Genuine OEM Audi Turbocharger Oil Return Line, part number 04B145736F. This critical component is responsible for safely directing hot oil from the turbocharger bearing housing back into the engine's oil pan, preventing oil starvation or buildup within the turbo. It is positioned directly beneath the turbocharger assembly. Weighing approximately 0.11 kg, this line is constructed from durable metal to withstand high temperatures and oil pressure. Choosing a genuine OEM return line ensures the correct routing, sealing, and material integrity, which are vital for the longevity and efficient operation of the turbocharger.