Genuine OEM Audi Oil Return Line, part number 06F145735F. This pipe is a vital component in the engine's lubrication system, designed to efficiently return used oil from various engine components back to the oil pan for recirculation. It is typically found within the engine bay, connecting to the oil pan. Constructed from durable metal with a flexible braided section to absorb vibrations, it weighs approximately 0.308 kg. Installing a genuine OEM oil return line ensures correct routing geometry, leak-free connections, and material resistance to engine oil and heat, preventing costly oil leaks and maintaining engine integrity.