Genuine OEM Volkswagen Fuel Injector Sealing Ring, part number 04L130519B. This critical component forms a tight seal around the fuel injector, preventing fuel or combustion gas leaks and ensuring proper fuel delivery. It is installed at the base of the fuel injector, where it meets the cylinder head or manifold. This small ring weighs approximately 0.001 kg and is typically made from copper or a similar sealing material. Using a genuine OEM sealing ring guarantees the correct material composition and precise dimensions for a leak-free seal, which is vital for engine efficiency and preventing costly damage.