Owner-reported complaints naming the driver-assistance system, filed with NHTSA
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Reports naming forward-collision avoidance, lane keeping, back-over prevention, cruise control and related electronic driver-assistance systems. Every record below is an owner-reported complaint about the 2008 Mercury Grand Marquis submitted to NHTSA — not a confirmed defect, not a recall and not a manufacturer bulletin. 17 reports on file name it.
Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.
Shown in the owner’s own words, exactly as filed
I WAS DRIVING IN TOWN AND SEVERAL TIMES WHEN I SLOWED DOWN TO STOP AT A STOP SIGN OR CORNER, AFTER BRAKING MY CAR ACCELERATED BY ITSELF. THE ENGINE REVVED UP AND MADE THE CAR JUMP FORWARD. I HAD TO SLIGHTLY RELEASE THE BRAKE SND BRAKE HARDER TO STOP AND AVOID GOING INTO THE INTERSECTION.
THE CAR WILL SUDDENLY AND WITHOUT WARNING ACCELERATE TO 5000 RPM'S. HAD THROTTLE BODY AND MAS REPLACED WHICH SEEMED TO HELP. HOWEVER, IT STILL HAPPENS ONCE IN A WHILE (ONCE EVERY 3 WEEKS AVERAGE). USUALLY HAPPENS AFTER SHIFTING FROM PARK TO DRIVE AND DRIVING FORWARD AT LOW SPEEDS (AROUND 5-10 MPH). HASN'T HAPPENED AT HIGHER SPEEDS. WAS TOLD BY ONE MECHANIC THAT THE COMPUTER IS DEFECTIVE???.
VEHICLE ACCELERATES SUDDENLY WITH NO WARNING ACCELERATOR STICKS
CAR SPEEDING UP WHILE BRAKING. *TR
WHEN REVERSING OUT OF DRIVEWAY CAR ACCELERATED ON ITS OWN. PRESSED BRAKES BUT CAR STILL MOVED BACKWARDS. HAVE SKID MARKS IN DRIVEWAY TO SHOW FOR IT. THREW CAR INTO NEUTRAL AND TURNED OFF ENGINE. RESTARTED AND EVERYTHING SEEMED NORMAL. DROVE CAR ON TRIP AND WHEN REDUCING SPEED TO SLOW DOWN BY PUSHING ON BRAKE CAR AGAIN ACCELERATED AND NEARLY HIT ANOTHER CAR. AGAIN THREW CAR INTO NEUTRAL AND TURNED OFF ENGINE. AND AGAIN WHEN RESTARTING CAR EVERYTHING SEEMED NORMAL AGAIN. WIFE IS EXTREMELY AFRAID OF DRIVING CAR. TOOK CAR TO DEALER WHERE IT WAS PURCHASED AND WAS TOLD THAT IT MAY HAVE BEEN THAT I PUSHED THE BRAKE AND GAS PEDAL AT THE SAME TIME, THIS HOWEVER, I BELIEVE IS NOT THE CASE. DEALERSHIP HOWEVER KEPT THE CAR FOR FURTHER INVESTIGATION AS TO WHAT THE PROBLEM MAY BE. WILL HEAR IN A DAY OR TWO. *TR
VEHICLE WAS PURCHASED USED IN JUNE, 2011. WHILE BRAKING FOR A STOP LIGHT, VEHICLE SUDDENLY ACCELERATED. HAD TO FORCEFULLY PUMP BRAKES TO STOP VEHICLE FROM HITTING VEHICLE IN FRONT. CAR RETURNED TO NORMAL OPERATION AS SOON AS I GOT IT STOPPED. HAVE HAD SIMILAR INCIDENTS A COUPLE OF TIMES BEFORE, ALTHOUGH NOT AS BAD AS THIS ONE, HOWEVER, AT THAT TIME I THOUGHT MAYBE I HAD ACCIDENTALLY PRESSED THE ACCELERATOR WHILE BRAKING. I KNOW THAT WAS NOT THE CASE THIS TIME. *TR
