NHTSA Complaint #11706279 — 2024 KIA SPORTAGE

While traveling at approx 65 mph on a clear, debris-free Alaska highway in -5°F temperatures, the panoramic sunroof of my 2024 Kia Sportage spontaneously shattered with an explosive sound. There were no vehicles in the immediate vicinity (nearest car was maybe 50 to 75 ft away) and no observation of flying debris or falling objects from overpasses. The failure appears to be a spontaneous glass breakage (SGB) incident potentially caused by thermal stress or manufacturing defect rather than external impact. Crucially, some of the remaining glass fragments and one large attached piece are displaced and flexed OUTWARD (upward toward the sky). There are also fracture lines in the remaining glass along and parallel to the sides of the vehicle as well as parallel to the front frame of the glass. They do not radiate out from a central point as one would expect from an object strike. This geometry to me indicates internal tension or cabin pressure release, as an external impact from a projectile would have forced the glass inward into the cabin. Additionally, there was very little glass in the vehicle cabin, certainly far less than one would expect given the size of the opening in the sunroof and the amount of glass missing. I have personally previously been in a vehicle whose side window was blown out from a vehicle kicked rock strike and in that case was showered with a lot of glass. Yesterdays catastrophic failure resulted in some glass intrusion into the passenger cabin at highway speeds, creating a severe distraction with sound was loud & sudden enough to potentially cause a loss of vehicle control. I am aware of similar reports regarding the 2023-2024 Sportage (and previous Kia panoramic sunroof class actions) regarding the use of ceramic glazing or assembly stresses that contribute to such failures. I request an investigation into whether the current model's panoramic roof assembly is capable of withstanding extreme thermal differentials and body flex.