Problems owners report
Complaints filed with NHTSA about the 1993 Mercury Grand Marquis, by the system named in each complaint. One complaint can name several.
- Power train29
- Service brakes, hydraulic22
- Electrical system20
- Vehicle speed control19
- Steering18
- Exterior lighting11
- Seats10
- Visibility8
- Engine and engine cooling7
- Fuel system, gasoline6
NHTSA ODI complaints (public domain) · updated 23 Oct 2026 · 7 injuries and 0 deaths reported
Compared with other years
NHTSA ODI complaints by model year
New York safety inspections
At its first New York inspection the 1993 Mercury Grand Marquis failed the safety check 1.81% of the time — 51% more often than the average 1993 passenger car (1.20%). Median odometer at inspection: 94,690 miles.
NY DMV Vehicle Inspections (vezn-fmmk), initial inspections since Aug 2021 · how we count
Recalls in Canada
3 Transport Canada recalls for the 1993 Mercury Grand Marquis.
| 2008038 6 Feb 2008 | Electrical On certain vehicles, a wiring harness that is not compatible with the vehicle circuit polarity may have been inadvertently installed during servicing for recall… |
| 2007258 7 Aug 2007 | Electrical On certain vehicles, the speed control deactivation switch may overheat, smoke, or burn, potentially resulting in an underhood fire. The failure mode appears t… |
| 1999097 19 May 1999 | Engine Certain vehicles may experience a fire originating in the left front under hood area as a result of electrical overheating of the speed control deactivation swi… |
Transport Canada Vehicle Recalls Database · Contains information licensed under the Open Government Licence – Canada
Recalls
FORD IS RECALLING 225,000 MY 1992-2003 ECONOLINE, MY 1993-1995 TAURUS SHO, MY 1992-1998 CROWN VICTORIA, MY 1993 BRONCO, F-SERIES, MY 1995-1997 F-SERIES SUPER DUTY STRIPPED CHASSIS, MY 1992-1998 MERCURY GRAND MARQUIS, AND MY 1992-1995 LINCOLN TOWN CAR VEHICLES. THE AFFECTED VEHICLES WERE PREVIOUSLY REPAIRED USING A WIRING HARNESS THAT IS NOT COMPATIBLE WITH THE VEHICLE CIRCUIT POLARITY.
ON CERTAIN PICKUP TRUCKS, PASSENGER VEHICLES, SPORT UTILITY VEHICLES, AND MOTOR HOMES CHASSIS, THE SPEED CONTROL DEACTIVATION SWITCH MAY, UNDER CERTAIN CONDITIONS, LEAK INTERNALLY AND THEN OVERHEAT, SMOKE, OR BURN.
VEHICLE DESCRIPTION: PASSENGER VEHICLES. THE SPEED CONTROL DEACTIVATION SWITCH CAN DEVELOP A RESISTIVE SHORT IN THE ELECTRICAL CIRCUIT THAT COULD POTENTIALLY RESULT IN AN UNDERHOOD FIRE. A FIRE IS POSSIBLE BOTH WHEN THE VEHICLE IS RUNNING AND WHEN THE VEHICLE ENGINE IS OFF. ALSO, THE SHORT COULD DISABLE THE SPEED CONTROL SYSTEM OR CAUSE THE BRAKE LIGHT FUSE TO OPEN.
Whether a recall was fixed on a particular car is known only to the manufacturer: check the VIN at nhtsa.gov/recalls.
NHTSA recalls · summaries in NHTSA's own words
Service bulletins
What Mercury told its dealers about the 1993 Mercury Grand Marquis: known faults, fixes and updates.
