Genuine OEM Audi Engine Breather Line, part number 0P2103211D. This line is a crucial component of the engine's crankcase ventilation system, designed to allow harmful crankcase gases to escape. It helps maintain optimal engine pressure and prevents the buildup of contaminants that can degrade engine oil. This specific line is located on the right side of the engine assembly. Weighing 0.059 kg and measuring 0.15 meters in length, it is engineered for precise fitment. Choosing a genuine OEM breather line ensures correct material composition, resistance to oil and heat, and accurate routing to prevent leaks and maintain engine efficiency.