The contact owns a 2020 Acura RDX. The contact stated that after starting the vehicle, the vehicle started to warm up and the contact heard a loud pop coming from the rear glass. The contact stated that upon inspection, the contact became aware that the rear glass had shattered. No warning lights were illuminated. The contact called a glass repair company, and the glass was replaced. The local dealer was contacted; however, the vehicle was not diagnosed. The vehicle was repaired. The manufacturer was notified of the failure. The approximate failure mileage was 82,000.