One problem related to air bag light on 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.
Driver seatbelt was replaced (bad maybe) and air bag light came on immediately after seat belt was replaced wipers turn on by themselves and will not turn off.