Door lock repair kit.

[ah]

I haven't got the part no. I wondered what there like to change,has anyone had any experience.[/code]

[Mungo1337]

Current part no is 51219061344. Apparently there are central-locking and non-central locking versions. A how-to guide here:

http://e30world.com/body/BMW-E30-lock-cylinder-repair

It sounds like the fiddliest bit is removing/reinstalling the lock in the door, particularly if it is a moredoor as there's less room to get in there. I'll tell you how it goes as I have one sat in front of me, gonna make a nice project over christmas

[fixedwheelnut]

[Tip] when you see the tumblers, some have a smaller tab on them, these are for the tail end of the barrell.
Make a note of where they are on the original barrell or you won't be able to remove the key in the deadlock position.
[/tip]