Hi im new to this forum and i hope you don’t mind me asking a question?Hi kpm no not the diagnostic plug if you look between the speedo etc and the steering wheel there is a plastic cover that pulls off, you should be able to see to the right of the steering column where the BCM is, it's covered in a plastic bag. If you need to get it out Hayes describe talking off the fascia to get access, but I was told the bottom half of the plastic fascia where the diagnostic plug is under the steering column is sonic welded to the main part of the fascia and can be prized off then super glued back on when you replace or repair the bcm. this does sound brutal but it depends how much time you want to spend talking it apart there is also a security bracket riveted around the bcm witch has to be cut/drilled off before you can get the wiring plug off, it's all good fun and skint knuckles. there are ads on ebay for cloning bcm's witch save you buying new keys locks etc. hope this is some help M.