One problem related to catalytic convertor has been reported for the 2004 Mazda MAZDA3. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Mazda MAZDA3 based on all problems reported for the 2004 MAZDA3.
On October 2004 I bought a new 2004 Mazda 3 . After the 1st week I noticed a rotten egg smell . The dealer denies that the catalytic converter is bad and will not replace it. This smell is sickening. How can you help.