This product is a genuine exhaust temperature sensor designed for use in Volkswagen and Audi vehicles. The part number is 04L906088JD. It is used to measure the temperature of the exhaust gases and send this information to the vehicle's engine control unit. This sensor is an essential component for proper engine performance and emissions control. It is a high-quality, OEM (original equipment manufacturer) part that meets all factory specifications and is guaranteed to fit and function correctly.