2006 MERCURY MOUNTAINEER. RADIATOR BEING REPLACED FOR THE 2ND TIME IN 8 MONTHS. ACCORDING TO THE MECHANIC THE RADIATOR IS COMPLETELY CORRODED BOTH TIMES. *TR
2006 Mercury Mountaineer
Owner reports · Recalls · Investigations
Similar to other model years
Owner complaints for the 2006 Mercury Mountaineer do not stand out strongly from the model-year median of 117.
About this comparison →How this year compares
Owner complaints by model year
Compare all Mountaineer years →Counts vary with age, sales and reporting. They are not failure rates.
What owners reported most
All reported categories
Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
94 reports with mileage · 23 unknown
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
- Engine And Engine Cooling. Review the 43 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Power Train. Review the 39 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Engine. Review the 14 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
Engine And Engine Cooling complaints
43 reports2006 MERCURY MOUNTAINEER DRIVING ON THE HIGHWAY, SUDDENLY THE COOLANT TEMPERATURE WENT UP CRAZILY AND THE ENGINE SOUNDED HORRIBLE AND LOST POWER. FORTUNATELY STOPPED BY THE ROADSIDE AND FOUND THE RADIATOR WAS LEAKING AND COOLANT IS ALMOST EMPTY. SEARCHED AROUND THE WEB AND FOUND THAT FOR 4.0 ENGINE FROM FORD AND MERCURY, THIS I…
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2006 MERCURY MOUNTAINEER DRIVING ON THE HIGHWAY, SUDDENLY THE COOLANT TEMPERATURE WENT UP CRAZILY AND THE ENGINE SOUNDED HORRIBLE AND LOST POWER. FORTUNATELY STOPPED BY THE ROADSIDE AND FOUND THE RADIATOR WAS LEAKING AND COOLANT IS ALMOST EMPTY. SEARCHED AROUND THE WEB AND FOUND THAT FOR 4.0 ENGINE FROM FORD AND MERCURY, THIS IS PRETTY NORMAL PROBLEM DUE TO A DESIGN DEFECT. PEOPLE ARE CHANGING RADIATOR EVERY YEAR. NEVER HEARD SUCH RIDICULOUS THING THAT NOWADAYS THE RADIATOR LAST SO SHORT TIME. IT SHOULD LAST LIFE TIME OF THE CAR. FORD APPARENTLY KNEW IT, HOWEVER, THEY ONLY ANNOUNCED A TSB IN 2009 WHEN MOST OF THE WARRANTIES WERE GONNA EXPIRE. THEY SHOULD ISSUE A RECALL. THIS IS A DESIGN PROBLEM AND IT POSES LIFE THREATENING RISKS. I GUESS THEY JUST DON'T CARE ABOUT CUSTOMERS. THE CUSTOMERS NEED TO REPAIR OUT OF THEY OWN POCKETS, WHICH SUPPORT FORD'S CHAIN DEALERS SERVICE DEPARTMENTS. WELL, SOUNDS A GOOD PLAN FOR THEM. WELL, THE CUSTOMERS ARE NOT STUPID. THEY ARE CHANGE TO JAPANESE CARS, WHICH HAVE FAR LESS PROBLEMS. I WILL NEVER A FORD?MERCURY CAR AND WOULD BE GLAD TO SEE THEM GO BANKRUPTCY. *TR
TL*THE CONTACT OWNS A 2006 MERCURY MOUNTAINEER. THE CONTACT STATED THAT WHILE THE VEHICLE WAS HAVING A REGULAR MAINTENANCE PERFORMED THE MECHANIC NOTICED THE RADIATOR WAS CRACKED. ALSO, THE TEMPERATURE GAUGE DID NOT INDICATE THAT THE VEHICLE WAS HOT. THE VEHICLE WAS TAKEN TO THE DEALER WHO STATED THAT THE RADIATOR WAS CRACKED CA…
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TL*THE CONTACT OWNS A 2006 MERCURY MOUNTAINEER. THE CONTACT STATED THAT WHILE THE VEHICLE WAS HAVING A REGULAR MAINTENANCE PERFORMED THE MECHANIC NOTICED THE RADIATOR WAS CRACKED. ALSO, THE TEMPERATURE GAUGE DID NOT INDICATE THAT THE VEHICLE WAS HOT. THE VEHICLE WAS TAKEN TO THE DEALER WHO STATED THAT THE RADIATOR WAS CRACKED CAUSING A LEAKAGE AND IT NEEDED TO BE REPLACED. THE MANUFACTURER WAS CONTACTED WHO REFUSED TO PROVIDE ANY ASSISTANCE. THE VEHICLE WAS REPAIRED. THE FAILURE MILEAGE 42,000 AND CURRENT MILEAGE WAS 48,000.