| Bulletin | Summary |
|---|---|
| 636080 | TRANSFER SERVICE TIPS FOR THE FRONT WIPER MOTOR MOUNT BRACKET AND DEPRESSED PARK OUTPUT ARM. *TT |
| 630001 | SOME ENGINE ASSEMBLIES WITH ALUMINUM CYLINDER HEADS REPAIRED IN-VEHILE HAVE BEEN FOUND TO LEAK COOLANT AND/OR OIL FROM THE CYLINDER HEAD GASKET AREA. *TT |
| 627791 | PARTS AND PROCEDURE TO REDUCE THE POTENTIAL OF FUEL TANK PUNCTURES DURING RARE AND EXTREMELY HIGH-SPEED REAR IMPACTS. *TT |
| 627747 | THIS ARITLCE IS TO PROVIDE INFORMATION ON REPLACEMENT OF OLD STYLE HOOD LAMP SWITCH TO THE RVISED MECHANICAL HOOD LAMP SWITCH. *TT |
| 625715 | BRAKE SHIFT INTERLOCK.*JB |
| 623988 | INFORMATION REGARDING TRANSMISSION FLUID USAGE CHARTS. *SLC |
| 623944 | SOME VEHICLES MAY EXHIBIT HEATER CORE LEAKS. *SLC |
| 622660 | THIS INFORMATION IS A SUPPLEMENT TO THE WIPER SYSTEM SERVICE INFORMATION PROVIDED IN THE WORKSHOP MANUALS. THIS SERVICE INFORMATION IS INTENDED AS AN AID TO ASSIST IN DIAGNOSIS AND REPAIR OF ERRATIC WIPER SYSTEM CONDITIONS. *TT |
| 619424 | SUBJECT REGARDING ENGINE OIL RECOMMENDATIONS FOR USE IN 2001 VEHICLES - SAE 5W-20 MOTOR OIL. *TT |
| 619299 | INFORMATION ON REPLACING FUEL TANK STRAP BOLTS. *TT |
| 618546 | SUBJECT REGARDING CLIMATE CONTROL - EATC - BLOWER MOTOR CONTROL SERVICE TIPS. *JB |
| 616522 | SUBJECT REGARDING CONTAMINATION FROM PRIOR TRANSMISSION CONCERNS OR EXCESS WEAR MAY BE TRAPPED IN THE TRANSMISSION FLUID COOLING SYSTEM. *TT |
| 613335 | SUBJECT REGARDING A NEW TRANSMISSION CASE AND MAIN CONTROL RELEASED FOR SERVICE ON AODE / 4R70W TRANSMISSIONS. *TT |
| 612203 | INFORMATION REGARDING THE NEW TRANSMISSION COOLER FLUSHER- SERVICE TIP. *MJS |
| 6090087 | INFORMATION ON IDENTIFYING NON-APPROVED / ALTERNATE REFRIGERANTS WHICH COULD CAUSE SAFETY, AND PERFORMANCE CONCERNS IF INSTALLED IN FORD A/C SYSTEMS. *TT |
| 6090082 | INFORMATION FOR SERVICING AND DIAGNOSING BRAKE VIBRATION, BRAKE INSPECTION, AND BRAKE FRICTION MATERIAL REPLACEMENT. *TT |
| 6089681 | SUBJECT ON A WIRE HARNESS TERMINAL REPAIR KIT AVAILABLE FOR REPAIRING ELECTRICAL WIRING HARNESSES. *TT |
| 608431 | INFORMATION ON THE NEW FLUSH AND FILL TOOL AVAILABLE THROUGH ROTUNDA. *TT |
| 607411 | CONCERNS WITH VEHICLES EXHIBITING A TORQUE CONVERTER SHUDDER. *TT |
| 606508 | CONDITIONS WITH THE BRAKE LAMPS INADVERTENTLY DISABLING THE BRAKE SHIFT INTERLOCK. *TT |
| 606460 | EXPERIENCING A WHINE / BUZZ TYPE NOISE IN THE SPEAKERS OF THE ENTERTAINMENT RADIO OR TWO-WAY RADIO ON VEHICLES WITH AN IN-TANK ELECTRIC FUEL PUMP. *TT |
| 606420 | FORD MOTOR COMPANY NOW RECOMMENDS SAE 5W-30 VISCOSITY GRADE FOR SERVICING ANY FORD GASOLINE-POWERED VEHICLE REGARDLESS OF MODEL YEAR. *TT |
| 605562 | SUBJECT REGARDING THE AVAILABILITY OF HUB-MOUNT BRAKE ROTOR MACHINING EQUIPMENT. *TT |
| 604059 | FORD MOTOR COMPANY HAS RELEASED A NEW ELECTRICAL GREASE ( F8AZ - 19G208-AA ) TO REDUCE THE POSSIBILITY OF MOISTURE CORROSION AT THE TERMINALS. *YC |
| 604057 | CONCERNS REGARDING THE FRONT SEAT FEELING LOOSE ON SOME VEHICLE. *YC |
NHTSA manufacturer communications (public domain)
NHTSA investigations
SPEED CONTROL DEACTIVATION SWITCH FIRES
FUEL-FED FIRES
POST REAR END COLLISION FIRES
ENGINE COMPARTMENT FIRES
HOOD FLY-UP WHILE DRIVING
NHTSA Office of Defects Investigation