One problem related to defogger has been reported for the 2001 Mercury Grand Marquis. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2001 Mercury Grand Marquis based on all problems reported for the 2001 Grand Marquis.
While driving in sleet and snow defroster does not work properly. Defroster can be on, but doesn't clear windows. Please add VIN.