The contact owns a 2023 Honda HR-V. The contact stated that while the vehicle was parked outside in a nearby community parking lot and turned off, the following morning the contact discovered that the rear hatch door glass window had shattered. The contact stated that there was no impact on the window to have caused the window to become shattered. The cause of the failure was not yet determined. The local dealer and manufacturer were not yet contacted. The failure mileage was 18,000.