Product Overview The Front Left Window Switch LR086040 is a Genuine OE-grade electrical component for select for Land Rover vehicles. Also known as a driver's door master window switch, this assembly controls the front left window and typically includes secondary buttons for additional windows. LR086040 supersedes LR013883 and is a direct replacement for the factory original . Key Features Front left (driver side) position – primary window control switch OE-grade quality –