Note
1. Pull the A section upward and remove the clip.

2. Rotate the B section of the front beltline molding in direction (2), along the direction (1) shown in the figure and remove it from the body.
Molding
Front beltline molding installationMazda 6 Service Manual: Front door speaker removal/installation
1. Disconnect the negative battery cable.
2. Remove the front door trim.
3. Remove in the order indicated in the table.
4. Install in the reverse order of removal.
Front Door Speaker Installation Note
Attach the speaker with the wiring harness placed in the groove of the door
unit panel.
...
Mazda 6 Service Manual: A-pillar trim removal
1. Turn the seaming welt over.
2. Disengage clips A using a fastener remover.
3. Pull the A-pillar trim, then disengage clip B (1).
4. Pull the A-pillar trim upward, then disengage clip B from the A-pillar
trim (2).
5. Pull clip B out, then rotate 45°.
6. Remove clip B from the grommet b ...