Genuine OEM BMW Flywheel for automatic transmissions, part number 11221716275. This flywheel is a heavy rotating disc that attaches to the end of the crankshaft. It serves to store rotational energy, smooth out engine power delivery, and provide the necessary surface for the torque converter to engage with. Constructed from durable cast iron, it is designed to withstand the stresses of engine operation. Genuine OEM flywheels are precisely balanced and manufactured to exact specifications for smooth operation and proper torque converter engagement.