TL* THE CONTACT OWNS A 2008 MERCURY GRAND MARQUIS. THE CONTACT STATED THAT WHILE DEPRESSING THE BRAKE PEDAL AND DRIVING APPROXIMATELY 5 MPH, THE RPM READING INCREASED AS THE VEHICLE JERKED FORWARD. THE CONTACT STATED ALL THE WARNING LIGHTS ON THE INSTRUMENT PANEL ILLUMINATED. THE FAILURE RECURRED VARIOUS TIMES CAUSING A CRASH. THE CONTACT WAS DRIVING APPROXIMATELY 60 MPH WHEN THE VEHICLE ACCELERATED, CAUSING THE CONTACT TO CRASH INTO A GUARD RAIL AND A CONCRETE WALL. THE POLICE REPORTED TO THE SCENE AND A REPORT WAS FILED. THE VEHICLE WAS TOWED TO THE DEALER FOR DIAGNOSIS WHERE THE TECHNICIAN WAS UNABLE TO DIAGNOSE THE FAILURE. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 17,869. *TR
I WAS DRIVING ON THE INTERSTATE GOING ABOUT 65 MPH. I ACCELERATED RAPIDLY TO PASS A SEMI WHEN I WAS GETTING CLOSE TO MY EXIT. AFTER PASSING THE SEMI I LET MY FOOT OFF OF THE ACCELERATOR BUT THE VEHICLE DID NOT SLOW DOWN. I APPLIED THE BRAKE PEDAL BUT THE VEHICLE KEPT ACCELERATING FOR ABOUT 5 SECONDS. AFTER THAT I HEARD AN AUDIBLE "CLUNK" COME FROM THE ENGINE COMPARTMENT AND THE VEHICLE RETURNED TO NORMAL OPERATION. THIS IS THE SECOND TIME THIS HAS HAPPENED THE FIRST WAS A MONTH AGO ACCELERATING RAPIDLY FROM A STAND STILL POSITION. IN NEITHER CASE DID I WRECK OR GET A SPEEDING TICKET. *TR
HAD A FLAT TIRE AND HAD TO INSTALL THE SPARE TIRE THAT CAME WITH VEHICLE. AS SOON AS I GOT BACK ON THE ROAD , THE STABILITY CONTROL LIGHT, THE ABS LIGHT AND THE I-P BRAKE LIGHT CAME ON. THE CAR WOULD GET ONLY 35 MPH. FOR ABOUT 7 TO 8 MILES, THEN PICKED UP SPEED SO I COULD RUN 50 MPH. UNTIL I HAD THE TIRE REPLACED. AFTER I HAD THE TIRE REPLACED I TOOK THE CAR TO A MECHANIC TO HAVE THE SYSTEM RESET SO THE LIGHTS WOULD RETURN TO NORMAL. THE UNIT THAT CONTROLS THIS HAD TO BE REPLACED BECAUSE THE DIFFERENCE IN TIRE SIZE HAD DESTROYED THE CONTROL UNIT. IT COST ME $313.50 TO HAVE A USED UNIT INSTALLED, IF IT HAD BEEN A NEW UNIT, IT WOULD HAVE COST OVER $600. FORD MOTOR CO. SHOULD HAVE TO PAY THE COST OF THIS REPLACEMENT BECAUSE THE DAMAGE WAS CAUSED BY EQUIPMENT THAT WAS SUPPLIED WITH THE VEHICLE WHEN NEW. *TR
TL*THE CONTACT OWNS A 2008 MERCURY GRAND MARQUIS. THE CONTACT STATED THAT WHILE USING THE CRUISE CONTROL, APPLYING THE BRAKES AND RESUMING TO NORMAL THE VEHICLE SUDDENLY ACCELERATED TO HIGHER SPEEDS. THE VEHICLE STOPPED AFTER THE BRAKE PEDAL WAS APPLIED. THE VEHICLE WAS INSPECTED BY A DEALER WHO WAS UNABLE TO DIAGNOSE THE FAILURE SINCE THEY WERE UNABLE TO DUPLICATE IT. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 4,500.
