There are 14 owner-reported speed control & cruise complaints for the 2004 Mercury Mountaineerin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
ENGINE DIED HAS REPEATED ONLY A FEW TIMES AT OR ABOVE 50MPH OVER SPAN OF TIME
THIS IS NOT THE FIRST TIME THIS HAS HAPPENED! WE WERE DRIVING WHEN MY HUSBAND SET THE CRUISE CONTROL AND IT STALLED OUR VEHICLE! HE SET IT FOR 45 MPH AND IT JUST SHUT THE CAR DOWN! THIS IS NOT THE FIRST TIME THIS HAS HAPPENED WE SET IT FOR 35 MPH AND IT STALLED THE VEHICLE WE NOTIFIED THE COMPANY WE GOT THE CAR FROM AND THEY TOLD US THERE WAS NOTHING WRONG WITH IT WHEN THEY DROVE IT AND SET THE CRUISE CONTROL! WE TOLD THEM THAT IT HAPPENED SEVERAL TIMES! AND I REFUSE TO PAY FOR SOMETHING NOW THAT MY CAR IS NO LONGER UNDER WARRANTY WHEN THE PLACE I GOT THE SUV FROM WAS AWARE OF THE ISSUE, I SEEN THAT THERE WERE A LOT OF OTHER COMPLAINTS ABOUT THIS HAPPENING, WHAT IS MERCURY WAITING FOR? SOMEONE TO GET KILLED!! *TR
USING CRUISE CONTROL GOING DOWN A SLIGHT GRADE THE ENGINE DIED. THIS HAS HAPPENED MULTIPLE TIMES IN THE LAST FEW MONTHS, SO NOW I KNOW TO PUT THE VEHICLE IN NETURAL WHILE STILL MOVING AND RE-START THE ENGINE, THEN PULL BACK DOWN INTO DRIVE. THIS ISN'T EASY TO DO, SO BE CAREFUL NOT TO PUT IN REVERSE OR PARK WHILE TRYING TO RE-START THE ENGINE. *TR
TL* THE CONTACT OWNS A 2004 MERCURY MOUNTAINEER. THE CONTACT STATED THAT WHILE TRAVELING 45 MPH WITH THE CRUISE CONTROL ACTIVATED THE VEHICLE STALLED WITHOUT WARNING. THE VEHICLE WAS TAKEN TO A PRIVATE MECHANIC WHERE IT WAS FOUND THAT THE CRUISE CONTROL SWITCH NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS CONTACTED ABUT THE FAILURE. THE FAILURE AND CURRENT MILEAGE WAS 138,800. UPDATED 06/17/14*LJ UPDATED 8/25/2017*CN
TO FORD MOTOR COMPANY (FMC) VIA WEBSITE: YOUR INQUIRY: HAS ANY MECHANIC EVERY CAME ACROSS A SITUATION SIMILAR TO MY 2004 MOUNTAINEER CRUISE CONTROL PROBLEM AS FOLLOWS: EVERY TIME I SET THE CRUISE CONTROL BETWEEN 27-45MPH AND DESCEND A HILL, THE ENGINE SHUTS DOWN! THAT'S RIGHT; NO POWER STEERING, NO POWER BRAKES, NO ENGINE RUNNING! THIS IS DEFINITELY A SAFETY/WARRANTY ISSUE TO ME? THE MERCURY SERVICE MANAGER SAID THAT HE NEVER HEARD OF SUCH A PROBLEM AND IT'S GOING TO COST ME AT LEAST $70.00, JUST FOR HIM TO FIGURE OUT WHAT'S WRONG! FROM FMC: THANK YOU FOR CONTACTING THE FORD MOTOR COMPANY CUSTOMER RELATIONSHIP CENTER REGARDING THE CRUISE CONTROL CONCERN ON YOUR 2004 MERCURY MOUNTAINEER. I SINCERELY UNDERSTAND THE FRUSTRATION THAT THIS EXPERIENCE HAS BROUGHT YOU. PLEASE BE ADVISED THAT COMPLETE VEHICLE SERVICE RECORDS ARE MAINTAINED AT THE SERVICING DEALERSHIP ONLY. AS DEALERSHIPS ARE INDEPENDENTLY OWNED AND OPERATED, WE DO NOT HAVE ACCESS TO OTHER VEHICLES' SERVICE RECORDS; THUS, CANNOT DETERMINE IF THIS IS CONSIDERED TO BE A COMMON OCCURRENCE. MOREOVER, OUR