I am concerned about spontaneously shattering sunroofs. I understand this has been reported in various vehicles manufactured by diverse auto manufacturers. Last week I was visiting my daughter in California. We were traveling in a 2005 Toyota Sequoia at 70 miles/hr when suddenly there was the sound of an explosion overhead. The vehicle seemed to lurch a bit but I am not sure whether this was from the pressure changes when the sunroof exploded or whether the driver may have turned the steering wheel slightly in response to the explosion. We exited the highway to inspect the top of the vehicle and found that the sunroof was broken in a symmetrical fashion with the central portion of it blown out. There was in retrospect only a small amount of glass in the space between the sliding roof panel and the broken sunroof which would indicate that the majority of the glass was carried away in the air. There was no evidence that anything had fallen on the vehicle. We were not going under an overpass and not close to any vehicles ahead of us. On reviewing the internet information on this problem it does seem that it is not an infrequent occurrence and probably their are many cases that go unreported. My son in law took the vehicle to Toyota and they indicated that this was an acquired problem with the vehicle and would not be covered by any warranty. I believe he is going to Toyota management to explore having Toyota fix this problem. I write to suggest that the ntsb place an alert to the general public asking for information on thusfar unreported cases of spontaneous shattering of sunroofs. This is a potentially very dangerous occurrence that could lead to accidents, injuries and death were the event to occur in an adverse scenario. Thank you for your attention.

- Crestview, FL, USA