The product is a BMW crankshaft to balance shaft sprocket with the manufacturer part number 8509302, 8509738, and 11278509738. Made in Germany, this high-quality sprocket is a genuine BMW part suitable for various BMW models such as the 1, 2, 3, 4, 5, X1, and X3 series. Designed for optimal performance and durability, this sprocket is a crucial component for the engine timing system, ensuring smooth and efficient operation. Interchange part numbers 8509302, 8509738, and 11278509738 are also included for added convenience.