Part no for s2 3b ignition switch

[220bhp]

I think my ignition switch has failed on my 1991 s2 3b , it has been playing up for some time having to turn the key several times before the starter will engage , especially when hot.
Now all the ignition lights come on and nothing .
the starter was reconditioned a couple of months ago so its not that.
there seems to be a few different part numbers for this .
Does anyone no the correct part no for a 3b < and is it just the switch that could of failed or would thr barrel cause this as well.

[UrS4boy]

Pretty sure the PN for the electrical part of the ignition (which is a known failure point) is 4A0905849B. Dealer only (aftermarket switches are hit and miss)

One DIY to use as a guide: http://12v.org/urs/ReplacingTheIgnitionSwitch.pdf

[GazzaG60]

id go with a 5 quid a ebay or ecp unit on 3b non imobiliser.