Audi A4 owners have reported 1 problem related to catalytic convertor (under the engine and engine cooling category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Audi A4 based on all problems reported for the A4.
At 51,000 miles I had the catalytic converter replaced on my Audi under warranty due to a broken pipe flange. I now have 102,000 on the Audi and the same part is broken. Audi USA will not replace or repair this part. I feel it must be a defect in the workmanship or materials since a catalytic converter should not be replaced until it is worn out and not before then. This is part of the emissions system and the epa should also know about this.
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all problems of the 1999 Audi A4
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