IN AN OPEN ASPHALT PARKING LOT WITH NO DIVIDERS OR POTHOLES OR ANY SURFACE MATERIAL OTHER THAN PAINTED LINE, WHILE DRIVING ABOUT ~ 15 MILES/HOUR I PROCEEDED TO MAKE A LEFT TURN. I TURNED THE WHEELS HARD TO THE LEFT WHEN I FELT LIKE MY VEHICLE HIT SOMETHING AND THE AIR BAG DEPLOYED. UPON COMING TO MY SENSES AND OUTSIDE INSPECTION OF THE VEHICLE, THE LEFT FRONT WHEEL ASSEMBLY CAME OFF THE STRUCTURAL MEMBERS WHICH HOLD IT TO THE AXLE/FRAME. TWO OF THE MEMBERS HAD BROKEN. THE WHEEL ITSELF WAS "LAID OUT" IN A ~ 30 DEGREE ANGLE WITH THE GROUND AND WAS SHOVED UP AGAINST THE FIREWALL. THIS VEHICLE IS A DODGE MAGNUM AWD RT MODEL WITH HEMI ENGINE. *NM