Air Bag Not Deploy problems of the 2015 Toyota Sienna

My vehicle was recently stolen. It was recovered as a crashed abandoned vehicle by the glen ridge police department (case #19-20437). The vehicle suffered an apparent major frontal collision but the airbags failed to deploy (see images). I am reporting this failure for your investigative reference. I have no further details as it was not in my possession when the collision took place.

I was traveling west on rt 202 (butler blvd) in jacksonville, FL. My speed was 65mph and I was in the middle lane. I was driving and my son, christopher, who is disabled was sitting in the middle row center in his wheelchair which was anchored to the floor by four tie-downs. A car trying to pass us in the outside left lane hit my vehicle in the drivers side rear and caused us to spin in the roadway. After we came out of the spin we hit the concrete barrier dividing the roadway. My vehicle was totaled with extensive damage to front and frame. My son and I were slightly injured but not treated on the scene. My airbags did not deploy? not the ones in the front or the side airbags did not deploy? this is a conversion accessible vehicle that has been altered from the original. I have re-purchased the same type of vehicle and I want to be sure that the airbags are working? Toyota has already pulled the "black box" and started their investigation. I just want to be sure that I get the "true" cause of why the airbags did not deploy?.

The contact owns a 2015 Toyota Sienna. While at a stop light, another vehicle crashed into the rear of the contact's vehicle. The incident caused the contact to crash into the preceding vehicle. The air bags did not deploy. A police report was filed. The contact, the front seat passenger, and the rear seat passenger sustained unknown injuries that required medical attention. The vehicle was not diagnosed nor repaired. The manufacturer was made aware of the failure. The failure mileage was 54,000.