Genuine OEM Volkswagen Valve Stem Seal, part number 06K109675B. This seal is critical for preventing engine oil from entering the combustion chambers and being burned. It is installed on the valve stem within the cylinder head assembly. Made from durable rubber or similar elastomer, it maintains its sealing properties under high temperatures and pressures. Genuine OEM parts ensure precise dimensions and material composition, vital for maintaining engine compression and controlling oil consumption.