The Genuine BMW Interior Light B-Pillar (part number 61319242163) is a replacement light for the interior of a BMW vehicle. It is specifically designed to fit on the B-pillar, which is the vertical support between the front and rear doors. This light provides illumination for the interior of the vehicle, making it easier to see and access items in the car. It is a genuine BMW product, meaning it is made by the original manufacturer and is of high quality and durability. This interior light is an essential component for maintaining the functionality and aesthetics of a BMW vehicle.