We don't have a lot of Mercury Grand Marquis engine problems on file — feel free to add yours here. The most common Grand Marquis engine problems cost $2,100 to fix & occur at 81,000 miles. Click on a year below.

Worst Engine Problems
intake manifold failure 1997 Mercury Grand Marquis
valve dropped through engine 2007 Mercury Grand Marquis
plastic intake manifold cracks 1998 Mercury Grand Marquis