WHILE RETURNING FROM VACATION ON JULY 17, 2018, TRAVELING ON THE NEW JERSEY TURNPIKE FROM BOSTON, MA TO ARNOLD, MD, AFTER APPROXIMATELY TRAVELING FOR 4 HOURS, WITH A STOP 1 HOUR PRIOR TO A REST AREA, WE TOOK EXIT 7A TO PROCEED ONTO I-295 AND THE CAR SUDDENLY LOST ALL POWER. PULLED OVER TO THE SIDE, OPENED HOOD, SMOKE AND FLAMES COMING FROM THE ENGINE WITH NO WARNING. VEHICLE BURNED AND EXPLODED PRIOR TO THE FIRE DEPARTMENT ARRIVING. VEHICLE IS TOTALLY GONE AND THERE IS A METAL SHELL, THE ENTIRE CAR WAS IN FLAMES AND BURNED UP. THIS HAPPENED VERY QUICKLY WITH NO WARNING. CAR HAD APPROXIMATELY 61,000 MILES, EXTENDED WARRANTY, AND ALL REQUIRED MAINTENANCE HAD BEEN PERFORM BY THE LOCAL HYUNDAI DEALER IN ANNAPOLIS, MD.