This product is a genuine EGR (Exhaust Gas Recirculation) valve bolt designed for use in Volkswagen and Audi vehicles. The part number for this bolt is N91055301. It is a crucial component in the EGR system, responsible for controlling the flow of exhaust gases back into the engine for more efficient combustion. This bolt is made with high-quality materials to ensure durability and reliable performance. It is an authentic OEM (Original Equipment Manufacturer) part, specifically designed for VW and Audi vehicles.