DEALERS DETERMINE HOW THE DIAGNOSTIC FEE WILL BE APPLIED WHEN ASSIGNING TECHNICIANS TO SERVICE VEHICLES. IN THIS INSTANCE, THE $70 DIAGNOSTIC FEE THAT WAS QUOTED TO YOU AND THE MANNER IN WHICH IT WOULD APPLY, IS A STANDARD PRACTICE FOR THIS DEALERSHIP. I INVITE YOU TO SPEAK WITH THE CUSTOMER RELATIONS MANAGER OR THE SERVICE MANAGER, AS HE/SHE WOULD BE IN THE BEST POSITION TO ADDRESS YOUR DIAGNOSTIC FEE. AT THIS TIME, I RECOMMEND THAT YOUR VEHICLE BE INSPECTED BY A LINCOLN-MERCURY DEALERSHIP TO DETERMINE THE CAUSE OF ANY SYMPTOMS YOUR VEHICLE MAY BE EXPERIENCING. THEY HAVE FACTORY-TRAINED TECHNICIANS, THE MOST CURRENT ENGINEERING SERVICE INFORMATION, AND THE SPECIALIZED EQUIPMENT REQUIRED TO RESOLVE YOUR VEHICLE CONCERNS. IF THERE IS NO COVERAGE UNDER APPLICABLE WARRANTIES, RECALLS OR EXTENDED SERVICE PLANS, REPAIRS AND SERVICES WOULD BE YOUR RESPONSIBILITY. MAKE AN APPOINTMENT WITH FMC DEALER. *TR
I DROVE A 2004 MERCURY MOUNTAINEER SUV AND AS I WAS TURNING INTO THE APARTMENT COMPLEX FROM A COMPLETE STOP, THE GAS PEDAL CLAMPED DOWN & I COULDN'T GET THE BRAKE TO WORK. MY SUV WAS TOTALED & I RAN INTO A FULL-SIZED PICK-UP TRUCK, WHICH WAS TOTALED TOO. I REPORTED THE PROBLEM TO THE POLICE & MY INSURANCE COMPANY. THE INSURANCE COMPANY TOLD ME NOT TO TELL ANYONE ELSE ABOUT IT. IT WAS LATE EVENING, SO NO KIDS WERE OUT, BUT BEING UNABLE TO CONTROL MY VEHICLE, WHICH TOTALED TWO FULL-SIZED TRUCKS IS SCARY! *TR
I JUST PURCHASE A USED 2004 MERCURY MTNR...EVERYTIME I SET THE CRUISE CONTROL THE CARS LIGHTS COME ON AND GAUGES AND THE VEHICLES TURNS OFF I HAVE TO WAIT SEVERAL MINUTES BEFORE IT RESTARTS. *TR
2004 MERCURY MOUNTAINEER STALLS WHEN CRUISE CONTROL IS USED. OFTENTIMES IT SEEM RELATED TO GOING DOWNHILL OR LOWER RPMS. THIS HAS HAPPENED TO ME ON TWO SEPARATE 2004 MERCURY MOUNTAINEERS. ONE HAD A V-6 AND THE OTHER HAS A V-8. BOTH WERE THE PREMIERE EDITION. *TR
2004 MERCURY MOUNTAINEER STALLS WHEN CRUISE CONTROL IS USED. OFTENTIMES IT SEEM RELATED TO GOING DOWNHILL OR LOWER RPMS. THIS HAS HAPPENED TO ME ON TWO SEPARATE 2004 MERCURY MOUNTAINEERS. ONE HAD A V-6 AND THE OTHER HAS A V-8. BOTH WERE THE PREMIERE EDITION. *TR
DRIVER SETS CRUISE CONTROL AT 35MPH VEHICLE SPEED IS AT 35MPH FOR ABOUT 90 SECS. SUDDENLY VEHICLE'S WARNING LIGHTS COME ON. (SERVICE ENGINE SOON. BATTERY ALERT. LOW OIL PRESSURE ALERT , AND TEMP. ALERT ) VEHICLE LOSES ALL POWER. NO BRAKES, STEERING LOCKS UP, NO POWER. DRIVER (BY THE GRACE OF GOD) BRINGS VEHICLE TO SIDE OF ROAD RIGHT BEFORE A T IN THE ROAD. VEHICLES AT THE INTERSECTION CAN BE TRAVELING AT 45MPH. THERE WAS A SCHOOL BUS APPROACHING AS WELL. DRIVER TURNED ON HAZARD LIGHTS. DRIVER PHONES HUSBAND. HE HAD OUR 15 YEAR OLD SON (WHO WAS WITH ME) CHECK BELTS. THEY WERE INTACT. HE THEN ASKED ME IF I HAD USED THE CRUISE CONTROL. I