Genuine OEM Volkswagen Transmission Breather Tube, part number 0C8301047D. This essential component is designed to allow the transmission or gearbox housing to equalize internal pressure with the atmosphere, preventing pressure buildup that could damage seals. It also helps to vent moisture and heat, contributing to the longevity and efficient operation of the transmission. Positioned on the exterior of the transmission housing, this tube is approximately 0.438 meters long. Using a genuine OEM part ensures correct routing, material integrity, and proper ventilation characteristics, vital for protecting the transmission from internal pressure fluctuations and contamination.