I FIRST NOTICED WHITE SMOKE COMING FROM THE BACK OF MY SUV. I PULLED INTO A STORE PARKING LOT AND TRIED TO PARK. MY MAIN BRAKES FAILED. I THEN TRIED USING MY EMERGENCY BRAKE. IT TOO FAILED. WHITE SMOKE STARTED COMING THROUGH THE VENTS SO I TURNED THEM AWAY FROM ME AND TRIED SHIFTING TO PARK WITH NO SUCCESS. I THEN PRESSED THE MAIN BRAKE AGAIN AND WAS ABLE TO SHIFT TO PARK. THEN SOMEONE IN THE PARKING LOT YELLED, "YOUR CAR'S ON FIRE! GET OUT!" I GRABBED MY KEYS, CELL PHONE AND WORK BADGE AND AS I WAS GETTING OUT, BLACK SMOKE BEGAN FILLING THE CABIN. STORE EMPLOYEES TRIED TO PUT OUT THE FIRE WITH FIRE EXTINGUISHERS WITH NO SUCCESS. WITHIN 10 MINUTES THE FRONT HALF OF THE SUV WAS ENGULFED IN FLAMES! I HAVE NO CLUE WHAT COULD HAVE CAUSED THE BRAKES TO FAIL NOR THE REASON FOR THE ENGINE TO CATCH FIRE! I HAVE VIDEO AND PHOTOS FOR VIEWING.