Comfort Access door lock
 

What mechanic part # do i need to purchase for my driver side comfort access door lock?
Recently, The driver side would open when i pull the handle. When i touch the side where the key goes in, it won't lock . It will lock once in a blue moon . Also Unlocks and Locks fine when i'm in a car wash.
All my other doors handle would open and lock
Is the driver side front and back interchangeable? I would like to put the rear locking mechanism to the front since i rarely use the back door to lock.