Most people replace the entire steering lock mech. That would include 1, 7 & 10.

5 & 6 are the tumbler assembly.

2 is the threaded black cover.

I think 11 is part of the lock assy' (vac ports).

8 is the connector for the "key in" alarm, I believe that is also part of the steering lock mech.

EDIT: yours would be the "2nd version"

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Sonny


86 190D N/A 2.5L Auto 265k "Ruby" -Sold-
79 300D 242k "Condi" my first -sold- RIP
2013 chevy sonic hatchback - had to for work