NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
117 reports33,244 miles · May 28, 2010
Engine And Engine Cooling
TL*THE CONTACT OWNS A 2006 MERCURY MOUNTAINEER. WHILE THE CONTACT WAS DRIVING APPROXIMATELY 2 MPH IN A PARKING LOT, THERE WAS A STRONG ODOR OF ANTI-FREEZE COMING FROM THE VEHICLE. THE FAILURE OCCURRED WHENEVER THE VEHICLE WAS IN OPERATION AT ANY GIVEN SPEED BEING TRAVELED. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC FOR DI…
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TL*THE CONTACT OWNS A 2006 MERCURY MOUNTAINEER. WHILE THE CONTACT WAS DRIVING APPROXIMATELY 2 MPH IN A PARKING LOT, THERE WAS A STRONG ODOR OF ANTI-FREEZE COMING FROM THE VEHICLE. THE FAILURE OCCURRED WHENEVER THE VEHICLE WAS IN OPERATION AT ANY GIVEN SPEED BEING TRAVELED. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC FOR DIAGNOSIS. THE FAILURE WAS CONTRIBUTED TO A CRACK IN THE RADIATOR WHICH CAUSED EXCESSIVE ANTI-FREEZE LEAKAGE. THE MECHANIC ADVISED THE ANTI-FREEZE LEAKAGE WAS A COMMON PROBLEM. THE VEHICLE HAD NOT BEEN REPAIRED AT THE TIME OF THE COMPLIANT. THE FAILURE MILEAGE WAS 33,244.
NHTSA ODI #10332623
54,175 miles · Mar 23, 2010
Engine And Engine Cooling
THE RADIATOR IN THE 2006 FORD EXPLORER/MERCURY MOUNTAINEER IS A WEAK LINK IN THE VEHICLE. MY RADIATOR IS LEAKING AND I'M NOT THE ONLY ONE, I HAVE FOUND OTHER COMPLAINTS OF THIS ON OTHER EXPLORERS AND MOUNTAINEERS OF THIS YEAR.
NHTSA ODI #10321668
65,000 miles · Mar 11, 2010
Engine And Engine CoolingService Brakes, Hydraulic
TL* THE CONTACT OWNS A 2006 MERCURY MOUNTAINEER. HE HAS EXPERIENCED SEVERAL FAILURES WITH THE VEHICLE. IN AN ATTEMPT TO DIAGNOSE THE FAILURE THE VEHICLE WAS TAKEN TO SEVERAL DIFFERENT REPAIR CENTERS, TO NO AVAIL. WHEN CONTACTING HIS LOCAL DEALER THE CONTACT WAS ADVISED THAT THE VEHICLE WOULD NEED SEVERAL REPAIRS INCLUDING A FAIL…
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TL* THE CONTACT OWNS A 2006 MERCURY MOUNTAINEER. HE HAS EXPERIENCED SEVERAL FAILURES WITH THE VEHICLE. IN AN ATTEMPT TO DIAGNOSE THE FAILURE THE VEHICLE WAS TAKEN TO SEVERAL DIFFERENT REPAIR CENTERS, TO NO AVAIL. WHEN CONTACTING HIS LOCAL DEALER THE CONTACT WAS ADVISED THAT THE VEHICLE WOULD NEED SEVERAL REPAIRS INCLUDING A FAILED RADIATOR, THERMOSTAT, WATER PUMP, BRAKE DRUMS, ROTORS AND A GREASE TREATMENT, ALL AT HIS OWN EXPENSE. THE MANUFACTURER WAS CONTACTED AND WOULD NOT OFFER ANY ASSISTANCE. THE FAILURE MILEAGE WAS APPROXIMATELY 65,000 AND THE CURRENT MILEAGE WAS 107,253.
