This product is a Genuine VW / Audi Ignition Knock (Detonation) Sensor Bolt with the part number N01024425. It is designed to be used in the ignition system of Volkswagen and Audi vehicles to detect and prevent engine knock or detonation. This bolt is an essential component for maintaining the proper functioning of the engine and ensuring optimal performance. It is made with high-quality materials and is an authentic replacement part from the original manufacturer.