NHTSA owner reports · September 18, 2026 snapshot.
Engine And Engine Cooling complaints
43 reportsClear category filter143,869 miles · Dec 27, 2022
Engine And Engine Cooling
The contact owns a 2006 Mercury Mountaineer. The contact stated that her husband informed her that the vehicle had experienced an unknown radiator failure. The vehicle was taken to an independent mechanic, where the radiator was replaced; however, the failure reoccurred. The vehicle was repaired for a second time by an independe…
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The contact owns a 2006 Mercury Mountaineer. The contact stated that her husband informed her that the vehicle had experienced an unknown radiator failure. The vehicle was taken to an independent mechanic, where the radiator was replaced; however, the failure reoccurred. The vehicle was repaired for a second time by an independent mechanic; however, the failure persisted. The local dealer was made aware of the failure. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 143,869.
NHTSA ODI #11498964
106,000 miles · Jan 27, 2015
Engine And Engine Cooling
TL* THE CONTACT OWNS A 2006 MERCURY MOUNTAINEER. THE CONTACT STATED THAT WHILE DRIVING AT APPROXIMATELY 25 MPH, AN UNKNOWN WARNING LIGHT ILLUMINATED. THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC WHERE THE RADIATOR WAS REPLACED, BUT THE FAILURE RECURRED. THE VEHICLE WAS THEN TAKEN TO AN INDEPENDENT MECHANIC WHERE IT WAS DIAGN…
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TL* THE CONTACT OWNS A 2006 MERCURY MOUNTAINEER. THE CONTACT STATED THAT WHILE DRIVING AT APPROXIMATELY 25 MPH, AN UNKNOWN WARNING LIGHT ILLUMINATED. THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC WHERE THE RADIATOR WAS REPLACED, BUT THE FAILURE RECURRED. THE VEHICLE WAS THEN TAKEN TO AN INDEPENDENT MECHANIC WHERE IT WAS DIAGNOSED THAT THE THREE WAY HEATER HOSE NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 106,000.
NHTSA ODI #10679247
Mileage unknown · Sep 29, 2014
Engine And Engine Cooling
2006 MERCURY MOUNTAINEER. CONSUMER WRITES IN REGARDS TO FAILURE OF THE WATER MANIFOLD HOUSING. *SMD THE CONSUMER STATED HE WAS DRIVING 70 MPH, WHEN THE ENGINE LIGHT ILLUMINATED. THE VEHICLE BEGAN TO OVERHEAT AND STEAM WAS COMING FROM UNDER THE HOOD. THE WATER MANIFOLD HOUSING HAD COME APART, ALLOWING WATER TO BOIL OUT. THE H…
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2006 MERCURY MOUNTAINEER. CONSUMER WRITES IN REGARDS TO FAILURE OF THE WATER MANIFOLD HOUSING. *SMD THE CONSUMER STATED HE WAS DRIVING 70 MPH, WHEN THE ENGINE LIGHT ILLUMINATED. THE VEHICLE BEGAN TO OVERHEAT AND STEAM WAS COMING FROM UNDER THE HOOD. THE WATER MANIFOLD HOUSING HAD COME APART, ALLOWING WATER TO BOIL OUT. THE HOUSING WAS PLASTIC AND MADE OF TWO PARTS. THE TOP AND BOTTOM WERE GLUED TOGETHER AND WITHIN THE TOTAL CIRCUMFERENCE OF ABOUT 18 INCHES, THERE WERE ONLY THREE BOLTS BETWEEN THE TOP AND BOTTOM HOUSINGS TO SECURE THE TWO PARTS TOGETHER, EXCEPT THE GLUE. THE CONSUMER BELIEVED THE CONSTRUCTION WAS NOT ENOUGH TO KEEP THEM FROM SEPARATING UNDER PRESSURE. IT APPEARED, THE DESIGN CREATED A TENDENCY FOR THE TOP PLATE TO PULL AWAY FROM THE LOWER HOUSING. THE CONSUMER ATTEMPTED TO INSTALL A NEW HOUSING, BUT HE DISCOVERED THE ENGINE WAS MISFIRING, SO THE VEHICLE HAD TO BE TOWED TO THE DEALER, WHERE THE LONG BLOCK ASSEMBLY WAS REPLACED.*JB
NHTSA ODI #10637899
52,000 miles · Aug 8, 2014
Engine And Engine Cooling
HAD A LEAK IN MY RADIATOR WHEN THE TRUCK HAD LESS THEN 25,000 (SUMMER OF 2009?) MILES LOGGED ON IT. TOOK IT TO THE DEALERSHIP AND THEY REPLACED IT FOR FREE BECAUSE IT WAS UNDER WARRANTY. AGAIN THIS SPRING, WITH MY ODOMETER AT 52000 MILES, IT HAS ANOTHER LEAK AND I WAS QUOTED $800 TO GET IT REPLACED BECAUSE IT IS NO LONGER UNDER…
