NHTSA Owner Complaint Log
This page lists owner-reported complaints filed with NHTSA for the 2004 Mercury Grand Marquis. Complaints are unverified consumer reports submitted to NHTSA and do not by themselves prove a defect or defect rate.
Data synced from NHTSA on May 4, 2026
CRACK INTAKE MANIFOLD BECAUSE IT'S PLASTIC. I HAD TO PAY FOR THE REPAIR AND I WAS NOT AT FAULT.*AK
VEHICLE VIBRATED WHEN IN MOTION AT SPEEDS OF 45 MPH OR GREATER.WHEN DRIVING AT 70 MPH BACK END SWAYED.CONSUMER TOOK VEHICLE BACK TO THE DEALER, WHO CHANGED AND BALANCED TIRES, ALSO, CHANGED THE WHEEL HUBS, BUT PROBLEM RECURRED. *AK *NM
THE ADJUSTABLE PEDAL CAN GO BACK OR FORTH WHEN HITTING THE BRAKE PEDAL THE GAS PEDAL IS SO CLOSE THEY HIT TOGETHER.*AK
THE STEERING WHEEL VIBRATES WHEN DRIVING AT SPEEDS OF 58 MPH AND FASTER. THE DEALERSHIP HAS SERVICED THE VEHICLE 5 TIMES, IN WHICH THEY BALANCED THE TIRES, ROTATE THE TIRES AND MADE AN ADJUSTMENT IN THE STEERING COLUMN. THE PROBLEM STILL EXIST. THE DEALERSHIP ALSO INDICATED THAT THE STEERING WHEEL MEETS FACTORY SPECIFICATIONS AND THE SHAKE IS MINIMUM. *LA THE DEALER ROTATED AND BALANCED THE SYSTEM BUT THE SHAKING PERSISTED. WHEN THE VEHICLE TIRES AND WHEELS WERE REPLACED WITH CAST ALUMINUM THE SHAKING WAS NO LONGER FELT. THE CONSUMER FEELS THAT THE PREVIOUS SET OF TIRES AND WHEELS WERE DEFECTIVE. *NM
CONSUMER STATED THAT WHILE DRIVING CAME TO A RED LIGHT AND VEHICLE TOOK OFF. THE MORE HE APPLIED THE BRAKES THE FASTER VEHICLE WENT. HE AND HIS WIFE NARROWLY ESCAPED A COLLISION. CONSUMER TOOK FEET OFF THE BRAKES, AND PLACED THE VEHICLE IN NEUTRAL, WHICH CAUSED IT TO SLOW DOWN. THEN, HE COASTED TO THE SIDE OF THE ROAD. CONSUMER CALLED THE DEALER, WHO TOLD HIM TO CALL A TOW TRUCK. CONSUMER HAD VEHICLE TOWED TO THE DEALER. AFTER INSPECTING THE VEHICLE DEALER TOLD CONSUMER THAT THEY NEVER HEARD OF THIS PROBLEM WITH THIS TYPE OF VEHICLE. HOWEVER, HE WAS TOLD BY ANOTHER DEALER THAT IT MIGHT HAVE BEEN THE CRUISE CONTROL KICKING IN WHEN IT WAS NOT SUPPOSE TO. CONSUMER WAS VERY CONCERNED BECAUSE HE AND HIS WIFE WERE NEARLY KILLED.*AK
WHEN ATTEMPTING TO PRESS THE BRAKE PEDAL, THE DRIVER ALSO PRESSED ON THE ACCELERATOR PEDAL AND CAUSED THE VEHICLE TO ACCELERATE WHICH MADE IT DIFFICULT TO STOP THE VEHICLE. THE CONSUMER STATED THAT THE PEDALS WERE TOO CLOSE TO EACH OTHER. *AK *SC *JB
WITH THE CONSUMER'S FOOT ON THE BRAKE, THE VEHICLE SUDDEN ACCELERATED AND STARTED SHAKING. (NAR) *PH *CB
THE TRANSMISSION KEEPS STALLING ON UPGRADES.. IT STALLS ON GRADES AFTER THE FIRST WEEK...THE TRANSMISSION WILL NOT HOLD UP UNDER PRESSURE....IT CONTINUES TO LOSE PRESSURE...POWER...IT MUST BE RECALLED.. THE FIRST ONE I HAD I THOUGHT SHOULD BE RECALLED BUT THE DEALERSHIP GAVE ME ANOTHER AFTER 8 MONTHS....IT IS DOING THE SAME THING PLEASE SOMEBODY HELP I WILL GO EVERYWHERE I KNOW AND MAKE THIS PUBLIC UNTIL THIS IS RESOLVED. *AK
THE TURN SIGNAL FAILED INTERMITTENTLY. THE CAUSE HAD NOT BEEN DETERMINED. *JB THE TURN SIGNAL RACED EXTREMELY FAST THAT THE LIGHTS FLICKER INSTEAD OF BLINKING. THE PROBLEM OCCURRED 30 TIMES SINCE DEC. 2003. FORD WAS AWARE OF THE PROBLEM BUT DID NOT HAVE A FIX. *SC