Genuine OEM Volkswagen Catalytic Converter With Silencer, part number 3D0254451AX. This component integrates catalytic conversion with noise reduction for the exhaust system. It is located in the exhaust assembly, identified as part 16 on the diagram. This part weighs 4.781 kg and has dimensions of 0.8m x 0.14m x 0.14m. Genuine OEM parts are critical for maintaining the correct balance between emissions compliance and exhaust sound levels.