There are 7 owner-reported engine complaints for the 2007 Mercury Mountaineerin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
If you set cruise control while driving under 45 mph the engine shuts off.
CAR RAN ROUGH & HESITATED/SURGED UPON ACCELERATION. APPARENTLY THIS IS A COMMON FORD PROBLEM INVOLVING PREMATURE SPARK PLUG BREAK DOWN IN THE FORD TRITON ENGINE SEE FORD SPARK PLUG CLASS ACTION SETTLEMENT. SHULTZ FORD IN NANUET NY DIAGNOSED THE PROBLEM AS FAULTY PLUGS, THERE WAS ALSO A RISK OF BREAKING PLUGS UPON REMOVAL. I HAD THEM DO THE REPAIRS AT A COST OF $788. LATER I FOUND THAT THERE WAS A SETTLEMENT, HOWEVER MY CAR WAS NOT INCLUDED EVEN THOUGH IT HAD THE SAME ENGINE AS THE CARS/TRUCKS/ SUV'S THAT WERE INCLUDED IN THE SETTLEMENT. FORD CUSTOMER SERVICE SAID THERE WAS NOTHING THEY COULD DO RE: REIMBURSING ME FOR THE REPAIR EXPENSE AS MY SUV WAS NOT INCLUDED IN THE SETTLEMENT. THEY SUGGESTED I FILE THIS COMPLAINT. CAN I GET SOME SATISFACTION?
A REPAIR SHOP TOLD ME THAT MY ENGINE WAS LEAKING COOLANT THAT COULD MAKE THE ENGINE RUN HOT AND FAIL. AFTER DOING SOME ONLINE RESEARCH, I FOUND THAT THIS IS A COMMON PROBLEM WITH THESE VEHICLES AS FORD USED A CHEAP PLASTIC PART WHICH EASILY CRACKS AND ALLOWS COOLANT TO LEAK. THE LEAK ALSO AFFECTS OTHER PARTS OF THE ENGINE CAUSE THEM TO PERFORM IMPROPERLY. FORD IS AWARE OF THIS PROBLEM BUT HAS FAILED TO ISSUE A RECALL DESPITE THEIR KNOWLEDGE AND THE RISKS TO THE CONSUMER.
TL* THE CONTACT OWNS A 2007 MERCURY MOUNTAINEER. THE CONTACT STATED WHILE DRIVING 40 MPH THE VEHICLE STALLED WITHOUT WARNING. THE VEHICLE WAS TOWED TO THE DEALER FOR INSPECTION AND THEY STATED THAT THE ENGINE OVERHEATED AND NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 90,000. THE VIN WAS UNAVAILABLE.
I AM THE OWNER OF A 2007 MERCURY MOUNTAINEER. IT HAS ABOUT 64,000 MILES ON IT, MOST OF THEM HIGHWAY MILES. I HAVE A LEAK IN MY RADIATOR. THE DEALER SAYS IT IS A DEFECT IN THE RADIATOR, AND NO CORROSION IS PRESENT. IT IS OUT OF WARRANTY, SO I MUST BEAR THE COST OF REPLACEMENT OF THE RADIATOR. COST ~$700. I DO NOT DRIVE OFF ROAD, SO THERE IS NO VALID REASON THE RADIATOR SHOULD HAVE FAILED. DURING AN INTERNET SEARCH, I DISCOVERED THIS IS A COMMON PROBLEM WITH 2006 AND 2007 MERCURY MOUNTAINEERS AND FORD EXPLORERS. THIS ISSUE SHOULD BE INVESTIGATED, AND FORD HELD ACCOUNTABLE FOR PUTTING DEFECTIVE PARTS IN THEIR VEHICLES. *TR
I HAVE A 2007 MERCURY MOUNTAINEER WITH 42,000 MILES ON IT AND WAS NOTIFIED BY MY DEALERSHIP THAT THERE IS A LEAK IN THE RADIATOR AND IT NEEDS TO BE REPLACED. MY DEALERSHIP TOLD ME THIS WAS COMMON PROBLEM WITH MOUNTAINEERS BUT FORD WILL NOT STAND BEHIND THE EQUIPMENT. *TR
MY TRANSMISSION JERKS AS I ACCELERATE DURING TRAVEL. TO ME IT'S GETTING WORSE. I HAVE HAD IT LOOKED AT. NO CODES ARE SHOWING THAT I HAVE A PROBLEM. BUT CLEARLY SOMETHING IS WRONG. I HAVE DONE THIS SEVERAL TIMES, STILL NO CODES TO INDICATE ANYTHING IS WRONG WITH MY VEHICLE. ALSO MY GAS SENSORS ARE SHOT. ENGINE LIGHT GOES IN AND OUT. MY VEHICLE HAS STOPPED IN THE MIDDLE OF ATLANTA TRAFFIC, CAUSING PROBLEMS OF OTHER VEHICLES TRAVELING IN THE DIRECTION THAT I AM WITH CHILDREN. I ALSO HAVE THE PROBLEM WITH BACKING MY VEHICLE, IT JERKS BEFORE BACKING. *TR
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026