Genuine OEM Audi Transmission Vent Line, part number 0MJ301472. This line is crucial for allowing the transmission to breathe, equalizing internal pressure changes caused by temperature fluctuations and fluid movement. It is typically located on the upper section of the transmission housing. Weighing only 0.021 kg, this vent line measures approximately 0.33m in length. Using a genuine OEM transmission vent line ensures the correct material, precise routing, and proper sealing, which are vital for preventing pressure buildup that could damage transmission seals and components.