RADIATOR LEAK. COMPLETE RADIATOR WAS REPLACED WITH NEW RADIATOR AND HOSES AND STILL LEAKED. I BELIEVE FORD'S RADIATORS ARE DEFECTIVE. *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.
What owners actually said
117 reportsTL*THE CONTACT OWNS A 2006 MERCURY MOUNTAINEER. THE CONTACT STATED THAT WHEN THE GEAR WAS SHIFTED FROM DRIVE TO PARK THE VEHICLE DID NOT MOVE. SHE TOOK THE VEHICLE TO THE DEALER WHO STATED THAT THE SHIFT SOLENOID NEEDED TO BE REPLACED AND THE TRANSMISSION FLUSHED. THE DEALER PERFORMED THE REPAIRS AND THE FOLLOWING DAY THE VEHI…
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TL*THE CONTACT OWNS A 2006 MERCURY MOUNTAINEER. THE CONTACT STATED THAT WHEN THE GEAR WAS SHIFTED FROM DRIVE TO PARK THE VEHICLE DID NOT MOVE. SHE TOOK THE VEHICLE TO THE DEALER WHO STATED THAT THE SHIFT SOLENOID NEEDED TO BE REPLACED AND THE TRANSMISSION FLUSHED. THE DEALER PERFORMED THE REPAIRS AND THE FOLLOWING DAY THE VEHICLE BEGAN TO EXPERIENCE THE SAME FAILURE. THE VEHICLE ALSO MADE A LOUD THUMPING NOISE WHILE SHIFTING INTO REVERSE. THE CONTACT TOOK THE VEHICLE BACK TO THE DEALER AND WAS WAITING FOR THEM TO COMPLETE THE DIAGNOSTIC TEST. THE WAS CONCERNED SINCE THE FAILURE WAS A MAJOR SAFETY ISSUE THAT NEEDED TO BE ADDRESSED. THE FAILURE MILEAGE WAS 62,000.
MY CAR IS 2006 MERCURY MOUNTAINEER IN 2007 ALREADY THE SHIFT HAD TO BE REPLACED AS IT CONTINUALLY GOT STUCK. ONE DEALER TOLD ME THE SHIFT NEEDED TO CHANGED YET AGAIN AND NOW WHEN THE CAR IS TAKEN OUT OF PARK INTO ANY GEAR IT WONT MOVE IT TAKES ABOUT 25 MINS TO ACTUALLY PUT INTO GEAR. THE DEALER SAID IT WAS A SHIFT SOLENOID I HA…
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MY CAR IS 2006 MERCURY MOUNTAINEER IN 2007 ALREADY THE SHIFT HAD TO BE REPLACED AS IT CONTINUALLY GOT STUCK. ONE DEALER TOLD ME THE SHIFT NEEDED TO CHANGED YET AGAIN AND NOW WHEN THE CAR IS TAKEN OUT OF PARK INTO ANY GEAR IT WONT MOVE IT TAKES ABOUT 25 MINS TO ACTUALLY PUT INTO GEAR. THE DEALER SAID IT WAS A SHIFT SOLENOID I HAD IT REPLACED A TRANSMISSION FLUSH AND REPROGRAM AND STILL THE SAME PROBLEM THE CAR ONLY HAS 62,000 MILES. *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.
MY MERCURY MOUNTAINERS 2006 THIRD ROW RIGHT SEAT GOT JAMMED WHILE MY SON WAS SEATED IN THE LEFT SEAT NEXT TO IT ALMOST PINCHING HIM IN THE SEAT AND I LOOKED AT A COUPLE OF WEBSITES AND IT STATES MANY PEOPLE ARE HAVING THE SAME PROBLEM I THINK THEY SHOULD LOOK INTO THIS PROBLEM BEFORE SOME ONE GETS HURT. *TR
RADIATOR BEGAN LEAKING IN MY 2006 MERCURY MOUNTAINEER AT 51,500 MILES. *TR
2006 MERCURY MOUNTAINEER, BLEW A TIRE, THEN WENT OFF THE RIGHT SIDE OF THE ROAD STRUCK 3 BRIDGE PILLARS AND THEN JACK KNIFED, COMING TO REST IN THE MEDIAN. *BF (OHIO TRAFFIC CRASH REPORT # 10-0245-89) UPDATED 08/06/10 *BF
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.
