TL*THE CONTACT OWNS A 2011 BUICK LACROSSE. THE CONTACT WAS INVOLVED IN A CRASH WHILE DRIVING APPROXIMATELY 40 MPH. THE CONTACT STATED THAT THE DRIVERS SIDE AIR BAG PREMATURELY DEPLOYED WITHOUT WARNING. THE CONTACT SUSTAINED A CONCUSSION. THE DEALER WAS NOTIFIED AND ADVISED THE CONTACT FILE A COMPLAINT WITH NHTSA. THE MANUFACTURER WAS NOT AWARE OF THE FAILURE. THE CURRENT MILEAGE WAS 6,000 AND THE FAILURE MILEAGE WAS 5,700. THE VIN WAS UNAVAILABLE. A POLICE REPORT WAS FILED.