Welds May Crack on Front Catalytic Converter on Mercedes-Benz ML500

Submitted by Vehicle Owner · May 29, 2025

Published by RepairPal

Problem overview

An exhaust leak may develop due to cracked welds on the front catalytic converter. Replacement of the catalyst is recommended; re-welding of the catalyst is discouraged because it is an emissions device.

10 people reported this problem

5 comments

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Mercedes-Benz ML500 vehicles with this problem

4 model years affected

2005 Mercedes-Benz ML500

2004 Mercedes-Benz ML500

2003 Mercedes-Benz ML500

2002 Mercedes-Benz ML500

2005 Mercedes-Benz ML500

2004 Mercedes-Benz ML500

2003 Mercedes-Benz ML500

2002 Mercedes-Benz ML500

Average mileage: 143,033 miles

(58,000 - 246,200)

Repairs related to this problem

Catalytic Converter Replacement

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