You can either notch the head of the bolts, or take a small sharp chisel and tap the edge of the head to loosen them up (that is how I take them out). To get the key assembly off, you have to take column cover off (there are several recessed screws on the bottom side), the steering wheel off, the multifunction switch assembly off, and the 2 security bolts out. Then unplug the harness and the key assembly slides off the end of the steering column assembly. When you go to put the key assembly back in, just find some regular hex headed bolts and use in place of the security bolts.