Problems · by component
2006 Mercury Grand Marquis vehicle speed control problems
37 owner complaints to NHTSA about the 2006 Mercury Grand Marquis cite vehicle speed control, 26% of all 143 complaints for this model year.
Complaints
37
26% of all complaints
Crashes
8
Reported by owners
Fires
1
Reported by owners
Injuries
5
Reported by owners
What owners say about the vehicle speed control
Verbatim from NHTSA complaints, newest first
“AS I WAS DRIVING. 35MPH MY FRONT WHEEL ON THE DRIVER SIDE HAD SNAPPED OFF CAUSING MY VEHICLE TO CRASH INTO A PARKED VEHICLE. LONG STORY SHORT. I'M GOING THRU A FINANCIAL CRISIS. MY CAR WAS TOWED BY AAA TO MY HOUSE. I NOTIFIED MY INSURANCE COMPANY. WHY DID THE POLICE TOW MY CAR AWAY FROM MY HOUSE? SOMEBODY NEEDS TO TAKE CARE OF THIS BECAUSE I CAN'T. TRANSPORTATION IS ESSENTIAL TO ME. PLEASE I NEED HELP. *TR”
“THE VEHICLE ACCELERATED ON IT'S OWN WHILE STOPPED WITH THE BRAKE DEPRESSED. ONCE IN A PARKING LOT WAITING FOR A SPOT TO CLEAR.THE SECOND TIME WHILE SITTING AT A RED LIGHT. I HELD THE BRAKE DOWN AS HARD AS I COULD WHILE THE CAR DID A BURN OUT AND I NOTICED THE TRACTION LIGHT COME ON. IT THEN JUST WENT BACK TO NORMAL. THIS IS VERY DANGEROUS. SOMEONE IN FRONT OF THE CAR (ANOTHER DRIVER OR PEDESTRIAN) CAN SERIOUSLY GET HURT OR KILLED.”
“THE VEHICLE ACCELERATION BY IT SELF AND COULD NOT STOP IT. PROPELLED THRU THE. BRAKES AND WOULD NOT STOP. WE ARE TAKING CAR TO FORD DEALER. THE CAR ENGINE WAS STOPPED AND RESTARTED RUN OK. NOT SURE IF A RECALL ABOUT THIS YR. WITH THIS PROBLEM?”
“TL* THE CONTACT OWNS A 2006 MERCURY GRAND MARQUIS. WHILE DRIVING 45 MPH, THE VEHICLE ACCELERATED INDEPENDENTLY. THE CONTACT DEPRESSED THE BRAKE PEDAL, BUT THE VEHICLE DID NOT STOP. THE CONTACT WAS ABLE TO PLACE THE VEHICLE IN NEUTRAL AND DEPRESS THE BRAKE PEDAL IN ORDER TO STOP THE VEHICLE. THE VEHICLE WAS NOT TAKEN TO BE DIAGNOSED OR REPAIRED. THE FAILURE WAS INTERMITTENT. THE DEALER WAS NOT CONTACTED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 170,000.”
“TL* THE CONTACT OWNS A 2006 MERCURY GRAND MARQUIS. WHILE DRIVING INTO A PARKING SPACE AT APPROXIMATELY 5 MPH, THE BRAKE PEDAL WAS DEPRESSED AND THE VEHICLE UNINTENDEDLY ACCELERATED AND CRASHED INTO THE SIDE OF A CONCRETE BUILDING. THERE WERE NO INJURIES AND A POLICE REPORT WAS FILED. THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC WHERE THE FRONT END DAMAGES WERE REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 45,800.”
“TL* THE CONTACT OWNS A 2006 MERCURY GRAND MARQUIS. THE CONTACT STATED THAT WHILE DRIVING AT VARIOUS SPEEDS, THE VEHICLE ACCELERATED INDEPENDENTLY WITHOUT WARNING. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC BUT THE FAILURE WAS UNABLE TO BE DETERMINED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS UNKNOWN.”
Showing 6 of 37 reports. Read every report on NHTSA.gov.
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 9, 2026NHTSA vehicle page
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.