"How reliable is the 1998 Mercury Grand Marquis?"

"Based on 168 NHTSA complaints, the 1998 Mercury Grand Marquis has a median complaint mileage of 84700 miles. The most common issue is EXTERIOR LIGHTING."

"What are common problems with the 1998 Mercury Grand Marquis?"

"The most frequently reported component in NHTSA complaints for the 1998 Mercury Grand Marquis is EXTERIOR LIGHTING, accounting for a significant portion of the 168 total complaints filed."

1998 Mercury Grand Marquis: Reliability Data

Source: NHTSA — 168 complaints

168

Total Complaints

84,700mi

Median Mileage

EXTERIOR LIGHTING

Top Issue

Crash Reports

When Do Complaints Happen?

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

60,750 25th Percentile

84,700 Median Mileage

112,000 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

EXTERIOR LIGHTING

VEHICLE SPEED CONTROL

SUSPENSION

ENGINE AND ENGINE COOLING:ENGINE:GASOLINE

POWER TRAIN:AUTOMATIC TRANSMISSION

ENGINE AND ENGINE COOLING:ENGINE

EXTERIOR LIGHTING:HEADLIGHTS

SUSPENSION:FRONT

ENGINE AND ENGINE COOLING

STEERING:LINKAGES:TIE ROD ASSEMBLY

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"REAR VIEW MIRROR OBSTRUCTS VIEW WHILE DRIVING."

"VEHICLE ACCELERATED AFTER HAVING SHIFTED THE GEAR INTO PARK, CAUSES VEHICLE TO TAKE OFF WHILE CONSUMER'S FOOT WAS ON BRAKE PEDAL. VEHICLE CONTINUED TO LURCH FOUR TO FIVE BLOCKS, AND LANDED INTO SOMEONE'S FRONT YARD. ONE INJURY WAS SUSTANED. DEALER NOTIFIED. *AK"

"DURING A RAINSTORM THE DOOR WILL HOLD WATER. WILL DRAIN OUT WHICH COULD CAUSE A SHORT, AND LOSS OF POWER WITHIN ELECTRICAL WIRING THAT IS ALSO LOCATED WITHIN DOOR ASSEMBLY. DEALER HAS DONE WATER LEAK TEST NUMEROUS TIMES AND REPLACED KEYBOARD ACTUATOR/RIM PANEL, AND DRILLED NEW DRAIN HOLES,ETC. ..."

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