One problem related to engine clicking and tapping noises has been reported for the 2004 Mazda MPV. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Mazda MPV based on all problems reported for the 2004 MPV.
Persistent ticking sound from engine, which has become louder with passing of time. TSB re ticking sound has been performed by showcase Mazda, and on follow-up visit they advised situation is normal, the ticking sound notwithstanding. A respected independent auto repair service, combs automotive, advised the engine absolutely should not be making the ticking sound with only 30k miles on it. Please note that below I show incident date as this month, but it has become more pronounce over past few weeks.