Genuine OEM Volkswagen Rear Axle Differential Vacuum Hose, part number 7E0525689J. This hose is responsible for supplying the necessary vacuum to the rear axle differential, which is critical for its proper engagement and disengagement. It is positioned at the rear of the vehicle, connecting directly to the differential assembly. With a length of 0.5 meters and weighing 0.044 kg, this hose is engineered for specific routing and pressure requirements. Using a genuine OEM hose ensures the correct material flexibility, diameter, and resistance to fluids, preventing leaks and maintaining optimal differential performance.