Genuine OEM Volkswagen Engine Oil Return Line, part number 03N145735H. This critical component is responsible for returning oil from the turbocharger assembly back to the engine's lubrication system. It is typically located within the turbocharger oil supply and return circuit. Weighing approximately 0.12 kg, this line is designed for precise fitment. Using a genuine OEM oil line ensures correct routing, material integrity, and resistance to high temperatures and pressures, preventing leaks and maintaining engine lubrication.