Genuine OEM Audi Catalytic Converter, part number 4E0254401AX. This catalytic converter is a key component in the vehicle's exhaust system, responsible for reducing harmful emissions. It is located in the exhaust system. Weighing 3.526 kg, this part is built for durability. Using a genuine OEM catalytic converter ensures that the vehicle meets emission standards and maintains optimal exhaust system function, as it is designed with precise material composition and flow characteristics.