Genuine OEM Volkswagen Pressure Differentiator Control Line, part number 04L131552CP. This flexible line is an integral part of the emissions control system, specifically designed to connect and transmit pressure signals to or from the pressure differentiator. It ensures accurate measurement and control of exhaust gas flow or particulate filter pressure. Measuring approximately 50 cm in length, this line is crucial for the proper functioning of the emissions system. Choosing a genuine OEM control line guarantees the correct material composition for resistance to exhaust gases and temperatures, precise routing, and secure connections, which are essential for maintaining emissions compliance and engine performance.