NHTSA Owner Complaint Log
This page lists owner-reported complaints filed with NHTSA for the 2006 Mercury Mountaineer. Complaints are unverified consumer reports submitted to NHTSA and do not by themselves prove a defect or defect rate.
MY 2006 MERCURY MOUNTAINEER HAS A PROBLEM WITH THE A/C FAN UNIT. THE A/C FAN WILL NOT DECREASE IN BLOWER INTENSITY EVEN IF MANUALLY DOWNGRADING THE FAN OR TURNING UP THE TEMPERATURE. DOES NOT MATTER WHETHER YOU ARE IN AUTO OR MANUAL A/C MODE. *TR
2006 MERCURY MOUNTAINEER. THE TRANSMISSION HAS PROBLEMS. IT PUNCHES IN AND OUT OF GEARS, MAKES A LOUD GRINDING NOISE AND PULLS THE CAR TO THE LEFT. IT HAS PROBLEMS GOING INTO REVERSE. IT DOES NOT HAPPEN ALL THE TIME BUT I WOULD SAY ABOUT 3 TO 4 TIMES A WEEK. IT IS NOT SAFE TO DRIVE WHEN THE CAR DOES THIS. I AM DRIVING MY 1 YEAR OLD IN THIS CAR AND I HAVE TO CONCENTRATE SO HARD TO MAKE THE CAR GO STRAIGHT AND TO PUT MINIMAL PRESSURE ON THE GAS PEDAL SO IT DOESN'T JERK US TOO HARD. IT IS AT THE DEALERSHIP NOW AND FROM WHAT I HAVE READ ONLINE THEY WILL TRY TO PUT A BANDAID ON THE PROBLEM UNTIL THE WARRANTY RUNS OUT! THIS CAR ONLY HAS 26,000 MILES ON IT! I JUST BOUGHT IT USED ABOUT 8 MONTHS AGO. *TR
WHEN I STOP MY TRANNY KICKS AND IT FEELS LIKE I GOT HIT IN THE REAR. I TOOK IT TOO FM DEALER AND THEY ADJUSTED THE COMP, BUT DIDN'T FIX THE PROB. IT GOT WORSE. *TR
MY 2006 MERCURY MOUNTAINEER HAS INTERMITTENTLY JOLTED OR LURCHED FORWARD WHEN STOPPING FOR LIGHTS AND STOP SIGNS AFTER SPEEDS OVER 30 MPH. HASN'T GOTTEN AWAY FROM ME BUT FEELS AS IF I AM GOING TO HIT SOMETHING OR SOMEONE AHEAD OF ME. EXTREMELY SCARY WHEN PEOPLE ARE IN CROSS WALK. I TOOK MY CAR TO THE FORD DEALER SHORTLY AFTER BUYING IT USED. THE DEALER CHECKED IT OUT AND DENIED IT WAS HAPPENING. THAT WAS YEARS AGO AND TONIGHT I SAW NUMEROUS COMPLAINTS ON ANOTHER WEBSITE ABOUT THIS PROBLEM. WAS LOOKING BECAUSE NOW I AM GETTING A GRINDING NOISE FROM MY WHEELS WHICH PERSISTS AFTER A BRAKE JOB THAT DIDN'T FIX IT AS I THOUGHT. BOTH PROBLEMS ARE SEPARATE BUT I SEE A PATTERN OF THEM ON THIS VEHICLE NOW. *TR
TL*THE CONTACT OWNS A 2006 MERCURY MOUNTAINEER. THE CONTACT STARTED THE VEHICLE AND IT IMMEDIATELY STALLED. THE VEHICLE WAS TOWED TO A LOCAL DEALER AND THEY STATED THAT THE ENTIRE COMPUTER SYSTEM FAILED AND WAS REPLACED. TWO MONTHS LATER, THE ENGINE LIGHT ILLUMINATED. SHE TOOK THE VEHICLE TO THE DEALER AND THEY STATED THAT THERE WAS EMISSION FAILURE. THE CONTACT ALSO BEGAN EXPERIENCING FAILURES WITH THE FRONT PASSENGER WINDOW AND THE FRAME WAS REPLACED. THE ENGINE LIGHT STILL CONTINUED TO ILLUMINATE AND THE DEALER STATED THAT IT WAS DUE TO THE CATALYTIC CONVERTER, IN ADDITION TO THE TRANSMISSION. THE DEALER DID NOT KNOW HOW TO REPAIR THE FAILURES. THE CURRENT MILEAGE WAS 1,500 AND FAILURE MILEAGE WAS 411.
