Rear glass from hard top, spontaneous combustion
Tint the windows.. And if they have the factory tint on them go over that as well... The same happened to me... Since I tinted all the windows, even the the whole windshield ... I never had the problem again..
Had this happen when moving a car that had been out in sub freezing temps into a heated shop. A few minutes later bang! sounded like a backfire. Looked around to see what happened and noticed the rear window had shattered but was still in place. As soon as I touched it the small shards of glass dropped into the rear seat of the car. Uneven temperature change possibly combined with a flaw in the glass is my guess.


