Genuine OEM Volkswagen camshaft, part number 079109101HJ. This component is responsible for precisely controlling the opening and closing of engine valves to ensure efficient combustion and power delivery. It is located within the cylinder head assembly as indicated by position 5 in the diagram. Genuine OEM camshafts are manufactured to exact factory tolerances and material specifications, which is critical for maintaining proper valve timing and preventing premature wear or catastrophic engine failure.