is it just oem glass or was there a tint film applied? spontaneous glass fracture is not common but can happen on rare occasion due to a defect in the glass that causes stress to rise to a point of breakage. small scratches in glass can cause the glass to "explode", i witnessed this in one of my material sciences labs many moons ago, the the surface scratching was only from a scotch-brite pad.Yesterday, September 22, 2012, I experienced an explosion of the tilting portion of my panoramic sunroof. The car is a 2012 Toyota Venza. No cars or trucks or overpass was around me when I heard the explosion. I have 2 parallel jagged lines going across the glass. I took it to the dealer but they said it was not possible to explode on its own and it must have been a rock so I have to go through my insurance. I'm frustrated that I have to pay $250 deductible that I know was a manufacturing defect after I researched and found hundreds with the same experience. I have a glass company coming tomorrow. I pray that the tint will be a match. My next car will not have a sunroof.
only a good failure analysis company can do the work needed to determine what happened, but only if you have all/most of the pieces.
my advice, get your deductible down to $100, then it wont seem so bad.