One problem related to engine exhaust system has been reported for the 2001 Mazda MPV. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2001 Mazda MPV based on all problems reported for the 2001 MPV.
Exhaust manifold started leaking causing the check engine light to turn on and a "ticking" sound after startup for the first few minutes. This occurred with 58k on the vehicle.