Genuine OEM Volkswagen Crankshaft, part number 04L105101A. This crankshaft is a critical engine component responsible for converting the reciprocating motion of the pistons into rotational motion, which ultimately powers the vehicle. It is located within the engine block and is the central rotating shaft of the engine. Manufactured to exact specifications, this crankshaft ensures smooth operation and longevity. Genuine OEM parts are vital for crankshafts as they guarantee the precise balancing, material strength, and bearing journal tolerances required for high-stress, high-speed operation, preventing premature wear and potential engine failure.