Genuine OEM Audi Exhaust Control Line, part number 2Q0253574D. This specialized line is a vital component within the vehicle's exhaust and emissions system, responsible for transmitting signals or fluids for system operation. It is typically connected to sensors or actuators near the catalytic converter or DPF. Weighing 0.1001 kg and measuring 0.39m in length, this line is designed for precise routing and resistance to exhaust temperatures and pressures. Using a genuine OEM control line ensures accurate sensor readings, proper system function, and long-term durability in harsh exhaust environments, which is critical for emissions compliance.