WHILE TRAVELING APPROXIMATELY 55 TO 60 MPH VEHICLE WAS STRUCK ON THE SIDE BY ANOTHER VEHICLE CHANGING LANES AND TRAVELING IN SAME DIRECTION. THIS IMPACT CAUSED DRIVER'S SIDE AIR BAG TO DEPLOY. DRIVER RECEIVED SEVERE FACIAL INJURIES AND BURNS. NO DETERMINATION HAS BEEN MADE AS TO WHY THE DRIVER'S AIR BAG DEPLOYED DURING A NON-FRONTAL CRASH. PLEASE PROVIDE ANY ADDITIONAL INFORMATION / DOCUMENTATION.*AK