For air duct service or repair, you must begin by disconnecting the air bag system by taking out the battery negative cable, then after two minutes, the air bag system capacitor will be discharged to help prevent the air bag from deploying by accident. Do not scratch or scratch the instrument panel during the process. The first step is to remove the instrument panel and put it on a workbench. If it helps, unplug the center radio speaker wire harness connector and lay the wire harness lead somewhere else. After that, unscrew the securing screw for the defroster duct adapter from the instrument panel support and then separate the defroster duct adapter from the defroster duct. Once all is set, use a screwdriver to remove the six holding screws and remove the defroster duct.