CONSUMER STARTED VEHICLE AND HEARD A LOUD POPPING SOUND. THEN, SAW SMOKE COMING FROM UNDER THE HOOD. HE SHUT OFF ENGINE AND OPENED HOOD. BATTERY HAD EXPLODED. BATTERY WAS FACTORY REPLACEMENT PART INSTALLED BY DEALER. *AK THE BATTERY HAD BEEN REPLACED THREE TIMES. CONSUMER WAS BURNED FROM THE BATTERY ACID. *YH