Genuine OEM Audi Crankcase Breather Hose, part number 03H103202A. This essential engine component is responsible for routing blow-by gases from the crankcase back into the intake system, preventing pressure buildup and maintaining optimal engine ventilation. It features a flexible, corrugated design for precise routing within the engine bay. Weighing approximately 0.074 kg, this hose is constructed from durable, oil-resistant materials. Choosing a genuine OEM breather hose ensures correct routing geometry, resistance to oil and heat, and proper sealing to prevent vacuum leaks and maintain engine efficiency.