Genuine OEM VAG Pressure Differential Sensor Control Line, part number 04L131552GD. This control line is part of the exhaust gas recirculation or particulate filter system, connecting the differential pressure sensor to the exhaust stream to monitor pressure differences. It is typically a flexible hose or rigid pipe. Genuine OEM control lines are manufactured to exact specifications for proper fitment and resistance to exhaust system conditions, ensuring accurate sensor readings and system functionality.