RADIATOR DEFECT IN 2006 MERCURY MOUNTAINEER. REPLACED AT 40,000 MILES AND AT 80,000 MILES. NOT COVERED UNDER WARRANTY AND NOT RECALLED AS OF YET. *TR
MY 2006 MERCURY MOUNTAINEER RADIATOR IS CRACKED. I 'VE ASKED MECHANICS AND THEY TOLD ME THAT THE RADIATORS HAVE HAD PROBLEMS. I WENT ONLINE AND THERE SEEMS TO BE THE SAME PROBLEM THAT I AM HAVING. I'M SURE FORD IS AWARE OF THE PROBLEM BUT THEY ARE NOT TAKING ANY ACTION TOWARDS THE PROBLEM. CAN YOU HELP US. *TR
MY 2006 MERCURY MOUNTAINEER RADIATOR NEEDS REPLACING BECAUSE IT IS BUSTED. I ONLY HAVE AN ESTIMATE OF 65,000 MILES ON IT. THE PART WILL COST ME $285.00 NOT INCLUDING THE LABOR. THIS VEHICLE IS ONLY 4 YEARS OLD HOW COULD A PART LIKE THIS ALREADY NEED REPLACING. *TR
RADIATOR LEAK. COMPLETE RADIATOR WAS REPLACED WITH NEW RADIATOR AND HOSES AND STILL LEAKED. I BELIEVE FORD'S RADIATORS ARE DEFECTIVE. *TR
TL* THE CONTACT OWNS A 2006 MERCURY MOUNTAINEER. THE CONTACT STATED THAT THE RADIATOR CONTINUED TO LEAK COOLANT. THE CONTACT STATED THAT THE RADIATOR WAS PREVIOUSLY REPLACED TWICE FOR THE EXACT SAME FAILURE. THE LEAKING HAD NOT CAUSED THE VEHICLE TO OVERHEAT BUT THE CONTACT STATED THAT THE COOLANT ODOR WAS OVERWHELMING FROM THE …
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TL* THE CONTACT OWNS A 2006 MERCURY MOUNTAINEER. THE CONTACT STATED THAT THE RADIATOR CONTINUED TO LEAK COOLANT. THE CONTACT STATED THAT THE RADIATOR WAS PREVIOUSLY REPLACED TWICE FOR THE EXACT SAME FAILURE. THE LEAKING HAD NOT CAUSED THE VEHICLE TO OVERHEAT BUT THE CONTACT STATED THAT THE COOLANT ODOR WAS OVERWHELMING FROM THE VEHICLE INTERIOR. THE CONTACT CALLED THE MANUFACTURER AND THEY STATED THAT THE VEHICLE WAS OUT OF WARRANTY AND THERE WERE NO RECALLS SO THEY WERE UNABLE TO ASSIST. THE FAILURE MILEAGE WAS 96,000.
RADIATOR BEGAN LEAKING IN MY 2006 MERCURY MOUNTAINEER AT 51,500 MILES. *TR
TL* THE CONTACT OWNS A 2006 MERCURY MOUNTAINEER. WHILE DRIVING APPROXIMATELY 40 MPH, THE CONTACT NOTICED THE TEMPERATURE GAUGE DISPLAYED A "HIGH TEMPERATURE" READING. THE VEHICLE WAS PULLED OVER TO THE SIDE OF THE ROAD AND THE ENGINE WAS TURNED OFF. THE ENGINE OVERHEATED WITH EXCESSIVE LEAKAGE OF COOLANT. THE CONTACT DISPENSED…
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TL* THE CONTACT OWNS A 2006 MERCURY MOUNTAINEER. WHILE DRIVING APPROXIMATELY 40 MPH, THE CONTACT NOTICED THE TEMPERATURE GAUGE DISPLAYED A "HIGH TEMPERATURE" READING. THE VEHICLE WAS PULLED OVER TO THE SIDE OF THE ROAD AND THE ENGINE WAS TURNED OFF. THE ENGINE OVERHEATED WITH EXCESSIVE LEAKAGE OF COOLANT. THE CONTACT DISPENSED COOLANT INTO THE RADIATOR RESERVOIR. THE VEHICLE WAS ABLE TO CONTINUE FOR APPROXIMATELY TEN MILES BEFORE THE IDENTICAL FAILURES RECURRED IN WHICH THE RADIATOR REQUIRED ADDITIONAL COOLANT. THE FAILURES OCCURRED WHENEVER THE VEHICLE WAS IN OPERATION. THE AUTHORIZED DEALER WAS NOTIFIED OF THE MALFUNCTIONS AND THEY INFORMED THAT THERE WAS A TECHNICAL SERVICE BULLETIN REGARDING THE ENGINE AND ENGINE COOLING: COOLING SYSTEM: RADIATOR ASSEMBLY. THE BULLETIN NUMBER WAS 0638. THE VEHICLE WAS NOT BEING DRIVEN AT THE TIME OF THE COMPLAINT DUE TO THE POTENTIAL SAFETY HAZARD. THE FAILURE MILEAGE WAS 50,000.
Official recalls
105V520000 · Visibility:windshield Wiper/washer:motor
Nov 9, 2005
ON CERTAIN TRUCKS, PASSENGER CARS AND SPORT UTILITY VEHICLES, THE WINDSHIELD WIPER MOTOR MAY HAVE BEEN PRODUCED WITHOUT GREASE BEING APPLIED TO THE OUTPUT SHAFT GEAR.
Consequence & remedy
Consequence: AFTER A PERIOD OF CONTINUOUS USE ON THE HIGH SPEED SETTING, LACK OF GREASE ON THE OUTPUT SHAFT GEAR MAY CAUSE THE GEAR TO DISTORT OR FRACTURE DURING OPERATION RESULTING IN A LOSS OF WIPER FUNCTION. INOPERATIVE WIPERS UNDER INCLEMENT WEATHER CONDITIONS COULD CAUSE A CRASH DUE TO IMPAIRED VISIBILITY.
Remedy: DEALERS WILL INSPECT THE WIPER MOTOR FOR THE PRESENCE OF GREASE AND GREASE THE WIPER MOTOR GEARS IF NECESSARY. THE RECALL BEGAN ON NOVEMBER 22, 2005. OWNERS MAY CONTACT FORD AT 1-800-392-3673 OR LINCOLN/MERCURY AT 1-800-521-4140.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
0No exact-year investigations in this snapshot.
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