I want to replace the door attaching plastic snaps or pins. My old ones are well worn or missing and the door panels could be a lot tighter.

Are these parts commonly available or do I have to get them from Mazda?

There are the two top of the door (window base) and then several push-in larger ones around the bases.

Thanks

 

around were i live autozone or advanced auto carry those and homedepot also has some just have to pick the right ones.

 

Just call Ray @ Malloy and he'll get you what you'll need.