This switch is the real deal. The 90-93 Miatas are pre-wired for a fog lamp switch, but if you don't have fog lamps, a blank is in its place. With the OEM Mazda switch, you pop out the original switch, remove the blank from the trim ring, pop the switch into the trim ring, attach the wiring plug, and push the unit back into the dash. All that has to be done after that is to find the wire on the firewall, attach a new wire with a male bullet disconnect into the existing female disconnect and run the postive wire to your lights. The stock wiring lets the fog lights come on with the low beams and turns off when the high beams are selected.