WHILE DRIVING THE CAR THE REDUCED POWER MESSAGE CAME ON, DROVE CAR FOR ANOTHER 15 MINUTES HOME, AT HOME IN THE DRIVEWAY OPENED THE HOOD AND SAW THAT THE ENGINE WAS GLOWING RED ON PASSENGER SIDE, VERY HOT UNDER THE HOOD, WITHIN MINUTES FLAMES IGNITED AND BLACK SMOKE CAME FROM UNDER THE HOOD. WE RAN FOR WATER HOSE AND PUT OUT THE FIRE. VEHICLE NOW HAS MULTIPLE ERROR MESSAGES DUE TO DAMAGED WIRE HARNESS ACCORDING TO BMW DEALER, WIRE HARNESS WILL NEED TO BE REPLACED BEFORE FULL UNDERSTANDING OF THE CONDITION OF THE CAR CAN BE DETERMINED.