One problem related to hazard flashing warning light unit has been reported for the 2003 Mercury Grand Marquis. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Mercury Grand Marquis based on all problems reported for the 2003 Grand Marquis.
The contact owns a 2003 Mercury Grand Marquis. The contact stated that while driving 40 mph, the headlights became inoperable without warning. The contact used the emergency hazard lights until reaching her destination. The vehicle was not inspected or repaired. The manufacturer was not notified of the incident. The approximate failure mileage was 123900.
| Headlights problems | |
| Exterior Lighting problems | |
| Headlight Switch problems | |
| Tail Light Switch problems | |
| Turn Signal problems | |
| Hazard Flashing Warning Light Unit problems |