Genuine OEM Volkswagen Planetary Gear, part number 021911303. This component is marked as number 15 in the diagram and is part of the starter motor assembly. Its function is to transmit torque from the starter motor to the engine's flywheel, initiating the engine's rotation. The part is made of metal and weighs 0.45 kg. Genuine OEM planetary gears are manufactured to exact tolerances for smooth engagement and long service life, ensuring reliable engine starting.