One problem related to oil pump has been reported for the 2002 Mercury Mountaineer. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2002 Mercury Mountaineer based on all problems reported for the 2002 Mountaineer.
I had a spark plug blow out of my 2002 Mercury Mountaineer 4. 6l engine. The car has 86,000 miles on it but this is the second engine. The original engine was replaced in Dec 2003 when it had 49,000 miles on it. The original engine seized up after an oil pump failure.