One problem related to catalytic convertor has been reported for the 2001 Audi A6. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2001 Audi A6 based on all problems reported for the 2001 A6.
The insulated hear shield around the catalytic converter started a slow burn and excessive smoke, causing a fire alarm, while the car was parked at my work place. The fire company responded and put the fire out. The incident happened a second time. Updated 01/30/12.