IllustrationMileage unknown · Sep 20, 1999
Unknown Or Other
NO SUMMARY
NHTSA ODI #711670
1991 Mercury Grand Marquis
Owner reports · Recalls · Investigations
Similar to other model years
Owner complaints for the 1991 Mercury Grand Marquis do not stand out strongly from the model-year median of 78.
About this comparison →How this year compares
Owner complaints by model year
Compare all Grand Marquis years →Counts vary with age, sales and reporting. They are not failure rates.
What owners reported most
All reported categories
Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
Limited mileage data: 2 of 82 reports include usable mileage. There isn’t enough coverage to show a useful chart.
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
- Electrical System. Review the 21 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Vehicle Speed Control. Review the 12 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Air Bags. Review the 11 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
12 crash reports14 fire reports10 injury reports
What owners actually said
82 reportsNO SUMMARY
AIR BAG LIGHT ILLUMINATES DUE TO FAILURE OF THE CLOCK SPRING. MJS
WHILE DRIVING AT 50MPH ON A BRIDGE VEHICLE JUST COMPLETELY STOPPED. NO POWER STEERING, NO ANYTHING. DEALER NOT AWARE OF PROBLEM. PROBLEM STILL EXISTS. PROVIDE FURTHER INFORMATION. *AK
WHILE DRIVING WITH AIR CONDITIONING ON A BURNING SMELL AND SMOKE CAME THROUGH THE VENTS. THIS COULD HAVE STARTED A FIRE IF THE OCCUPANT DID NOT TURN OFF THE AIR CONDITIONING. MANUFACTURER HAS NOT BEEN CONTACTED. PLEASE PROVIDE FURTHER INFORMATION. *AK
THE CONSUMER RELEASED THE EMERGENCY BRAKE AND THE VEHICLE OPENED UP, CAUSING THE VEHICLE TO ACCELERATE UP 65 MPH, AND HIT ANOTHER VEHICLE.*AK
VEHICLE CAUGHT ON FIRE WHILE PARKED AND NOT RUNNING. SMOKE WAS BUILDING UP INSIDE. FIRE DEPARTMENT ARRIVED & PUT FLAMES OUT. ORIGIN OF FIRE WAS HEADLIGHT SWITCH. ALSO, PRIVATE INSPECTOR INDICATED THAT IT WAS THE LIGHT SWITCH. *AK
AS I WAS TURNING A CORNER MY CAR QUIT RUNNING. FURTHER INVESTIGATION FOUND THAT THERE WAS NO POWER GETTING TO THE FUEL PUMP. THE INERTIA SWITCH HAD MELTED FROM A ELECTRICAL SHORT IN THE SYSTEM. AFTER REMOVING THE FUEL PUMP/SENDING UNIT ASSY. FROM THE GAS TANK, I FOUND THE SHORT IN THE TANK. THE 12 VOLT POWER SUPPLY THAT RUNS F…
Read full complaint
AS I WAS TURNING A CORNER MY CAR QUIT RUNNING. FURTHER INVESTIGATION FOUND THAT THERE WAS NO POWER GETTING TO THE FUEL PUMP. THE INERTIA SWITCH HAD MELTED FROM A ELECTRICAL SHORT IN THE SYSTEM. AFTER REMOVING THE FUEL PUMP/SENDING UNIT ASSY. FROM THE GAS TANK, I FOUND THE SHORT IN THE TANK. THE 12 VOLT POWER SUPPLY THAT RUNS FROM THE TANK WALL PLATE, TO THE FUEL PUMP, RUNS TO CLOSE TO THE SENDING UNIT MOUNTING PLATE NEAR THE FUEL PUMP. OVER TIME, THE STEEL MOUNTING PLATE HAD RUBBED THE SINGAL COAT OF INSULATION FROM THE POWER WIRE. THIS CAUSED A DIRECT SHORT INSIDE THE FUEL TANK. AS A CAR MECHANIC FOR TEN YEARS BEFORE MOVING INTO AIRCRAFT MECHANICS, NO SIGNS WERE EVIDENT OF THE SENDING UNIT ASSY. EVER BEING REMOVED. *AK
VEHICLE INTERMITENTLY BUCKS VIOLENTLY BETWEEN 45-65 MPH, DEALER COULD NOT RECTIFY PROBLEM AND REPLACED TIMING CHAIN, PROBLEM STILL EXISTS.
SEVERAL ACCIDENTS OCCURED, DUE TO SUDDEN ACCELERATION. *YC
THE VEHICLE HAD BEEN THROUGH 3 TRANSMISSIONS, A WATER PUMP, BRAKES, MUFFLER, TAILPIPE, SHOCKS AND ELECTRICAL DOOR LATCHES. THE ENGINE CHECK LIGHT COMES ON INTERMITTENTLY. *AK.ET.
Official recalls
191V048000 · Power Train:automatic Transmission
Mar 18, 1991
THE PARK ROD ASSEMBLY CONTAINS A PARK CAM WITH INADEQUATE SURFACE HARDNESS, WHICH COULD LEAD TO PARK DISENGAGEMENT OR NO PARK ENGAGEMENT WHEN THE LEVER IS PLACED IN PARK.
Consequence & remedy
Consequence: IF PARK IS NOT ENGAGED AND THE PARKING BRAKE IS OFF, AVEHICLE ROLL-AWAY COULD RESULT.
Remedy: REPLACE PARK ROD ASSEMBLY ON AUTOMATIC TRANSMISSIONS.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
1PE91125 · Brake Line Punctures
Opened Sep 11, 1991 · Closed Jan 15, 1992
Status: closed (inferred from source dates) · Service Brakes, Hydraulic
There is no summary currently available