"How reliable is the 1990 Mercury Grand Marquis?"

"Based on 63 NHTSA complaints, the 1990 Mercury Grand Marquis has a median complaint mileage of 69000 miles. The most common issue is VEHICLE SPEED CONTROL."

"What are common problems with the 1990 Mercury Grand Marquis?"

"The most frequently reported component in NHTSA complaints for the 1990 Mercury Grand Marquis is VEHICLE SPEED CONTROL, accounting for a significant portion of the 63 total complaints filed."

1990 Mercury Grand Marquis: Reliability Data

Source: NHTSA — 63 complaints

Total Complaints

69,000mi

Median Mileage

VEHICLE SPEED CONTROL

Top Issue

Crash Reports

When Do Complaints Happen?

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

49,000 25th Percentile

69,000 Median Mileage

118,241 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

VEHICLE SPEED CONTROL

POWER TRAIN:AUTOMATIC TRANSMISSION

AIR BAGS

ENGINE AND ENGINE COOLING:ENGINE:GASOLINE

STRUCTURE:BODY:DOOR

AIR BAGS:FRONTAL:SENSOR/CONTROL MODULE

ELECTRICAL SYSTEM:WIRING:FRONT UNDERHOOD

UNKNOWN OR OTHER

ELECTRICAL SYSTEM:IGNITION:SWITCH

ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"GEAR SHIFT LEVER SNAPPED TWICE IN THE LAST EIGHT MONTHS. TT"

"WHEN BRAKES APPLIED CAR LURCHED FORWARD. TT"

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