We were traveling across country from Michigan to Arizona. We were 50 miles outside Tucson, AZ on [XXX]. Traveling 80 mph in a 75 mph zone, in passing lane and felt like car exploded and all airbags deployed and we came to a quick stop. No major injuries to either of us. One vehicle incident, did not collide with anything or hit any debris. It was a clear day, road conditions good, no noises, lights etc. My husband was able to keep from rolling and we came to a stop with many semi's etc flying by, very scary. When we were able to safely get out and call 911, there was significant drivers side front end damage around tire area and inside near axle. Looked like something broke inside car, sheered off bottom of tire. Police arrived and had to push vehicle on to shoulder of road. He assessed scene and thought it had to be a mechanicla failure as there was no other vehicle or debris on site. We did contact our insurance company and subsequently it was totaled. We also have Toyota investigating what the cause was if it was a faulty part or mechanical failure. We have not heard back but did receive the "recording of time of crash". I have a short video of damage but I'm unable to attach it. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)