I just demonstrated on how to remove the door panel on my 2014 mazda 3 sport.
How to remove mazda 3 rear door panel.
Lift the door panel straight up.
You will be breaking 2 plastic clips from the rear part but once you do it just pulls out.
This is not that easy because the space is limited but just keep pulling and force the rear end of the door panel past the b pillar.
Move the seat all the way back and tip the seat way back.
Starting at the bottom of the door panel gently but firmly pull the door trim from the bottom and pop it out of its clips working up.
Continue pulling out the pop rivets all along the bottom edge and sides of the door panel.
Tilt panel away from frame.
You may need to insert a flathead screwdriver or trim panel removal tool in between the door panel and metal frame to pry out the friction fasteners.
I just demonstrated on how to remove the door panel on my 2014 mazda 3 sport.
Lift the door panel up and off the door frame.