One problem related to engine oil leaking 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.
The gears tended to pop, making the vehicle jump forward, as well the engine leaking oil, and increasing the chance of the vehicle to overheat. Taken to dealer for repairs 4 times, but the problem recurred. Consumer was informed that a new engine was needed, but it will be at consumer's expense.