Genuine OEM BMW Crankshaft Crank Bearing Shells, part number 11217537736. These bearing shells are critical components that surround the crankshaft journals, providing a low-friction surface to allow the crankshaft to rotate smoothly within the engine block. They are designed with precise tolerances to minimize wear and ensure the longevity of the engine. Genuine OEM bearing shells are manufactured to exact specifications, guaranteeing proper fit and performance for optimal engine health.