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HAD A LEAK IN MY RADIATOR WHEN THE TRUCK HAD LESS THEN 25,000 (SUMMER OF 2009?) MILES LOGGED ON IT. TOOK IT TO THE DEALERSHIP AND THEY REPLACED IT FOR FREE BECAUSE IT WAS UNDER WARRANTY. AGAIN THIS SPRING, WITH MY ODOMETER AT 52000 MILES, IT HAS ANOTHER LEAK AND I WAS QUOTED $800 TO GET IT REPLACED BECAUSE IT IS NO LONGER UNDER WARRANTY. THIS IS B.S.! OBVIOUSLY IT IS A KNOWN PROBLEM. I HAVE NOT HAD IT FIXED YET BECAUSE I DON'T HAVE THE TIME TO LEAVE IT AT THE DEALERSHIP, OR THE $800 TO REPLACE A RADIATOR THAT SHOULD NOT NEED TO BE REPLACED AFTER SUCH A SHORT AMOUNT OF USE. THIS ISSUE NEEDS TO BE RECTIFIED BY FORD! IT HAS MADE ME NEVER WANT TO BUY ANOTHER FORD VEHICLE, EVER! *TR
NHTSA ODI #10620795
100,000 miles · Jan 14, 2014
EngineEngine And Engine Cooling
TL* THE CONTACT OWNS A 2006 MERCURY MOUNTAINEER. THE CONTACT STATED THAT WHILE APPROACHING THE VEHICLE, HE NOTICED THAT THERE WAS ANTIFREEZE LEAKING ONTO THE GROUND. THE VEHICLE WAS NOT TAKEN TO THE DEALER FOR INSPECTION. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 100,…
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TL* THE CONTACT OWNS A 2006 MERCURY MOUNTAINEER. THE CONTACT STATED THAT WHILE APPROACHING THE VEHICLE, HE NOTICED THAT THERE WAS ANTIFREEZE LEAKING ONTO THE GROUND. THE VEHICLE WAS NOT TAKEN TO THE DEALER FOR INSPECTION. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 100,000. THE VIN WAS UNAVAILABLE. UPDATED 02/11/2014 *BF THE CONSUMER STATED THE RADIATOR WAS LEAKING IN THE SEAMS. THE RADIATOR WAS EVENTUALLY REPLACED AT A COST OF $400.00. UPDATED 02-2-/14
NHTSA ODI #10559777
53,000 miles · Nov 6, 2013
Engine And Engine Cooling
THE RADIATOR KEEPS LEAKING, FIRST DEALER SAID THERE WAS NOTHING WRONG WITH THE VEHICLE, I AM ALWAYS PUTTING COOLANT IN THE VEHICLE. YOU CAN SMELL THE COOLANT AS SOON AS YOU OPEN THE HOOD. THIS HAS BEEN AN ONGOING PROBLEM SINCE I HAD 53,000 MILES AND NOW THAT I HAVE 122,000 MILES IT IS GETTING WORSE AND HAS TO BE REPAIRED AGAIN…
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THE RADIATOR KEEPS LEAKING, FIRST DEALER SAID THERE WAS NOTHING WRONG WITH THE VEHICLE, I AM ALWAYS PUTTING COOLANT IN THE VEHICLE. YOU CAN SMELL THE COOLANT AS SOON AS YOU OPEN THE HOOD. THIS HAS BEEN AN ONGOING PROBLEM SINCE I HAD 53,000 MILES AND NOW THAT I HAVE 122,000 MILES IT IS GETTING WORSE AND HAS TO BE REPAIRED AGAIN. *TR
NHTSA ODI #10551076
58,000 miles · May 22, 2013
Engine And Engine Cooling
PLEASE INVESTIGATE FORD MERCURY FAULTY RADIATORS. THERE IS A DESIGN FLAW AND SHOULD BE RECALLED. *TR
NHTSA ODI #10513109
65,000 miles · May 13, 2013
Engine And Engine Cooling
TL* THE CONTACT OWNS A 2006 MERCURY MOUNTAINEER. THE CONTACT STATED THAT THERE WAS A LEAK FROM THE RADIATOR AND THE CONTACT HAD TO FILL THE RADIATOR CONSTANTLY. THE VEHICLE WAS NOT TAKEN TO A DEALER OR A REPAIR SHOP FOR DIAGNOSTICS OR REPAIRS. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 65,000. TH…
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TL* THE CONTACT OWNS A 2006 MERCURY MOUNTAINEER. THE CONTACT STATED THAT THERE WAS A LEAK FROM THE RADIATOR AND THE CONTACT HAD TO FILL THE RADIATOR CONSTANTLY. THE VEHICLE WAS NOT TAKEN TO A DEALER OR A REPAIR SHOP FOR DIAGNOSTICS OR REPAIRS. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 65,000. THE CURRENT MILEAGE WAS 68,000. UPDATED 07/10/13*LJ
NHTSA ODI #10511692
80,000 miles · Oct 25, 2012
Engine And Engine Cooling
VEHICLE NEEDED A RADIATOR. THE DEALERSHIP REPLACED THE RADIATOR AND CONTINUES TO LEAK ANTIFREEZE CAUSING VEHICLE TO OVER HEAT. *TR
NHTSA ODI #10482280
95,000 miles · Aug 23, 2012
Engine And Engine Cooling
TL* THE CONTACT OWNS A 2006 MERCURY MOUNTAINEER. THE CONTACT STATED THAT THE RADIATOR WAS CRACKED AND HAD TO BE REPLACED TWICE. THE DEALER REPLACED THE RADIATOR SIX YEARS AGO AND ALSO NEEDED REPLACING RECENTLY. THE MANUFACTURER WAS NOT NOTIFIED. THE FAILURE MILEAGE WAS 95,000. UPDATED 9/12/12 *CN
NHTSA ODI #10471990