Driving on I80E in Iowa with cruise control set at 70 mph, warning light for AWD failure came on, followed by engine light and all warning lights. Coasted into breakdown lane and had definite loss of power. Became aware of fire by fellow motorist running toward the car with fire extinguisher. Saw black smoke and fire coming from front of car. Forced to evacuate car on interstate, smoke in east and westbound lanes. The car was consumed in about 20 minutes. Insurance company- AAA - has inspected car. Unknown if Lexus has inspected. Remains taken to Teoâs Towing 563-888-1988. Please inspect. Air bags did not employ.