So I found a replacement door for my mazda 3 4 door sedan. I need to replace the passenger rear door. I found a good condition one but it is non powered and my car is power locks/window. Can I just use everything from my power doors and swap it in to the non powered door shell? Thanks for your help in advance. Tha car is a 2006

 

Should be able to. I imagine you'll just need to pop out the panel with the switch and replace it with the one from your car. You will have the round hole from the window crank to cover up somehow, though perhaps you can find a rubber or plastic grommet the right size at a hardware store.

 

as long as you swap out all the electrical stuff from your original door along with the door actuator for the power lock and you can also use your door panel on the new door so you don't have to cover the hole for the manual window crank.