PROBLEM AND IT IS TERRIBLE THAT YOU ONLY GET 40K OR LESS OUT OF A RADIATOR.…
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THERE IS A BIG PROBLEM WITH THE 2006 MERCURY MOUNTAINEERS AND FORD EXPLORERS WITH THE V6'S RADIATOR. AT VERY LOW MILEAGES THE RADIATOR SEPARATES AT THE SEAMS ON THE SIDE CAUSING A LEAK. THIS IS VERY DANGEROUS AND EXPENSIVE. I HAVE DONE RESEARCH ON THE PROBLEM AND IT IS TERRIBLE THAT YOU ONLY GET 40K OR LESS OUT OF A RADIATOR. THERE NEEDS TO BE A RECALL ON THIS PROBLEM!!! PLEASE HELP. *TR
NHTSA ODI #10256143
20,784 miles · Dec 23, 2008
Power Train
I HAVE JUST PURCHASED A USED 2006 MERCURY MOUNTAINEER AWD V8. WHEN THE VEHICLE IS COMING TO A STOP, THE TRANSMISSION LUNGES FORWARD AS IT IS DOWNSHIFTING. IT FEELS JUST LIKE ANOTHER VEHICLE HAS HIT MY VEHICLE FROM BEHIND. THIS IS A DANGEROUS SITUATION SINCE AS THE VEHICLE LUNGES FORWARD, IT COULD HIT A PEDESTRIAN IN A CROSS W…
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I HAVE JUST PURCHASED A USED 2006 MERCURY MOUNTAINEER AWD V8. WHEN THE VEHICLE IS COMING TO A STOP, THE TRANSMISSION LUNGES FORWARD AS IT IS DOWNSHIFTING. IT FEELS JUST LIKE ANOTHER VEHICLE HAS HIT MY VEHICLE FROM BEHIND. THIS IS A DANGEROUS SITUATION SINCE AS THE VEHICLE LUNGES FORWARD, IT COULD HIT A PEDESTRIAN IN A CROSS WALK OR HIT ANOTHER VEHICLE IN FRONT OF ME. *TR
NHTSA ODI #10252649
23,000 miles · Dec 9, 2008
Power Train
WHEN I STOP MY TRANNY KICKS AND IT FEELS LIKE I GOT HIT IN THE REAR. I TOOK IT TOO FM DEALER AND THEY ADJUSTED THE COMP, BUT DIDN'T FIX THE PROB. IT GOT WORSE. *TR
NHTSA ODI #10251232