The SM 7846 Alternator Rotor Assembly is a precision-manufactured electrical component specifically designed for the Bosch-style (B. Type) charging systems found in the Tata Sumo Spacio series. This is a "Pump Type" rotor, featuring an integrated rear splined shaft specifically engineered to drive the mechanical vacuum pump (brake booster pump) mounted on the back of the alternator. Built to O.E. (Original Equipment) Specifications, this rotor is designed to handle the high-torque and constant duty cycles of the 3.0L Di engine platform.