Carrier/rack problems of the 2013 Hyundai Genesis

My daughter was pulling onto the freeway from an exit and heard a loud snap. She realized that something seemed to have broken under her right tire. She managed to drive to the next exit and up to where she works. When she got out of her car, she and a friend looked underneath the car and realized that the axle was cracked and coming apart. She was able to drive home that next morning from work but noticed that it sounded like something was grinding or dragging. When she took it to Hyundai the next day, they claimed that she hit something. They explained that the front axle was broken and needed to be replaced. She is absolutely sure that she did not hit anything. Hyundai was very rude and called me (her mother) and stated that she had to have hit something. My daughter was very adamant that she absolutely did not hit anything but that the axle just snapped! in order to get it fixed right away, we were told by our insurance that we had to accept fault and make a claim. This is what we did in order to get it repaired right away, but we both know that the axle had to have been faulty to begin with. I have found other people with the same problem on the Hyundai santa fe and they encountered the same problem. I feel that there may be a problem with the axles on Hyundais and that this is something that must be looked into. Had that axle broken completely while my daughter was pulling onto a busy freeway, she could have been killed. I would like to see some action taken against Hyundai about the axles on her car.