Rear Seat Back Frame Removal/Installation
1. Remove the rear seat cushion..
2. Remove the rear buckle installation bolt..
3. Remove the rear seat back..
4. Remove the headrest.
5. Open the fasteners.
6. Detach the hooks.

7. Remove the child-restraint seat anchor covers in the order of (1), (2) as shown in the figure. (5HB only)

8. Remove the push knob while remove the hooks in the direction of arrow shown in the figure.

9. Open the fastener, remove the fastener and striker cover.

10. Remove the bolt then remove the rear seat center armrest.(Vehicles with the rear seat center armrest)

11. Peal back the rear seat pad, release the pole guide tabs in the direction of arrow (3) shown in the figure, then pull out the pole guides in the direction of arrow (4).

12. Remove the screws, then remove the belt cover in the direction of arrow shown in the figure.

13. Open the fasteners.
14. Remove the seat back frame from the seat back pad by pulling it in the direction of the arrow.(5HB)
15. Remove the nut, then remove the rear seat belt.

16. Install in the reverse order of removal.(5HB)
Test yourself
A quick Mazda 3 quiz: every answer comes with an explanation and a link to the manual page.