While traveling on a hwy with my 2021 Nissan Kicks, me and my wife were sandwiched. A black SUV suddenly stopped in front of us causing us to rear end them going approximately 50-60 mph then we were rear ended. No air bag deployed and the passenger seat appears to have come off of its tracks. Nissan has been notified of this and should conduct an investigation. Not sure if the automatic emergency braking failed or if the car just did not have time to react.