door lock repair - anyone?

[e30rapidic]

Has anybody fixed one of their door lock cylinders? I searched and came up with part 51-21-9-061-343. Sometimes I need to wiggle the drivers side key to get it to lock/unlock. Feels loose and like it could potentially break, an annoyance!! I've had the assembly out so know how it works but wondering of the above kit allows you to rebuild the lock and use the original key?
Thanks

[Jean]

I looked at it, and decided not to lol. I had a local locksmith re-key and rebuild 3 (doors and trunk) lock cylinders for me, ended up costing me $135 for a set of 3.