I'm having the same problem with my front passenger door. Given the cost for new parts and labor, almost $500 in California at the dealership, I'm tempted to try your fix, but reading through several posts, it sounds like a nightmare to get the door panels off. Can you provide step-by-step instructions? Of course any photos you might have of your work would be greatly appreciated too. Thanks for your great fix!
It's not too hard I have had both front and back panels off, just be careful not to lock your keys in the car like I did
If you have an RX maybe other models are similar the door open lever inside has a screw in it
There are 2 big screws in the door pull shut handle inside.
There is a series of push in fasteners around the edge panel of the door, you just push the center in and they pull right out
There are 2 screws on the bottom of the door panel.
The power window switches pry up carefully they have clips that hold them in. There should be a panel screw under there too. Unplug the switches and set them aside.
After removing all the screws..
You should be able to remove the door now.. Pull down under the bottom lip/edge and pop the bottom out first lift up and you can remove it being careful to unplug any wires....
I edited my text in the first message it should be easier to read now...... I even had a hard time reading it.. LOL
I did this actuator on the rear door. The front door may be a little different or maybe easier. Let us know how it goes. It won't hurt that much to try the part is cheap enough. Check my edit from above a front door application may be easier as there are connecting rods to the key lock..