TL* THE CONTACT OWNS A 2008 MERCURY GRAND MARQUIS. THE CONTACT STATED HE STARTED THE VEHICLE AND WHEN DEPRESSING THE BRAKES, THE VEHICLE ABNORMALLY ACCELERATED. THE CONTACT WAS UNABLE TO STOP THE UNINTENDED ACCELERATION AND THE VEHICLE DROVE OVER A CURB AND CRASHED INTO A SIGN. THE CONTACT AND PASSENGER BOTH SUSTAINED MINOR INJURIES TO THEIR NECKS FROM THE SEAT BELT. THE VEHICLE SUSTAINED SUBSTANTIAL FRONT END DAMAGES. THE VEHICLE WAS TOWED TO THE DEALER AND INSPECTED BUT THE CAUSE OF THE UNINTENDED ACCELERATION FAILURE WAS NOT DISCLOSED TO THE CONTACT. THE BODY DAMAGE WAS REPAIRED AND THE CONTACT TRADED THE VEHICLE FRO ANOTHER. THE FAILURE AND CURRENT MILEAGES WERE 500. UPDATED 10/01/2010. *LJ UPDATED 10/04/10
TL*THE CONTACT OWNS A 2008 MERCURY GRAND MARQUIS. AFTER DRIVING IN REVERSE AND SHIFTING INTO DRIVE FROM A STOP LIGHT THE VEHICLE SURGED FORWARD AND CRASHED INTO ANOTHER VEHICLE. A POLICE REPORT WAS NOT FILED. ONE PERSON WAS REPORTED INJURED. SMOKE WAS SEEN COMING FROM UNDER THE HOOD OF THE VEHICLE. THE VEHICLE WAS TOWED TO THE CONTACTS RESIDENCE. THE FAILURE HAD NOT BEEN DIAGNOSED BY THE DEALER. THE FAILURE AND CURRENT MILEAGES WERE 42,000.
CRUISE CONTROL, SUDDEN ACCELERATION. CAR WENT TO 80 BEFORE I COULD STOP IT VEHICLE IS A 2008 MERCURY GRAND MARQUIS LS WITH 27,500 MILES ON IT . THE DEALER REPLACED THE ECM. THIS HAPPENED TO MY WIFE ALSO AT 35 MPH WENT TO 65 BEFORE SHE STOPPED IT. *TR
I WAS PREPARING TEST DRIVE 2008 MERCURY MARQUIS AT HONOLULU FORD. I WAS STOPPED AT THE EXIT TO HOUGHTAILING ST WHEN THE ENGINE ACCELERATE. I LOOKED DOWN AND MY FOOT WAS NOT ON THE GAS IT WAS ON THE BRAKE. THE CAR STARTED TO MOVE OUT INTO THE STREET CROSSING THE ROAD HITTING ANOTHER VEHICLE AND A LIGHT POLE. *TR
UPDATE ON ODI NUMBER 10208094. ON THE DAY THE MERCURY THAT I OWN WAS RETURNED TO THE DEALER TO SOLVE THE SAFETY PROBLEM, AN ACCIDENT OCCURRED WITHIN 10 MILES OF MY HOME. THE VEHICLE WAS A LATE MODEL LINCOLN TOWN CAR. ONE PERSON WAS PRONOUNCED DEAD AT THE HOSPITAL AND THE DRIVER DIED A FEW DAYS LATER. THE FOLLOWING IS A QUOTE FROM THE NEXT DAY BREVARD COUNTY FLORIDA LOCAL NEWSPAPER (FLORIDA TODAY). ?THE TRAFFIC CIRCLE AT THE INTERSECTION OF WICKHAM ROAD AND LAKE ANDREW DRIVE WAS BEGINNING TO HUM WITH THE RUSH OF FRIDAY EVENING TRAFFIC WHEN A LIGHT BLUE SEDAN HIT THE CURB AND CRASHED THROUGH SOME BUSHES INTO A RETENTION POND.? ?SOME SAID THE CAR MADE A NOISE LIKE A ROARING FREIGHT TRAIN AS IT PLUNGED INTO THE WATER. A FEW