Genuine OEM BMW Crankshaft Shell, part number 11217637064. This crankshaft shell supports and protects the crankshaft within the engine. It is a critical component for the proper functioning of the engine's rotating assembly. Manufactured from high-quality materials to ensure longevity and performance. Genuine OEM parts are essential for crankshaft shells due to the extremely tight tolerances and high loads they endure, ensuring vibration-free operation and preventing premature wear.