The Mazda 3 is a compact hatchback built by Mazda. Although the Mazda 3 comes equipped with a factory stereo and speakers, audio enthusiasts who want improved sound may want to consider installing new speakers in their car. Dollar for dollar, new aftermarket car speakers are one of the best ways to improve the sound of a vehicle.
Locate the screw cover, a circular piece of plastic, in the door release trim. Pry it open, and undo the Phillips screw that is located underneath it. When the screw is out, pry out the entire piece of trim.
Take the sail panel, the triangular piece of trim at the leading edge of the door and window, by prying it off with your panel tool.
Locate the screw cover underneath the door pull handle, pry it open and take out the Phillips screw underneath it.
Pry open the power switches panel on the armrest. Disconnect the wiring plugs and remove the panel.
Pry around the bottom and edges of the door panel to loosen it. Then lift the panel up and off of the door proper.
Undo the screws holding the speaker in place, disconnect the wiring and take the speaker out.
Connect the new speaker to the wiring, and screw it in place. Replace the door panel.
Find the screw cover underneath the door pull handle, pry it off and then remove the Phillips screw underneath it.
Locate the circular plastic screw cover, in the door release trim. Pry it up and then remove the Phillips screw that is located underneath it. Pry out the trim when the screw is removed.
Pry up and remove the panel with the power switches panel located on the armrest. Unhook the wiring plugs and remove the panel.
Pry around the bottom and edges of the door panel to loosen it from the clips holding it into place. Pull the door panel up and away from the door proper.
Take your Phillips screwdriver and undo the screws holding the speaker in place. Disconnect the wires, and then remove the speaker from the door.
Screw the new speaker into place after connecting it to the wiring. Reverse the initial steps to replace the door panel.