Genuine OEM Volkswagen Flywheel, part number 0CK105317AD. This component serves as the primary rotating mass in the engine assembly, providing inertia to smooth out power delivery and housing the starter ring gear. It is located at the rear of the crankshaft assembly. Genuine OEM flywheels are engineered with precise balance and material density to ensure vibration-free operation and long service life, maintaining the exact rotational characteristics required for optimal engine performance.