FRONT DOORL LOCKS INOPERATIVE.
1990 Mercury Grand Marquis
Owner reports · Recalls · Investigations
Similar to other model years
Owner complaints for the 1990 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: 5 of 56 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 13 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Air Bags. Review the 9 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Vehicle Speed Control. Review the 9 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
56 reportsWIRING HARNESS FAILURE CAUSED FIRE.
VEHICLE FIRE.
THE GROMMET THAT CONNECTS ROD FROM TRANSMISSION TO FUEL SUPPLY IS MADE OUT OF PLASTIC AND IS VERY CLOSE TO THE MANIFOLD. OVER TIME IT OVERHEATS AND STARTS TO CORRODE AND CAUSES EXTENSIVE TRANSMISSION FAILURES. THE CONSUMER HAS REPLACED THE PLASTIC PART WITH METAL GROMMETS TO PREVENT THIS FROM HAPPENING AGAIN.
UNSPECIFIED.
DRIVER'S AND PASSENGER'S FRONT DOOR LOCK MECHANISMS FREEZE UP AND STOP WORKING PROPERLY WHEN THE TEMPERATURE DROPS LOW.
WHEN ADJUSTING THE DRIVER'S SIDE SEAT, THE SEAT DOES NOT LATCH IN PLACE, CAUSING THE SEAT TO SLIDE FORWARD WHEN BRAKING. *AK
WHEN TURNING ON THE CAR THE AIR BAG LIGHT COMES ON AND OFF. PLEASE DESCRIBE .
OWNER UNABLE TO DETECT HORN BUTTONS ON STEERING WHEEL. *AK
CONSUMER WAS SITTING AT A RED LIGHT AND HAD HIS FOOT ON THE BRAKE PEDAL AND THE VEHICLE SEIZED UP AND TOOK OFF. *AK
Official recalls
0No recalls in this snapshot.
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
Illustration