TRANSMISSION KICKS FROM 2ND GEAR TO 1ST GEAR WHEN COMING TO A STOP. IT IS INTERMITTENT AND JARRING TO THE VEHICLE AND PASSENGERS. THE VEHICLE WAS TAKEN IN FOR REPAIR TO AN AUTHORIZED DEALERSHIP. THE TRANSMISSION FLUID WAS CHANGED AND THE COMPUTER WAS REFLASHED, HOWEVER THE PROBLEM WITH THE SHIFT SHOCK CONTINUES.*CN
2006 MERCURY MOUNTAINEER HAS TRANSMISSION PROBLEMS. CONSUMER STATES THAT HIS VEHICLE HAS BEEN SERVICE SEVERAL TIMES BUT THE PROBLEM IS NOT FIXED. *NJ THE CONSUMER STATED THE TRANSMISSION WOULD SLIP, MOST NOTICEABLY IN FRIGID TEMPERATURES. *JB
TRANSMISSION PROBLEMS THAT RESULTED AFTER RECALIBRATION IN RESPONSE TO RECAL NOTICE. VEHICLE NOW LURCHES FORWARD BY ITSELF WHEN STOPPED AT A TRAFFIC LIGHT. ONE NEEDS TO STAND ON THE BRAKES TO PREVENT VEHICLE FROM STRIKING OTHER VEHICLES.
BOUGHT THIS MERCURY MOUNTAINEER MARCH 2007. WORSE VEHICLE EVER OWNED. MOST OF THE TIME WHEN STOPPING I GET THAT THUD NOISE. I FEEL LIKE I GOT HIT FROM THE BEHIND. WHEN IN TRAFFIC I WORRY ALOT ALSO. I BOUGHT THIS TRUCK IN 7 TIMES AND PROBLEM STILL OCCURS. DEALERSHIP WILL NOT FIX IT UNTIL I SHOW THEM THE PROBLEM. I TOLD THEM IT DOES NOT HAPPEN EVERYDAY. WITH MY LUCK IT DID NOT HAPPEN WHEN I WAS THERE. *TR
VEHICLE STALLS AT RANDOM WHILE MY FOOT IS ON THE GAS, BEEN IN THE SHOP NOW 4 TIMES AND NO ONE CAN FIND ANYTHING WRONG
TL*THE CONTACT OWNS A 2006 MERCURY MOUNTAINEER. ON A SNOWY DAY AFTER DRIVING THE VEHICLE THE DRIVER NOTICED THAT THE BACK REAR DOOR WINDOW WAS BROKEN. THE CONTACT STATED THAT THERE WAS NO PREVIOUS CRACKS OR EVIDENCE OF CRAKS IN THE WINDOW. THE LOCAL DEALER INFORMED HER THAT SHE WAS RESPONSIBLE FOR THE REPAIRS. ON 4/12/07 THE DEALER INFORMED HER THAT THE HYDRAULIC VALVE THAT KEPT THE WINDOW OPEN AND THE HEAD OF IT WAS CRACKED. THE DEALER STATED THAT THE FAILURE COULD HAVE CAUSED THE WINDOW TO BREAK. THE CURRENT MILEAGE WAS 33,100, AND THE FAILURE MILEAGE WAS 33,001. *AK
I BOUGHT MY 2006 MERCURY MOUNTAINEER APRIL 26, 2006. I STARTED HAVING THE TRANSMISSION PROBLEMS DECEMBER 2006. WHEN YOU PUT ON BREAKS TO STOP YOU HEAR A THUD AND THE VEHICLE WILL ACTUAL THROW YOU FORWARD IN THE SEAT. IT FEELS LIKE YOU MIGHT NOT ACTUALLY STOP WHEN IT FIRST HAPPENS. THIS HAPPENS DAILY. THE FIST TIME I TOOK THE VEHICLE IN AND LEFT IT WITH THEM, THEY DROVE IT AND SAID THEY DID NOT FIND ANYTHING. JANUARY 2007 I TOOK THE CAR BACK TO THEM AND THEY DID DIVE IT AND HAVE THE SAME PROBLEM. THE CALLED FORD AND FORD TOLD THEM THERE WAS A RECALL ON IT AND THEY NEEDED TO PUT IT ON THE COMPUTER AND DO A RECALIBRATING. THEY DID THIS AND THE PROBLEM WAS GONE FOR A WEEK AND IT RETURNED. I TOOK IT BACK TO THEM AND THEY REPLACED A PART IN THE TRANSMISSION, THIS LASTED A WEEK AND IT STARTED THE SAME THING AGAIN. I AM NOW STILL FUSSING WITH THEM ABOUT GETTING IF FIXED. THEY KEPT IT 5 DAYS LAST WEEK AND DID NOTHING TO IT. I HAD AN APPOINTMENT WITH A FORD REP. LAST WEEK AND THIS PAST WEEK AND HE DID NOT SHOW FOR EITHER APPOINTMENT. *TR
THE TRANSMISSION IN MY 2006 MERCURY MOUNTAINEER HAS "POPPED" INTO REVERSE TWICE ONCE IT WAS PLACED INTO PARK, CAUSING IT TO ROLL BACKWARDS. IT ALSO ROLLS FORWARD AND BACKWARDS WHEN PLACED IN PARK UNTIL IT "CATCHES" AND FINALLY LOCKS IN PLACE. WHEN CLIMBING HILLS OR STEEP GRADES, THE TRANSMISSION WILL SURGE, AND WHEN COMING TO A STOP, THE TRANSMISSION WILL SHIFT HARD AND JERK. *NM
THE VEHICLE STALLS IN DRIVE WITHOUT WARNING. THE DEALERSHIP HAS BEEN UNABLE TO DETERMINE AND FIX THE PROBLEM.
