1. Disconnect the negative battery cable.
2. Remove the trunk lid trim (liftgate lower trim). (See TRUNK LID TRIM REMOVAL/INSTALLATION) (See LIFTGATE LOWER TRIM REMOVAL/INSTALLATION)
3. Remove in the order indicated in the table.


4. Install in the reverse order of removal.
Inboard Combination Light Installation Note
1. Insert the inboard combination light into the trunk lid (liftgate) as shown in the figure, then pivot it inward and fix in place.

2. Pleace the bracket in the proper position as shown in the figure and press it to the trunk lid (liftgate) to attach.

Rear combination light removal/installation
High-mount brake light removal/installationMazda 6 Service Manual: Electrical parts
Battery cable
Before disconnecting connectors or removing electrical parts, disconnect
the negative battery cable.
Wiring Harness
To remove the wiring harness from the clip in the
engine room, pry up the hook of the clip using a
flathead screwdriver.
...
Mazda 6 Service Manual: Replacing Exterior Light Bulbs
Headlights (With LED headlights)
Low/High beam bulbs
The LED bulb cannot be replaced as a single unit because it is an integrated
unit.
The LED bulb has to be replaced with the unit. We recommend an Authorized Mazda
Dealer when the replacement is necessary.
Headlights (With halogen headlight ...