My back window on my 2020 Acura RDX shattered while it was parked at school. When I opened my passenger door to put my backpack in, I heard some cracking. I walked around the front of my car and when I opened my driver’s side door, I heard and saw the back window glass falling inside and outside of my car. I viewed the cameras at school and could tell the glass had cracked earlier, but believe the hole in the glass occurred from a combination of the pressure change opening my door and the vibration from shutting the door. One of my fellow teachers who came out while I was looking at the damage searched online and discovered it is a known problem for my year and model car. I called the service department at my local Acura dealership and immediately drove there. The service tech told me that he believed it would be covered since it is a known issue although my car is out of warranty. Acura posted a Service Bulletin (22-014) on October 28, 2022 that includes the VIN of my car in the affected vehicles. The bulletin states that the rear glass can shatter or break with no external impact due to incorrect specification of the rear defroster grid. The service manager called me the next afternoon to tell me he spoke to an Acura rep and they would only cover half. I am responsible for paying almost $400 to repair my back window that Acura knows is a safety issue to break since there has not been an official recall. It is not safe to operate a vehicle with a broken back window, in addition to the issues of weather exposure and not being able to secure the vehicle from others being able to access it. This repair should be covered by Acura since they are clearly aware of this issue and my car was included in the affected vehicles, even though my car is not under warranty anymore. Windows breaking are a safety issue and should be covered by the manufacturer due to their negligence.