Genuine OEM Volkswagen Oil Return Line, part number 028145736E. This oil line is a critical component of the turbocharger system, responsible for returning excess lubricating oil from the turbocharger back to the engine's oil pan. Proper oil return is essential to prevent oil buildup within the turbocharger, which can lead to seal damage and reduced performance. The line is constructed from durable materials designed to withstand high temperatures and oil pressure. Genuine OEM oil return lines ensure correct flow rates and material compatibility, vital for turbocharger longevity.