Genuine OEM Audi Turbocharger Oil Return Line, part number 03L145735C. This critical component channels oil from the turbocharger assembly back to the oil pan or reservoir, ensuring proper lubrication and cooling of the turbo. Made from durable metal tubing, it measures 0.195 meters in length. Using a genuine OEM oil line guarantees correct routing geometry, precise fittings, and resistance to high temperatures and pressures, preventing leaks and maintaining turbocharger longevity.