1993 Mercury Grand Marquis: Reliability Data

Source: NHTSA — 178 complaints
178
Total Complaints
100,000mi
Median Mileage
POWER TRAIN:AUTOMATIC TRANSMISSION
Top Issue
11
Crash Reports

When Do Complaints Happen?

Distribution of NHTSA complaints by vehicle mileage at time of report.

70,000 25th Percentile
100,000 Median Mileage
140,539 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

POWER TRAIN:AUTOMATIC TRANSMISSION
19
VEHICLE SPEED CONTROL
12
POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER
8
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:ROTOR
7
STEERING:LINKAGES:TIE ROD ASSEMBLY
7
SEATS
6
SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP
6
ELECTRICAL SYSTEM:IGNITION:SWITCH
6
EXTERIOR LIGHTING:HEADLIGHTS
6
ELECTRICAL SYSTEM
6

Severity Assessment

11
Crashes
20
Fires
7
Injuries
0
Deaths

Sample Complaint Reports

"WAS ON THE ROAD DRIVING 55MPH SLOW DOWN TO GET ON THE HIGHWAY TRY TO STOP USING BRAKE WOULDN'T STOP PUT INTO NEUTRAL STILL WOULDN'T STOP PUT INTO PARK CAR STOP."
"DESIGN: WHILE OPENING DRIVER'S SIDE DOOR, DOOR PANEL FLEW BACK HITTING OCCUPANT IN FACE/UPPER CHEST; CAUSED BRUISES TO OCCUPANTS. TT"
"1) ELECTRICAL SYSTEM FAILS WITH ERRATIC OPERATION OF LIGHTS AND SEVERE STALLING. 2) BRAKE SYSTEM FAILS WITH PEDAL GOING TO FLOOR. UNABLE TO DETECT FLUID LOSS."

Source: NHTSA ODI Complaints Database. Names and identifying details omitted.

Data source: View this vehicle on NHTSA.gov | NHTSA ODI Complaints Database. Public domain.

Methodology: Complaint counts and mileage distributions are computed directly from consumer-reported NHTSA complaints. This data represents reported issues, not failure rates — vehicles without complaints are not represented. Full methodology.

Data through: 2026-03-28