One problem related to manifold/header/muffler/tail pipe has been reported for the 2004 Mercury Mountaineer. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Mercury Mountaineer based on all problems reported for the 2004 Mountaineer.
The contact owns a 2004 Mercury Mountaineer. While having the vehicle serviced for routine maintenance at an authorized dealer the contact could smell a burning odor. The contact was told the engine manifold was cracked and leaking. The vehicle was repaired. A few days later the vehicle began shaking while stopped. The vehicle was taken back to an authorize dealer where the contact was told the engine coils and spark plugs needed to be replaced. The vehicle was repaired. The failure and current mileages were 46,845. Updated 03/24/lj.