Genuine OEM Audi Crankcase Oil Separator Seal, part number 06H103517D. This gasket is designed to seal the crankcase oil separator, preventing oil leaks and ensuring the proper functioning of the crankcase ventilation system. It is an irregularly shaped, green-colored gasket, measuring approximately 200mm in length. Choosing a genuine OEM seal ensures the correct material and precise fitment, critical for maintaining engine oil integrity and preventing environmental contamination.