After 21 years, the drivers side door lock is finicky; sometimes it works, sometimes I jiggle the key for a while, sometimes I have to open the passenger side and crawl/reach across. Lubricating with graphite/lock lube works for a very short time. I know I would have to take the interior door panels off, but can I swap the locks from side to side? I know I can buy a replacement, but then my key wouldn't work.

 

i don't think so - one lock turns clockwise the other opposite

 

this COULD be limited by a spacer in the lock housing itself. Could be removed. If you’ve ever replaced a toolbox key or a desk key then you’ve probably seen where these can be swapped between a 180° and a 90°. This is speculation so do it at your own risk.

 

When working (I suspect worn tumblers) or on the passenger side I turn in one direction to unlock and the other direction to lock. I was concerned about physical fit.

 

You can get a new lock cylinder that is easy to key to your key.
1996-2017 Ford Lock Cylinder 7C3Z-1521990-A | TascaParts.com

 

i just remembered that i had a door lock - hope this helps

 

Didn't know I could make it fit my key. Tasca is good, but the descriptions are light. And I just placed an order for a xenon bulb for my Focus ST3. This is the right way to do it, at a good price.

 

I e-mailed Tasca and they were able to amend my order Cost me another 80 cents in shipping. Thanks for the tip kd4gij