Genuine OEM Hyundai Crankshaft Sprocket, part number 231212M810. This critical engine component is responsible for transmitting rotational force from the crankshaft to the timing chain or belt, synchronizing the camshafts with the crankshaft. It is located at the front end of the engine's crankshaft. Using a genuine OEM sprocket ensures accurate timing, proper chain engagement, and the durability required for reliable engine operation.