One problem related to air bag 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.
At 69000 miles the lighting control module, climate control module, restraint control module stopped functioning. All at the same time. Odd they all go out at the same time. Safety issue.