One problem related to catalytic convertor has been reported for the 2004 Volkswagen Passat. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Volkswagen Passat based on all problems reported for the 2004 Passat.
2004 Passat 1. 8t caught fire after a coil pack failed and the catalytic converter overheated. I only drove 5 miles after the coil pack failed trying to limp back to the dealer when the fire started. I put the fire out myself.