NHTSA I own a 2021 Nissan Titan. I am deeply concerned that I have defective Air Bags. I have had 2 collisions in my vehicle at high rates of speed and none deployed either time. I now fear that this vehicle will not protect me in the unfortunate case of another collision. I do understand they will not deploy under every condition, but I do expect additional protection outside of a seatbelt in a collision at a high rate of speed. In the first Collision, I was going 45 MPH. I had injuries to my neck and back. I had extensive work done to the suspension, drivers door, headlight, fender, bumper, grill, and the hood. In my second collision, a deer ran into my truck while I was traveling at 70 MPH. The head of the deer damaged the headlight and wiring harness, the bumper, grill, and hood and its body heavily damaged my passenger front door and fender. My passenger rear door also had some damage. No injuries occurred but the impacts should have caused a deployment. I am aware that there was a Recall on 2021 & 2024 Titans about the air bags having a delayed or failed deployment however I received no letter from this, neither is this in any of my printed service records. I would like Nissan to inspect my air bag system to see if thereas a defect that is causing them not to deploy or to make sure that my Titan was not missed in the group of trucks that had this defect, that way the recall can be extended to more 2021 Titans. I am in fear to drive this truck due to the fact that it may not protect me in the case of another accident. I am ready to purchase another Titan and have been loyal to the Nissan brand after owning 4 Altimas, 1 Armada, and soon to be 2 Titans.