Genuine OEM BMW O-ring, part number 11427590576. This O-ring is a critical sealing component used in the exhaust turbo oil feed line assembly. Its purpose is to create a tight seal between connected parts, preventing oil leaks and ensuring proper lubrication of the turbocharger. Genuine OEM O-rings are made from high-quality materials designed to withstand high temperatures and pressures, ensuring a reliable and long-lasting seal.