Genuine OEM Audi Engine Oil Return Line, part number 057145734J. This line is responsible for safely returning engine oil from the turbocharger or other engine components back to the oil pan, maintaining the engine's lubrication system. It is specifically designed for installation on the left side of the engine. Constructed from durable materials, this oil line measures approximately 0.34 meters in length. Choosing a genuine OEM oil line ensures correct routing geometry, resistance to high temperatures and oil degradation, and secure, leak-free connections for reliable engine operation.