NHTSA owner reports · September 18, 2026 snapshot.
Engine And Engine Cooling complaints
43 reportsClear category filter33,244 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
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
Mileage unknown · Mar 17, 2009
Engine And Engine Cooling
THE EXHAUST SYSTEM FROM THE CATALYTIC CONVERTER DISENGAGED. *TR
NHTSA ODI #10262098
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