One problem related to catalytic convertor has been reported for the 2004 Acura MDX. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Acura MDX based on all problems reported for the 2004 MDX.
The Acuramdx that I bought is for model year 2004, there is kind of a loud droning noise from the exhaust system, that was identified by the reading Honda dealer and furthur confirmed by the mfg's rep, but the problem did not get fixed since the mfg. Has no fix for the problem and the mfg. Is not willing to adress the problem or solve it or refund the money.