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Hi. I've been reading the threads about door lock problems. I'm sure my problem isn't one that someone hasn't previously experienced, but I can't seem to find too much other info on my specific problems. I'd like to have an idea of what may be the issue before tearing into the door, so any and all ideas are welcome. Thank you!

I've been having issues with 3 of the 4 door locks for about 6 months now, and it's getting progressively worse.

On the front passenger door, the door lock simply doesn't work. There's so obvious sound coming from it, and it doesn't even try. I'm guessing the actuator is broken (?).

The 2 rear doors are having a different problem, though. At any time, whether I attempt to lock or unlock the doors from my driver-side switch, one, neither, or both of the rear door locks will work. For example, if I try to unlock, one of them may go up, or may not. When I try to lock, one of them may go up, or may not. Simply put, both rear locks may decide to work at any time. It drives me absolutely crazy, because when I want to open the rear doors, they don't work; but other times, when I exit the car, I'll see that one of them unlocks but doesn't lock.

I hope that makes sense. Thank you for any tips or assistance you can give!