Genuine OEM Audi Engine Breather Valve Assembly, part number 037103772B. This assembly is a vital component of the crankcase ventilation system, allowing harmful blow-by gases to escape the engine and be recirculated or filtered. It typically connects to the engine's valve cover or intake manifold, managing internal engine pressure. Constructed from durable, heat-resistant plastic, it measures approximately 0.18m in length and 0.087m in width, weighing 0.168 kg, and includes a sealing O-ring. Choosing a genuine OEM breather assembly ensures correct valve calibration, proper sealing, and resistance to oil and heat, preventing oil leaks and maintaining emissions system integrity.