There are 4 owner-reported powertrain & transmission complaints for the 2005 Mercury Grand Marquisin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
my vehicle was running fine, than all of a sudden the transmission would not shift, i was like omg, what is going on, i had my son with me, my son was driving, he was so scared, i was like take a side street, stay level ground, we coasted down pro tech, [XXX] , that is where the car is now, bill told us,my son and i that the transmission fluid is burnt, when i looked at it the fluid was red,and did not smell burnt, this happened [XXX], i do not understand this at all, i am trying to get help through my insurance company, my claim #[XXX], SAFETY INSURANCE, there was transmission fluid on the dipstick red, INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
TL* THE CONTACT OWNS A 2005 MERCURY GRAND MARQUIS. THE CONTACT STATED THAT WHILE DRIVING 20 MPH, THE VEHICLE STALLED AND WOULD NOT ACCELERATE. THE CONTACT STATED THAT THE TRANSMISSION WAS DEFECTIVE BUT THE VEHICLE HAD NOT BEEN DIAGNOSED BY AN AUTHORIZED DEALER OR A CERTIFIED MECHANIC. THE FAILURE MILEAGE WAS 98,090. UPDATED 7/22/13 *CN
I DID OWNED A 2005 FREESTAR VAN UNTIL I TRADED IT OFF, WHILE DRIVING THE MOTOR JUST QUIT RUNNING AFTER GETTING THE VAN RESTARTED WITH NO TROUBLE THE TRANNY WOULD NOT GO FORWARD OR IN REVERSE. THE TRANNY LIGHT CAME ON SO I HAD TO HAVE THE TRANNY REBUILT AT MY COST PLUS THE TOLL BILL. FORD SHOULD TAKE OF THIS PROBLEM BEFORE SOMEONE GETS A FATAL ACCIDENT AND REIMBURSE OUT OF POCKET MONEY TO ALL THAT FILE A COMPLAINT. *TR
SUDDEN ACCELERATION. THE CAR DID THIS AFTER STARTING IT IN THE DRIVEWAY. UPON PLACING THE CAR IN DRIVE THE CAR ACCELERATED BURNING RUBBER IN THE DRIVEWAY. HAD TO STAND ON BRAKES AND TURN IGNITION OFF TO STOP CAR. THE SECOND INCIDENCE HAPPENED WHILE BRAKING FOR A RED LIGHT, I HAD TO SHIFT CAR INTO NEUTRAL TO STOP CAR. UNSURE OF MILEAGE IN THIS INSTANCE. MOST RECENTLY WHILE IN SOUTH CAROLINA I WAS SITTING AT A RED LIGHT WITH MY FOOT ON THE BRAKE THE CAR SUDDENLY ACCELERATED AND I HAD TO SHIFT TO NEUTRAL TO AVOID REAR ENDING CAR IN FRONT OF ME. (MILEAGE 60,000). *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