One problem related to front seat belt buckle assembly has been reported for the 2000 Mercury Grand Marquis. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2000 Mercury Grand Marquis based on all problems reported for the 2000 Grand Marquis.
Problems with seatbelts on 2000 Mercury Grand Marquis. The failure occurred without warning. (the push button on the buckle would not release).
| Seat Belt problems | |
| Front Seat Belt Anchorage problems | |
| Front Seat Belt Warning Light problems | |
| Front Seat Belt Retractor problems | |
| Front Seat Belt Buckle Assembly problems |