This item is a Nox Sensor. You can use this to replace your old or damaged Nox Sensor.nnSpecification???nPart Name:Nox SensornPart Number:RE553441/5WK9 6785nApplication:for JohnDeerennPackaging & Delivery???nPackaging Details???Original, neutral or customizednPort???Any main port in ChinannThis is just for reference, please check and confirm the part number carefully before purchasing