2006 MERCURY MOUNTAINEER V8 AWD--WHEN SHIFTING FROM PARK TO DRIVE OR REVERSE IT "CLUNKS" HARD INTO GEAR. THE WRENCH SYMBOL AND THE ENGINE SYMBOL LIGHT UP. THE VEHICLE ALSO DRIVES HARD AS IF IT ISN'T CHANGING GEARS. THE DEALERSHIP WILL ONLY SAY THAT THE FORD TSB RECOMMENDS REPLACING THE TRANSMISSION FLUID AND FILTER, THEN RESEALI…
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2006 MERCURY MOUNTAINEER V8 AWD--WHEN SHIFTING FROM PARK TO DRIVE OR REVERSE IT "CLUNKS" HARD INTO GEAR. THE WRENCH SYMBOL AND THE ENGINE SYMBOL LIGHT UP. THE VEHICLE ALSO DRIVES HARD AS IF IT ISN'T CHANGING GEARS. THE DEALERSHIP WILL ONLY SAY THAT THE FORD TSB RECOMMENDS REPLACING THE TRANSMISSION FLUID AND FILTER, THEN RESEALING WITH FOAM SEAL FIRST BUT REFUSES TO GIVE ME AN ACTUAL DIAGNOSIS OF WHAT IS GOING ON WITH THE CAR. THEY CAN NOT TELL ME THE REAL PROBLEM AND INSIST THAT WE WILL HAVE TO WORK THROUGH THE VARIOUS STEPS ON THE FORD TSBS WHICH MAY OR MAY NOT WORK (BY THEIR OWN ADMISSION) AND THE COST OF FINAL REPAIRS IS COMPLETELY OPEN ENDED. WHEN I QUESTIONED WHAT WE WOULD TRY NEXT AFTER THE TRANSMISSION FLUID/FILTER REPLACEMENT (BECAUSE I WAS SKEPTICAL ABOUT THIS CAUSING THE ISSUE ON A VEHICLE WITH ONLY 43,000 MILES) THEY HAD NO ANSWERS AT ALL. WE HAVE OWNED THIS VEHICLE LESS THAN A YEAR. AN INTERNET SEARCH REVEALS THAT THIS IS A MAJOR ONGOING PROBLEM WITH THIS MODEL BUT FORD REFUSES TO OWN UP TO IT. THERE NEEDS TO BE A RECALL. *TR
2006 MERCURY MOUNTAINEER SHIFTS HARD WHEN GOING INTO REVERSE, AND IS ALSO STARTING TO SHIFT HARD FROM 2ND TO 3RD GEAR. HAVE HEARD FROM MANY THERE PEOPLE WITH 2006 FORD EXPLORERS THAT THERE IS A MANUFACTURER DEFECT IN THE TRANSMISSION. HAVE HAD CHIP REPROGRAMMED AT DEALERSHIP (WAS CHARGED) AND ALSO HAD TRANSMISSION FLUSHED AN…
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2006 MERCURY MOUNTAINEER SHIFTS HARD WHEN GOING INTO REVERSE, AND IS ALSO STARTING TO SHIFT HARD FROM 2ND TO 3RD GEAR. HAVE HEARD FROM MANY THERE PEOPLE WITH 2006 FORD EXPLORERS THAT THERE IS A MANUFACTURER DEFECT IN THE TRANSMISSION. HAVE HAD CHIP REPROGRAMMED AT DEALERSHIP (WAS CHARGED) AND ALSO HAD TRANSMISSION FLUSHED AND IT IS ACTUALLY WORSE NOW. MY MOUNTAINEER HAS 58,000 MILES ON THIS AND HAS BEEN DOING THIS FOR THE PAST 2,000 MILES. FORD SHOULD FIX THIS ISSUE. *TR
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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