2003 Mercury Grand Marquis problems and complaints
Owners have filed 395 complaints with NHTSA about the 2003 Mercury Grand Marquis. The most-reported areas: Exterior Lighting (215), Electrical System (55), Vehicle Speed Control (32).
Key takeaways
- 395 owner complaints on file with NHTSA.
- 26 involve a crash, 3 a fire, 18 reported injuries.
- Complaints are unverified owner reports; recalls are confirmed defects.
| Component | Complaints | Share |
|---|---|---|
| Exterior Lighting | 215 | 54% |
| Electrical System | 55 | 14% |
| Vehicle Speed Control | 32 | 8% |
| Steering | 32 | 8% |
| Suspension | 32 | 8% |
| Engine And Engine Cooling | 15 | 4% |
| Air Bags | 13 | 3% |
| Power Train | 12 | 3% |
| Structure | 12 | 3% |
| Service Brakes | 11 | 3% |
| Wheels | 10 | 3% |
| Visibility | 8 | 2% |
One complaint can name several components, so shares add up to more than 100%.
| Version | Overall | Front | Side | Rollover |
|---|---|---|---|---|
| 2003 Mercury Grand Marquis 4-DR. | Not rated | Not rated | Not rated | Not rated |
Latest complaints, as filed
Owner-written and unverified by NHTSA.
Exterior Lighting - filed 2026-05-14
While driving my vehicle headlights turn off and back on, sometimes off for minutes sometimes flickering.
Exterior Lighting,electrical System - filed 2025-05-13
The contact owns a 2003 Mercury Grand Marquis. The contact that the headlights were intermittently inoperable. Additionally, the contact stated that the instrument panel lights, the brake lights, and the turn signal lights were inoperable. The contact who is a mechanic, had inspected the fuses, the fuse box, and other ...
Exterior Lighting - filed 2025-05-06
The Lighting Control Module has failed and my brake lights and dash board lights turn off after couple minutes while driving with the lights on. I took my vehicle in to dealer already once for problem to be fixed a year ago. They did repair but now same problem is occurring again. I went back to dealer Sunrise Ford in ...
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More for the 2003 Mercury Grand Marquis
Complaints are reports filed by owners with the National Highway Traffic Safety Administration. NHTSA publishes them without verifying them, and counts rise with how many cars were sold, so compare years of the same model rather than different models. Crash ratings are NHTSA's own 5-Star Safety Ratings results.