SAID IT SHOT OFF LIKE A ROCKET.? END OF QUOTE. IT IS TIME SOME ONE PAYS ATTENTION TO THE SERIOUSNESS THIS SAFETY PROBLEM. IT IS ALMOST IMPOSSIBLE WITH THE MERCURY THAT I HAVE TO PRESS THE BRAKE AND GAS PEDAL AT THE SAME TIME. AND EVEN IF YOU DID THE GAS PEDAL WOULD ONLY SLIGHTLY BE DEPRESSED. I HAVE SEARCHED THE INTERNET AND FOUND NUMEROUS SIMILAR INCIDENTS WITH FORD MOTOR COMPANY VEHICLES. FORD MOTOR COMPANY SHOULD TELL THEIR DEALERS TO STOP THEIR SERVICE DEPARTMENTS FROM GIVING THEIR CUSTOMERS BULL CRAP AND DO THE SENSIBLE THING OF FINDING OUT WHAT IS REALLY WRONG. *TR
FALSE ACCELERATION OF 2008 MERCURY GRAND MARQUIS. ON OCT. 9TH, MY WIFE AND I AND TWO FRIENDS (FROM PA AND DE) WERE IN VEHICLE HEADED FOR DINNER. CRANKED VEHICLE AFTER SETTING FOR APPROXIMATELY 22 HOURS. ENGINE REVVED UP TO AN ESTIMATED 4000 RPM CREATED LOUD RUMBLING SOUND AND VIBRATED VEHICLE. I WAS TOO FRIGHTENED TO LOOK AT TACHOMETER. TURNED SWITCH KEY OFF. MADE 3 ATTEMPTS TO START ENGINE. FINALLY REMOVED KEY FOR APPROXIMATELY 10 TO 15 SECONDS, CAR STARTED AND SEEMED NORMAL. PROBLEM HAS NOT REOCCURRED, HOWEVER MY WIFE WILL NOT DRIVE VEHICLE. FRANKLY ALL FOUR PEOPLE IN CAR HAD A '!@#$% FRIGHTENING. THIS TOOK PLACE IN OAK RIDGE TN. ON OCT. 9, 2007. OCT.10 DROVE VEHICLE TO LINCOLN-MERCURY DEALER IN OAK RIDGE. THEY STATED THAT IF THE ENGINE SERVICE LIGHT DID NOT COME ON, THEY WOULD NOT BE ABLE TO FIND ANY PROBLEM. ON OCT. 19 VEHICLE WAS TAKEN TO ISLAND LINCOLN/MERCURY DEALER IN MERRITT ISLAND FL. (VEHICLE WAS PURCHASED THERE.) SERVICE MANAGER DROVE VEHICLE ON TEST DRIVE AND TOLD ME IN A NICE MANNER THAT I MUST HAVE HAD MY FOOT ON THE BRAKES AND GAS PEDAL AT SAME TIME. NOT TRUE. I HAVE TESTED STARTING THIS VEHICLE SEVERAL TIMES WITH ONE FOOT ON BRAKE AND OTHER FOOT ON GAS PEDAL. ENGINE REVS UP NORMALLY, NO RUMBLING WHAT SO EVER. THE RUMBLING CAUSED ME TO BELIEVE THAT SOME CYLINDERS WERE NOT FIRING DURING THIS EVENT. DEALER DID NOT MAKE ANY ATTEMPT TO FIND OR DUPLICATE PROBLEM. NAMES OF TELEPHONES NUMBERS OF OTHER PASSENGERS ARE AVAILABLE. *TR
WHEN STEPPING ON BRAKE, MOTOR RACED UP TO 5000 RPM. ( LIKE CRUISE CONTROL WAS ENGAGING. HAD TO GO TO NEUTRAL PUMP THE ACCELERATOR TO BRING RPM DOWN. IN A PARKING LOT WITH BOTH FEET ON THE BRAKE IT PUSHED ME 5 FEET BEFORE I COULD GET IT UNDER CONTROL. *JB
Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.
Categories with enough reports to have a page of their own
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