One problem related to other fuel system fuel gauge 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.
Fuel gauge that comes off full too quickly and reads lower then actual fuel tank level.
| Other Fuel System problems | |
| Other Fuel System Fuel Gauge problems |