The product is a Nitrogen Oxide (NOx) sensor designed for Dodge Ram 2500, 3500, and 4500 vehicles with a 6.7L engine. It is a genuine Parts Plus sensor with a manufacturer warranty of 3 years. The sensor is interchangeable with various part numbers such as 2872948NX, 4326873, and 904-6011, among others. This NOx sensor plays a crucial role in monitoring and regulating emissions from the vehicle's exhaust system, contributing to cleaner air and overall vehicle performance.