2003 Mercury Marquis: Reliability Data
When Do Complaints Happen?
Distribution of NHTSA complaints by vehicle mileage at time of report.
What Fails?
Most reported component issues from NHTSA complaints.
Severity Assessment
Sample Complaint Reports
"WHILE DRIVING THE VEHICLE INTERMITTENTLY HEAD LIGHT BECOME INOPERABLE OBSTRUCTING THE DRIVER'S VIEW DEALER. DEALER REPLACED MODULE. TS"
"CONSUMER STATED THE ACCELERATOR WOULD STICK ON OCCASIONS, ALSO WHEN THE BRAKE WAS APPLIED THE VEHICLE FAILED TO STOP. TS *JB"
"CONSUMER STATED THE ACCELERATOR WOULD STICK ON OCCASIONS, ALSO WHEN THE BRAKE WAS APPLIED THE VEHICLE FAILED TO STOP. TS *JB"
Source: NHTSA ODI Complaints Database. Names and identifying details omitted.
When Were Complaints Filed?
Number of complaints by the year the issue occurred.
When Does Each Component Fail?
Median mileage at complaint for top components.
Where Are Complaints Coming From?
Top states by complaint count.
Who Files Complaints?
Mercury Marquis — Other Years
See how this model compares across different model years.
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
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