The front passenger and rear window regulators failed within 1 month of each other without any warning or symptoms. After inspection, it was identified that the plastic window regulator was completely shattered within the door. There was no damage to my vehicle that could have caused this. With the window regulator not working, my windows were not able to be opened or closed. The front window regulator actually got stuck in a down position. After some additional research online, I found several others who have had the same issues with the window regulators on their 2016 Hyundai Tucsons. This is a safety hazard because if I were ever be in an accident or a place where I need to exit through my windows and they are unable to go up and down for a safe exit. I have spent over $1600 in repairs to fix an issue that is clearly a defective part in the windows.