Genuine OEM BMW Crankshaft Pulley Hub, part number 11231736532. This hub connects the crankshaft to the pulley, serving as the mounting point for the accessory drive belt system. It is essential for maintaining proper engine timing and accessory function. Made from durable metal for long-lasting performance. Genuine OEM parts are manufactured to exact specifications, ensuring perfect fitment and optimal performance, crucial for critical engine components like the crankshaft hub.