Genuine OEM Volkswagen O-Ring, part number WHT007689. This O-ring is designed to create a seal, preventing the leakage of fluids or gases between two mating surfaces. It is indicated as item 38 in the diagram. The O-ring has dimensions of 0.012m in length, 0.012m in width, and 0.002m in height. Genuine OEM O-rings are made from specific rubber compounds that resist degradation and maintain sealing integrity under various operating conditions.