1999 TO 2000 MAZDA MIATA THE WIRING HARNESS FOR THE LOW/HIGH BEAM HAS BEEN SHOWN TO GENERATE HIGH TEMPERATURES AND ON ONE OCCASION, CAUSE A FIRE. I PERSONALLY HAVE EXPERIENCED THIS WITH MY 1999 MIATA WHICH PROMPTED ME TO REPLACE THE FORWARD SECTION OF THE H4 HEADLIGHT WIRING HARNESS. OTHERS ON THE MIATA.NET FORUM ( SEE HTTP://FORUM.MIATA.NET/VB/SHOWTHREAD.PHP?T=360101 HAVE EXPERIENCED THIS, AND ONE MEMBER WHO STARTED THE THREAD EXPERIENCED A FIRE AND DAMAGE. ) I URGE THE NHTSA TO LOOK INTO THIS FURTHER WITH MAZDA USA. *TR