"How reliable is the 1999 Mercury Grand Marquis?"

"Based on 202 NHTSA complaints, the 1999 Mercury Grand Marquis has a median complaint mileage of 103000 miles. The most common issue is EXTERIOR LIGHTING."

"What are common problems with the 1999 Mercury Grand Marquis?"

"The most frequently reported component in NHTSA complaints for the 1999 Mercury Grand Marquis is EXTERIOR LIGHTING, accounting for a significant portion of the 202 total complaints filed."

1999 Mercury Grand Marquis: Reliability Data

Source: NHTSA — 202 complaints

202

Total Complaints

103,000mi

Median Mileage

EXTERIOR LIGHTING

Top Issue

Crash Reports

When Do Complaints Happen?

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

78,002 25th Percentile

103,000 Median Mileage

135,000 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

EXTERIOR LIGHTING

ENGINE AND ENGINE COOLING

VEHICLE SPEED CONTROL

ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE

TIRES

ENGINE

EXTERIOR LIGHTING:HEADLIGHTS

SUSPENSION

ELECTRICAL SYSTEM

SEAT BELTS

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"THE POSITION OF THE REARVIEW MIRROR MAY OBSTRUCT THE VIEW WHILE COMING INTO AN INTERSECTION. DEALER IS NOTIFIED. *AK *ML"

"WHILE TURNING OFF THE WINDSHIELD WIPER THE BLADE DOES NOT RETURN TO ITS POSITION. DEALER IS AWARE OF THE PROBLEM, BUT HAS NO SOLUTION. *AK *ML"

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