Looking at the parts list and owner's manual, it looks like the intrusion switch is part of the cooling shroud, part 3VPX5. I'm not seeing an independent intrusion cable part listing.   I've spoken to a handful of folks that taped the switch down after it broke and were happy with that. That would obviously disable the switch, though.   As for disabling it in the BIOS, I don't *THINK* you can disable it. I'll double check later today and update the post, if I see an option to do so.
Is anyone able to tell me if I can disable the intrusion warning in the latest bios on an r530 or tell me what the part number is for a replacement intrusion detection cable?
r530 intrusion detection cable