THEN REMEMBERED THAT THIS HAD HAPPENED TO MY HUSBAND SEVERAL TIMES WHEN WE HAD FIRST BOUGHT THE VEHICLE. SINCE THEN HE HAS NOT SET THE CRUISE CONTROL FOR LESS THAN 40MPH. OBVIOUSLY I HAD FORGOTTEN THAT. I GOT BACK INTO THE VEHICLE AND TURNED ON THE ENGINE AND ALL WAS WELL. THIS MORNING, I CALLED THE FORD DEALERSHIP WHERE WE HAD PURCHASED THE VEHICLE. THE SERVICE MANAGER RECALLED THAT THEY HAD SERVICED A FORD EXPLORER ONE OTHER TIME WITH THE SAME PROBLEM. HE SAID THAT THERE WAS NOT ANY RECORD OF A MANUFACTURER RECALL. I TOLD HIM THAT I WANTED TO MAKE A REPORT, AS I KNEW THAT THE SITUATION YESTERDAY COULD HAVE RESULTED IN A SERIOUS ACCIDENT IF I HAD LOST POWER ANY CLOSER TO THAT INTERSECTION. HE TOLD ME TO MAKE A REPORT HERE. (BY THE WAY, I DO NOT KNOW WHAT OEM MEANS CONCERNING THE COMPONENT I LISTED. I EVEN TRIED TO LOOK IT UP IN TMY OWNERS' MANUAL AND ON THE HELP PORTION OF YOUR WEBSITE. I JUST LEFT IT MARKED "NO." ). *TR
WHEN USING THE CRUISE CONTROL THE VEHICLE DIED: ALL GAUGE LIGHTS CAME ON (BATTERY, ENGINE, ETC.) ENGINE DIED, NO POWER STEERING, ETC. HAD TO ROLL TO THE SIDE OF THE ROAD, PUT VEHICLE IN PARK OR NEUTRAL AND RESTART. THIS PROBLEM REPEATS ITSELF EVER TIME I USE THE CRUISE CONTROL. AND, I SEE THERE ARE OTHER OWNERS OF THIS MODEL THAT HAVE POSTED THE SAME COMPLAINT. PROBLEM FIRST OCCURRED IN JANUARY OF 2008 HOWEVER CONTINUES TODAY. FORTUNATELY WHEN THE ENGINE HAS DIED EVERY TIME I HAVE USED THE SPEED CONTROL IT HAS NOT CAUSED AN ACCIDENT.... YET! *TR
VEHICLE SPEED CONTROL: WHILE PREPARING TO BACK UP, BEFORE SHIFTING, VEHICLE JUMPED, AND THEN SUDDENLY ACCELERATED FORWARD, BRAKES WERE APPLIED BUT VEHICLE WOULDN'T STOP AND ENGINE WAS ROARING AS IF THE ACCELERATOR WAS STUCK. VEHICLE WENT AIRBORNE OVER AN EMBANKMENT, THROUGH A LAWN, HIT A ROCK/DEBRIS AREA, TIRE BLEW BEFORE HITTING CURVE, LANDED ON RIGHT RIM, WAS THEN ABLE TO PUT VEHICLE IN PARK. VEHICLE TOWED AWAY, DEALERSHIP CURRENTLY STATES NOTHING IS WRONG WITH THE VEHICLE. HELP!! *JB
THROTTLE POSITION SENSOR FAILED IN 2004 MERCURY MOUNTAINEER. CAR ABRUPTLY STOPPED ACCELERATING WHILE TRAVELING AND CAME TO A STOP. FORTUNATELY I WAS IN A NEAR-EMPTY PARKING LOT WHEN THIS OCCURRED. IT COULD HAVE BEEN A VERY DANGEROUS SITUATION HAD THIS OCCURRED WHILE I WAS ON THE ROAD. AFTER THE CAR CAME TO A STOP, I WAS UNABLE TO MOVE IT FORWARD FOR MORE THAN ABOUT 100 YARDS. IT HAD TO BE TOWED. DEALER DETERMINED THAT LOSS OF ACCELERATION WAS DUE TO "TP OPEN INTERMITTENT." DEALER FIXED PROBLEM. *JB
WHILE DRIVING IN 20 MPH IN CONGESTED TRAFFIC THE VEHICLE SUDDENLY ACCELERATED AND LUNGED FORWARD. OWNER HAD TO STEER THE VEHICLE OFF THE ROAD TO AVOID HITTING ANOTHER VEHICLE. OWNER SHIFTED TO PARK IN ORDER TO STOP VEHICLE. NO INJURIES OR ACCIDENT OCCURRED. *AK
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