There are 10 owner-reported fuel system complaints for the 2006 Mercury Grand Marquisin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
WHILE ENTERING ONTO THE WOODROW WILSON BRIDGE FROM I-295S ON 2/1/2018, I PULLED INTO THE CENTER LANE AND BACKED OFF THE GAS PEDAL, BUT THE CAR CONTINUED TO ACCELERATE ON ITS OWN. LUCKILY THE TRAFFIC WAS LIGHT, AFTER HITTING THE BRAKE AND THE OFF BUTTON FOR THE CRUISE CONTROL, TO NO EFFECT, I WAS ABLE TO PULL INTO THE RIGHT LANE AND TURN THE CAR OFF. WHILE STILL IN MOTION, I TURNED THE KEY BACK ON AND EVERYTHING WAS NORMAL AGAIN. SINCE IT WASN'T A CRUISE CONTROL ISSUE, IT WOULD APPEAR IT IS SIMILAR TO THE TOYOTA PROBLEM WITH THE DRIVE BY WIRE ISSUE.
TL* THE CONTACT OWNS A 2006 MERCURY GRAND MARQUIS. WHILE IDLING AT A STOP SIGN, THE CONTACT OBSERVED FUEL LEAKING FROM THE VEHICLE WITHOUT WARNING. IN ADDITION THE CONTACT OBSERVED CORROSION ON ONE OF THE TWO FUEL TANK STRAPS AND IT WAS ALSO FRACTURED. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 90,000.
STRAPS HOLDING THE FUEL TANK BROKE DUE TO RUST. THE TANK FELL OFF. THE RIGHT SIDE OF THE TANK WAS RESTING ON THE GROUND, THE LEFT SIDE HELD UP BY THE FILLER TUBE ONLY.THIS HAPPENED WHILE VEHICLE WAS PARKED IN DRIVEWAY OVERNIGHT. COULD HAVE HAD VERY SERIOUS CONSEQUENCES IF IT HAPPENED WHILE MOVING.
TL* THE CONTACT OWNED A 2006 MERCURY GRAND MARQUIS. WHILE THE VEHICLE WAS PARKED, THE CONTACT NOTICED THAT THE PASSENGER SIDE FUEL TANK WAS CLOSE TO THE GROUND. UPON INSPECTION, IT WAS EVIDENT THAT THE PASSENGER SIDE FUEL TANK STRAP FRACTURED DUE TO CORROSION. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC TO BE REPAIRED. THE VEHICLE WAS REPAIRED. THE DEALER AND MANUFACTURER WERE NOT NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 130,000. THE VIN WAS NOT AVAILABLE.
MY HUSBAND NOTICED (THE WEEK OF AUGUST 11TH 2014 THAT OUR GAS TANK WAS HANGING LOOSE, ONLY HELD UP BY THE FILLER HOSE. THE STRAPS HAD RUSTED OUT. HE HAD JUST FILLED UP THE TANK APPROX. A DAY OR TWO BEFORE HE NOTICED THE GAS TANK HANGING DOWN.WE HAD TO HAVE A TOW TRUCK TAKE IT TO THE MECHANIC FOR FEAR OF SPARKS CAUSING AN EXPLOSION. MANY OLDER PEOPLE HAVE THIS CAR AND IT WOULD BE HORRIBLE IF THEY DIDN'T NOTICE SOMETHING LIKE THIS AND DROVE IT ON EXPRESSWAY WITH THE TANK HANGING. WE ALSO REPORTED TO FORD MTR. CO. QUITE SOME TIME AGO THAT THE GAS PEDAL IS CLOSE TO THE BRAKE AND THAT CAUSES YOUR FOOT TO BE PARTIALLY ON THE BREAK AND THE GAS PEDAL. THE CAR RACES A LITTLE WAYS AHEAD UNTIL YOU REALIZE WHAT IS HAPPENING. WE REPORTED THIS QUITE SOME TIME AGO TO LINCOLN MERCURY BUT NO ONE DID ANYTHING ABOUT IT. THE GAS TANK IS THE MOST WORRISOME OF THE TWO DEFECTS. WE DID REPORT THIS TO FORD MTR. CO, TODAY 08/20/2014. THANK YOU VERY MUCH. I HOPE YOU ARE AS CONCERNED AS WE ARE. AS FOR THE BREAK AND GAS PEDAL LINCOLN MERCURY DEALER SEEMED TO KNOW THIS HAPPENS. *TR
TL* THE CONTACT OWNS A 2006 MERCURY GRAND MARQUIS. THE CONTACT STATED THAT THE FUEL TANK STRAP WAS BEING HELD BY ONLY ONE STRAP WHICH WAS CORRODED. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC, WHO CONFIRMED THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 96,000. THE VIN WAS NOT AVAILABLE. UPDATED 8/28/14*CN
