Genuine OEM Audi Oil Pump Drive Shaft, part number 05A115120. This shaft is a critical component in the engine lubrication system, responsible for transferring rotational force from the engine to the oil pump. It is engineered to withstand high-stress operating conditions within the engine block. Genuine OEM parts are essential for this application to ensure exact dimensional tolerances, which are critical for preventing premature wear and maintaining consistent oil pressure throughout the engine's service life.