PART NUMBER: 111049. 2000-2001 Nissan Xterra. 1998-2000 Nissan Frontier. The purpose of the lighting system of a motor vehicle is to provide illumination for the driver to operate the vehicle safely after dark, to increase the visibility of the vehicle, and to display information about the vehicle's presence, position, size, direction of travel, and driver's intentions regarding direction and speed of travel.