Genuine OEM Volkswagen Control Line With Pressure Difference Sender, part number 04L131552CT. This control line is a component of the emissions system, specifically designed to work with a pressure difference sender. It facilitates the transmission of pressure signals for monitoring and control of emissions-related components. The line is part of the exhaust gas recirculation (EGR) or similar emissions control circuit. Genuine OEM control lines are manufactured to precise tolerances for accurate signal transmission and durability within the demanding emissions system.