TL*THE CONTACT RENTED A 2006 MERCURY MOUNTAINEER. WHILE MAKING A LEFT TURN AT APPROXIMATELY 5-10 MPH, THE CONTACT APPLIED TOO MUCH PRESSURE TO THE ACCELERATOR PEDAL AND THE VEHICLE SPED FORWARD. THE CONTACT APPLIED THE BRAKES AND THE EMERGENCY BRAKE, BUT THE VEHICLE DID NOT DECELERATE OR STOP. THE VEHICLE CRASHED INTO FOUR PARKED VEHICLES. BOTH PASSENGERS WERE TRANSPORTED TO THE HOSPITAL, BUT ONLY THE FRONT PASSENGER, WHO WAS WEARING A SEAT BELT, SUFFERED BRUISES AND SORENESS. A POLICE REPORT WAS FILED. THE VEHICLE WAS DESTROYED AND TOWED. THE VIN, POWERTRAIN, ENGINE SIZE, PURCHASE DATE, AND NUMBER OF CYLINDERS WERE UNKNOWN. THE CURRENT AND FAILURE MILEAGES WERE 6,000.
VEHICLE WOULD NOT SHIFT GEARS. 4 RPMS AT 25 MPH. VEHICLE SLOWED. PULLED OVER AND FRONT BRAKES WERE ON FIRE. *AK
I RECEIVED MY VEHICLE 1/18/2006 A MERCURY MOUNTAINEER. ON MY SURVEY THAT I RETURNED TO FORD IN MARCH OF 2006, I TOLD THEM THAT I HATED THEIR " SLIP-O-MATIC " TRANSMISSION. I DO NOT HAVE ALL THE VISITS DOCUMENTED BUT THE SECOND PROBLEM WE HAD WAS THE VEHICLE WOULD COME TO A STOP AT A STOP LIGHT AND THEN A FEW SECONDS LATER YOU WOULD FEEL A "THUD" LIKE YOU WERE HIT FROM BEHIND BY ANOTHER VEHICLE. WE HAD THE TRANSMISSION REPROGRAMMED AND THE VALVE REPLACED AND THAT PROBLEM SEEMED TO BE RESOLVED. BUT THE SLIPPING THROUGH THE GEARS CONTINUED TO BE A PERSISTENT PROBLEM. IT IS ALMOST AS IF WHEN YOU PULL OUT INTO THE HIGHWAY THAT YOU ARE IN SUSPENDED ANIMATION FOR 1 TO 1.5 SECONDS. THIS IS PARTICULARLY UNSETTLING WHEN CROSSING SEVERAL LANES OF TRAFFIC FROM A STOPPED POSITION... LIKE PULLING OUT OF A GAS STATION (WITH THE TRAFFIC) WHILE A SEMI IS COMING UP BEHIND YOU REAL FAST OR TURNING ACROSS TRAFFIC WITH OUT THE GREEN ARROW AND YOU REALLY HAVE TO GET ACROSS QUICKLY SOMETIMES IT WORKS SOMETIMES IT DOESN'T. THIS OCCURS RANDOMLY BUT YET APPROXIMATELY 10 TO 20 TIMES A WEEK. RIGHT NOW THE SUV IS IN THE SERVICE CENTER. I HAVE REQUESTED THE NEXT REPAIR TO BE PERFORMED VIA TSB 07-13-8 BUT THE DEALER IS INSISTING THAT I MUST DEMONSTRATE THE PROBLEM BEFORE THEY WILL REPAIR IT PER ABOVE MENTIONED TSB....... THEY TOOK MY WORD BEFORE FOR THE REPROGRAMMING AND THE VALVE REPLACEMENT BUT NOW THEY DO NOT SEEM TO BELIEVE ME ANYMORE. *JB
Data synced from NHTSA on May 4, 2026