Genuine OEM Audi Cooling System Ventilation Union, part number 06K121143. This component is designed to connect and route ventilation lines within the engine cooling system, facilitating the removal of air and maintaining proper system pressure. It is positioned to ensure efficient coolant flow and prevent air pockets. Made from durable black plastic, it measures approximately 43mm in length. Using a genuine OEM union ensures precise hose connections and material resistance to coolant and temperature fluctuations, critical for preventing leaks and maintaining cooling system integrity.

Catalogue entry: ADAPTER.