NHTSA ODI #10318822
Mileage unknown · Feb 15, 2010
Engine And Engine Cooling
BROKEN RADIATOR IN MY 2006 MERCURY MOUNTAINEER WITH 52,000 MILES. *TR
NHTSA ODI #10310509
41,500 miles · Feb 1, 2010
Engine And Engine Cooling
CRACKED RADIATOR WITH ONLY 41,000 MILES. DEALERSHIP INDICATED REPAIR COST WOULD BE $1,000. WHEN I QUESTIONED POSSIBLE DEFECT THEY SAID THEY HAD NO RECALLS BUT ALSO INDICATED THEY HAD JUST REPLACED ANOTHER ONE LAST WEEK. I CALLED ANOTHER DEALERSHIP TO CHECK PRICE THEY ESTIMATED $750 AND ALSO INDICATED THEY HAD TO REPLACE 2-3 I…
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CRACKED RADIATOR WITH ONLY 41,000 MILES. DEALERSHIP INDICATED REPAIR COST WOULD BE $1,000. WHEN I QUESTIONED POSSIBLE DEFECT THEY SAID THEY HAD NO RECALLS BUT ALSO INDICATED THEY HAD JUST REPLACED ANOTHER ONE LAST WEEK. I CALLED ANOTHER DEALERSHIP TO CHECK PRICE THEY ESTIMATED $750 AND ALSO INDICATED THEY HAD TO REPLACE 2-3 IN THE LAST FEW MONTHS. JUDGING FROM THIS SITE AND OTHERS THIS IS A MAJOR DEFECT WITH 2006 FORD EXPLORERS AND MOUNTAINEERS. WHY DOESN'T ANYONE HOLD THE MANUFACTURER ACCOUNTABLE? *TR
NHTSA ODI #10303684
69,543 miles · Jan 27, 2010
Engine And Engine Cooling
LEAKY RADIATOR WAS 1ST DETECTED BY MYSELF BUT MECHANICS WERE UNABLE TO DETERMINE THE LEAK BECAUSE ANTI-FREEZE WAS NOT VISIBLY LEAKING BUT THE RESEVOIR WAS ALWAYS EMPTY. I WAS TOLD IT WAS A PROBLEM WITH MY TIRES. THE PROBLEM WAS NOT ADDRESSED BY MECHANICS UNTIL THEY SAW THAT THE RADIATOR COULD NOT HOLD COOLANT ANY LONGER. NOW IT …
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LEAKY RADIATOR WAS 1ST DETECTED BY MYSELF BUT MECHANICS WERE UNABLE TO DETERMINE THE LEAK BECAUSE ANTI-FREEZE WAS NOT VISIBLY LEAKING BUT THE RESEVOIR WAS ALWAYS EMPTY. I WAS TOLD IT WAS A PROBLEM WITH MY TIRES. THE PROBLEM WAS NOT ADDRESSED BY MECHANICS UNTIL THEY SAW THAT THE RADIATOR COULD NOT HOLD COOLANT ANY LONGER. NOW IT HAS BEEN IDENTIFIED AS HAVING A HOLE IN THE RADIATOR.
NHTSA ODI #10302488
36,500 miles · Dec 29, 2009
Engine And Engine Cooling
HAD TO REPLACE RADIATOR AT 36,500 MILES. PURCHASED VEHICLE ON SEPT 9, 2009 AS A CERTIFIED MERCURY VEHICLE AND WITHIN 3 MONTHS HAD A LEAK IN THE RADIATOR THAT NEEDED TO BE REPLACED. *TR
NHTSA ODI #10297368
115,584 miles · Nov 15, 2009
Power Train
MY TRUCK HAS 115,000 MILES ON IT, TRANSMISSION IS NOW GONE. WHEN I PUT IT IN REVERSE IT WOULD JERK BACK LIKE THE IT WAS BEING HIT, ALL OF SUDDEN IT STARTED DRAGGING WHILE DRIVING, AND HAVING PROBLEMS SHIFTING INTO GEAR, AND NOW ITS TOTALLY GONE...ONLY HAD THE VEHICLE TWO YEARS. *TR
NHTSA ODI #10292241
Mileage unknown · Nov 9, 2009
Power Train
V8 MOUNTAINEER JOLTS WHEN YOU COME TO STOP, FEELS LIKE IT HAS BEEN REAR ENDED, NO ACCIDENTS AT THIS POINT, BUT THERE HAS BEEN A FEW CLOSE CALLS. *TR
NHTSA ODI #10291598
20,000 miles · Nov 7, 2009
Power Train
2006 MERCURY MOUNTAINEER TRANSMISSION PROBLEMS. HESITATION, FUNNY SHIFTING. COULD GET SOMEONE IN TROUBLE BY THE RANDOM SHIFTING PROBLEM. FORD DEALER I WENT TO SAID THEY HAD NEVER HEARD OF THE PROBLEM. WHEN YOU GOOGLE THIS IT IS A PROBLEM THANKS *TR
NHTSA ODI #10291300
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