DRIVING ON HIGHWAY, BEGAN HEARING A HIGH PITCHED HUMMING NOISE, BEGAN SMELLING A BURNING RUBBER SMELL, PULLED OVER TO SIDE OF HIGHWAY, AND SMOKE BEGAN COMING FROM UNDER THE HOOD. WITHIN 10 MINS, THE FRONT END OF THE VEHICLE WAS COMPLETELY ENGULFED IN FLAMES. HAVE OWNED VEHICLE FOR A YEAR AND A HALF, AND HAVE HAD NO ISSUES PRIOR TO THIS INCIDENT. CAR SEEMED TO BE FUNCTIONING NORMALLY PRIOR TO THIS INCIDENT.