Genuine OEM Volkswagen Rear Differential Vent Hose, part number 02D525095K. This hose is a critical component for the rear differential, allowing it to properly vent internal pressure that builds up during operation. Proper venting prevents pressure buildup that could damage seals and compromise lubrication. It is connected to the rear differential assembly. Weighing only 0.0183 kg and measuring 0.355m x 0.023m x 0.023m, this hose is designed for specific routing and material resistance. Using a genuine OEM vent hose ensures correct material composition for fluid resistance and proper routing geometry, which are vital for the long-term health and performance of the differential.