ON SATURDAY I SMELLED A BURNING SMELL WHILE DRIVING ON THE HIGHWAY BUT IT WENT AWAY QUICKLY AND I COULDN'T FIND ANY SOURCE IN THE VEHICLE, SO I ASSUMED I JUST DROVE PAST SOMETHING THAT SMELLED BADLY. ON SUNDAY THE SMELL RETURNED, STRONGER. I STOPPED AND SHUT THE ENGINE OFF, AND SMOKE BEGAN POURING OUT FROM UNDER THE LEFT SIDE OF THE DASH AS I RAN TO DISCONNECT THE BATTERY. ONCE THE SMOKE CLEARED AND THERE WAS NO CONCERN OF A FIRE BREAKING OUT I BEGAN TO INVESTIGATE THE CAUSE AND FOUND THE "SMART ENTRANCE CONTROL UNIT," WHICH IS MOUNTED TO THE FAR LEFT SIDE OF THE VEHICLE UNDER THE DASH AND CONTROLS THE POWER LOCKS AND KEYLESS ENTRY, TO BE NOTICEABLY HOT. I UNPLUGGED THIS BOX AND REMOVED IT FROM THE VEHICLE. THE BOX HAD HEAT VISIBLE DAMAGE ON ITS EXTERIOR. I OPENED THE BOX TO INVESTIGATE FURTHER AND FOUND A LARGE ELECTRICAL COMPONENT THAT I BELIEVE WAS A METAL OXIDE VARISTOR WAS THE SOURCE OF THE HEAT/SMOKE/POSSIBLE FIRE, AND NEARBY COMPONENTS SUFFERED SIGNIFICANT HEAT DAMAGE. I THINK THAT THIS CATASTROPHIC FAILURE OF A COMPUTER MODULE MAY BE A SAFETY DESIGN FLAW. IF I HAD NOT BEEN AWARE OF THE ODOR AND PULLED OVER AND QUICKLY DISCONNECTED THE BATTERY, THE VEHICLE COULD HAVE CAUGHT ON FIRE. THIS COMPUTER IS POWERED EVEN WHEN THE VEHICLE IS TURNED OFF, SO IT COULD HAVE STARTED A FIRE IN THE MIDDLE OF THE NIGHT AND CAUSED A HOUSE FIRE AS WELL. I CHECKED EVERY FUSE IN THE VEHICLE AND ALL FUSES ARE THE CORRECT AMPERAGE (NOBODY HAS INSTALLED A HIGHER CURRENT FUSE IN PLAC