One problem related to power assist brake vacuum has been reported for the 2000 Mercury Grand Marquis. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2000 Mercury Grand Marquis based on all problems reported for the 2000 Grand Marquis.
While driving at approximately 10-15 mph made a sudden stop with enough space in front, but abs brakes did not work or hold and vehicle kept coasting, causing a rearend accident. The power brake booster was defective.