Side/window Air Bag problems of the 2008 Lexus LS460

I have a 2008 Lexus ls46l with 1319 miles in which I was t-boned. When I got the green I proceed through the intersection. A vehicle approaching from the right failed to stop and t-boned my vehicle. No air bags went off and the sos system failed to work. The vehicle has now been repaired but it is at the dealership awaiting a new srs system since the srs light will not go off. (did not register or work at the time of the accident) what it is saying is that an airbag has been deployed. My question to Lexus was why was I driving a new vehicle with a defective srs system. Which leads me to ask are there other Lexus Ls460s out there with a defective srs module? what if I was in a head on collision?.