AFTER ARRIVING HOME SAFELY FROM A LONG HIGHWAY DRIVE (7 HRS), OUR CAR SAT FOR ABOUT 5 HOURS. WHEN I STARTED THE CAR, I SMELLED SMOKE AND HEARD A UNUSUAL RUBBING NOISE UNDER THE HOOD. AFTER POPPING THE HOOD, I SAW SMOKE POURING OUT OF THE ALTERNATOR. I TURNED OFF THE ENGINE, WENT INSIDE TO GET A FIRE EXTINGUISHER. THE FIRE WAS STILL BURNING, BUT SEEMED TO BE INSIDE THE ALTERNATOR. I EXTINGUISHED IT AND HOPEFULLY SAVED SERIOUS ENGINE DAMAGE. THE CAR WAS TOWED TO THE DEALER, AND IS AWAITING SERVICE NOW.