One problem related to manifold/header/muffler/tail pipe has been reported for the 2004 Mitsubishi Endeavor. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Mitsubishi Endeavor based on all problems reported for the 2004 Endeavor.
Vehicle is making rattling noise from undercarriage during acceleration; high pitched whinning noise during driving after vehcile warmed up. Was told by dealership that the intermediate exhaust pipe baffles broken internally, and entire intermediate exhaust needed to be replaced at a cost of $1,400 for part and $150 for labor. Vehicle is only 3 years old with 45,000+ miles.