Genuine OEM Volkswagen Reduction Agent Supply Line, part number 7E0131983G. This component delivers reduction agent, such as Diesel Exhaust Fluid (DEF) or AdBlue, to the exhaust system for effective emissions control. The line is designed with specific routing and connectors to ensure precise fluid delivery. Choosing a genuine OEM supply line guarantees correct material compatibility, leak-free connections, and reliable operation of the emissions reduction system.