Genuine OEM Audi Reducing Agent Metering Line, part number 4G0131984AM. This critical component is responsible for accurately delivering the reducing agent (e.g., AdBlue) from its reservoir to the reducing agent injector, which is vital for the selective catalytic reduction (SCR) system in modern diesel engines. The line ensures precise metering for effective NOx reduction. Weighing 0.144 kg and measuring 0.34 m in length, it is designed for specific routing. Choosing a genuine OEM metering line guarantees correct material composition, pressure resistance, and exact connectors for reliable emissions system performance.