Warning
1. Disconnect the negative battery cable.
2. Disconnect the trunk lid harness connector, pull the trunk lid harness out from the cabin.

3. Disconnect the hooks, which secure the trunk lid harness to the trunk lid hinge.

4. Pry away the stay damper's band with a screwdriver.
5. Pry out the connecting part of the stay damper and the hinge with a screwdriver to disconnect them. Then remove the stay damper.

6. Remove the nuts, then remove the trunk lid.

7. Remove the bolts, then remove the trunk lid hinge.
8. Install in the reverse order of removal.
9. Adjust the trunk lid. (See TRUNK LID ADJUSTMENT.)
Trunk lid
Trunk lid disassembly/assemblyMazda 6 Service Manual: Cylinder head gasket
CYLINDER HEAD GASKET REPLACEMENT
Warning
Fuel vapor is hazardous. It can very easily ignite, causing
serious injury and damage. Always keep sparks and flames away from fuel.
Fuel line spills and leakage are dangerous. Fuel can ignite and
cause serious injuries or death and damage. Fuel ...
Mazda 6 Service Manual: Rear door speaker removal/installation
1. Disconnect the negative battery cable.
2. Remove the rear door trim.
3. Remove in the order indicated in the table.
4. Install in the reverse order of removal.
Rear Door Speaker Installation Note
Attach the speaker with the wiring harness placed in the groove of the door
unit panel.
...