Genuine OEM Audi Reducing Agent Transfer Line, part number 4K0131960AB. This critical component is responsible for transporting the reducing agent (such as AdBlue or DEF) from its reservoir to the exhaust system, where it aids in reducing harmful nitrogen oxide emissions. The line assembly includes necessary connections and may incorporate heating elements to prevent fluid freezing in cold conditions. Using a genuine OEM transfer line ensures correct material compatibility, precise routing geometry, and reliable operation within the complex emissions control system.