One problem related to structure 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.
2003 Mercury Grand Marquis experiencing problems with the braking system. The consumer's foot would make contact with the brake and the accelerator pedal at the same time. The bake and the accelerator pedals are less than 3 inches apart. The consumer experienced a minor parking accident due to this problem.
| Paint problems | |
| Door Hinge problems | |
| Underbody Shield problems | |
| Body problems | |
| Structure problems | |
| Trunk Lid problems |