One problem related to ignition has been reported for the 2002 Mercury Grand Marquis. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2002 Mercury Grand Marquis based on all problems reported for the 2002 Grand Marquis.
When the consumer applied the brake his foot also hit the accelerator pedal which caused the vehicle to accelerate suddenly. The vehicle turn signal were inoperative and the ignition key was hard to turn at times.