This item is a Nox Sensor. You can use this to replace your old or damaged Nox Sensor. n nSpecification??? nPart Name:Nox Sensor nPart Number:A0101539528/001 /5WK9 6653C nApplication:for BENZ n nPackaging & Delivery??? nPackaging Details???Original, neutral or customized nPort???Any main port in China n nThis is just for reference, please check and confirm the part number carefully before purchasing