I went outside to start my car to warm it up, i live in michigan and this happened during winter so it was between 15-25 degrees that night. i closed the door after i got out of my stationary vehicle, and the sunroof shattered. i did not close it hard, i do not slam my car doors. there was no chips or cracks in the sunroof previous to it shattering. i read online about nissan having a recall for their sunroofs in another vehicle, something about faulty glass temperment and/or they used a thinner glass to save money.