That screw will not turn in any further. I recently replaced my ignition switch with one from advanced auto parts. cost $35 for a BWD brand. and it comes with that screw and the little metal "L" shaped plate.. The screw only has a few threads at the end, If I remember correctly it has something to do with holding the lock tumbler in. You can get the whole unit with new keys for $70 from advanced as well if you don't want to switch out your lock tumbler and use your original key. NOTE: the screws to hold the switch in are the tamper proof torx type. Meaning in the center of the screw head there is a post sticking up. A regular torx bit will not work.
Last edited by Buellstunter; 01-31-2011 at 06:28 PM.