Genuine OEM Audi Oil Pump Drive Key, part number 03G115281F. This critical engine component is responsible for transferring rotational motion from the crankshaft or balance shaft to the oil pump, ensuring continuous and adequate lubrication throughout the engine. It is a precision-machined hexagonal rod. Made from hardened steel, it measures approximately 80mm in length and weighs 0.018 kg. Using a genuine OEM drive key ensures the correct material hardness and precise dimensions for reliable power transmission, preventing premature wear and potential oil pump failure.