Genuine OEM Volkswagen Vacuum Hose Assembly, part number 03H133778CF. This assembly connects various vacuum lines within the engine bay, crucial for regulating engine functions and emissions control. It is positioned within the engine compartment, routing vacuum signals to different actuators. Constructed from durable rubber and plastic components for reliable performance and longevity. Genuine OEM parts are essential for vacuum systems to maintain precise air-fuel mixture and engine performance.