ON 6/1/14 I WAS DRIVING SOUTH ON SR44 IN OHIO NEAR LAKE PUNDERSON AND FOLLOWING A FARMER DRIVING A FARM TRACTOR.WHEN I GOT A CHANCE TO PASS HIM I ACCELERATED TO KICK IN THE PASSING GEAR AND WHEN I CLEARED HIM AND LEFT OFF THE THROTTLE IT DID NOT RESPOND INSTEAD IT CONTINUED AT A HIGH SPEED FOR A FEW SECONDS BEFORE LETTING OFF.I THOUGHT MAYBE THE THROTTLE GOT CAUGHT ON MY CAR MAT. I VERY RARELY PUSH THE THROTTLE TO THE FLOOR. THEN YESTERDAY 8/20/14 I WAS WITH MY FAMILY TRAVELING NORTH ON I-77 IN AKRON OHIO AND AGAIN I KICKED THE CAR INTO PASSING GEAR TO PASS AND THIS TIME IT ACCELERATED AND DID NOT RETRACT ON MY LETTING OFF. I SLID THE SHIFTER INTO NEUTRAL AND PLACED MY FOOT UNDER THE PEDAL AND LIFTED UP AND IT CAME UP BUT I THOUGHT I FELT SOME RESISTANCE WITH THE PEDDLE.I CONTINUED ON TO MY DESTINATION ONLY A FEW MILES TO COPLEY OHIO.I PARKED THE CAR TURNING OFF THE ENGINE AND SLID THE SEAT BACK AND ON MY KNEES IN THE DRIVEWAY I REACHED IN WITH MY RIGHT HAND AND PUSHED THE PEDDLE ALL THE WAY IN AND LET GO OF IT AND TO MY SURPRISE IT REMAINED IN THE FULL THROTTLE POSITION. I THEN PULLED THE THROTTLE BACK AND FELT RESISTANCE. I PUSHED IT BACK IN AGAIN AND IT STUCK BUT CAME BACK WITH LESS RESISTANCE SO I PUMPED IT BACK AND FORTH AND GOT RID OF THE STICKING PROBLEM.I THEN THOUGHT IT MAY OF DEVELOPED SOME LIGHT RUST ON THE LINKAGE SO I LOOKED UP UNDER THE DASH AND THERE IS NO PLACE TO LUBRICATE THAT'S WHEN I REALIZED I REALLY HAD A PROBLEM AND POSSIBLY A LOT OF PEOPLE OWNING A SIMILAR CAR.AS OF THIS WRITING I WENT OUT TO THE CAR IN THE GARAGE AND REACHED IN AND PUSHED THE THROTTLE TO THE FLOOR AND IT CAME BACK NICELY.A LOT OF PEOPLE WILL NOT REACT AS I DID AND SHIFT INTO NEUTRAL. *TR
TL* THE CONTACT OWNS A 2006 MERCURY GRAND MARQUIS. WHILE THE VEHICLE WAS PARKED, THE CONTACT NOTICED THAT THE FUEL STRAPS WERE PARTIALLY DETACHED FROM THE VEHICLE.THE VEHICLE WAS TAKEN TO THE DEALER WHERE IT WAS DIAGNOSED THAT THE FUEL STRAPS WERE CORRODED AND NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 90,000. UPDATED 1/15/16 *CN *CN
TL* THE CONTACT OWNS A 2006 MERCURY GRAND MARQUIS. THE CONTACT STATED THAT THE FUEL TANK SAFETY STRAP WAS COVERED WITH RUST AND THE FUEL TANK WAS BEING HELD BY ONE STRAP. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHO STATED BOTH FUEL TANK STRAPS NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE DEFECT. THE APPROXIMATE FAILURE MILEAGE WAS 102,000.
IMMEDIATELY AFTER FILLING THE FUEL TANK, WHILE STOPPED AT AN INTERSECTION, THE FUEL TANK FELL OUT OF THE VEHICLE. INVESTIGATION HAS REVEALED THAT BOTH STRAPS HOLDING THE FUEL TANK INTO THE VEHICLE HAVE FAILED DUE TO RUST AND CORROSION. THE FAILURE IS APPROXIMATELY 3-4 INCHES FROM THE STRAPS REAR ATTACHMENT POINTS. THE ONLY THING PREVENTING THE TANK FROM COMPLETELY SEPARATING FROM THE VEHICLE IS THE FILLER TUBE WHICH IS HOLDING THE DRIVERS SIDE OF THE FUEL TANK IN RELATIVE POSITION WITH APPROXIMATELY A 3IN DROP. THE PASSENGERS SIDE HAS COMPLETELY DROPPED AND IS RESTING ON THE GROUND. I BELIEVE THE TANK STRAPS ARE DEFECTIVE BECAUSE WHILE THERE IS SOME EVIDENCE OF RUST TO OTHER COMPONENTS IN THE VICINITY OF THESE STRAPS, NONE OF THEM HAVE ANYWHERE NEAR THE DEGREE OF RUST THE STRAPS HAVE. BOTH STRAPS HAVE RUSTED THROUGH AND FAILED ALLOWING THE FUEL TANK TO SEPARATE AND FALL TO THE GROUND ON THE PASSENGER'S SIDE. FORTUNATELY THIS OCCURRED AT A STOP, HAD THIS OCCURRED AT SPEED THERE IS A HIGH POTENTIAL FOR A CATASTROPHIC FUEL FIRE WHICH COULD HAVE RESULTED IN INJURY OR DEATH. *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