Genuine OEM BMW SCR Metering Module Line, part number 11538479907. This line is part of the SCR (Selective Catalytic Reduction) system, responsible for transporting fluid to the metering module. It plays a vital role in reducing harmful emissions from the exhaust. Located in the emissions system. Genuine OEM lines are designed for precise fluid delivery and resistance to the operating environment, ensuring the longevity of the emissions control system.