1. Remove the air filter.
2. Inspect the air filter.
Note

Air filter removal/installation
A/c unit removal/installationMazda 6 Service Manual: Coming Home Light
The coming home light turns on the headlights (low beams) when the lever is operated.
To turn on the lights
When the lever is pulled with the ignition switched to ACC or OFF, the low beam
headlights turn on.
The headlights turn off after a certain period of time has elapsed after the
doors ar ...
Mazda 6 Service Manual: Traffic Sign Recognition System (TSR) (Some models)
The Traffic Sign Recognition System (TSR) helps prevent the driver from overlooking
traffic signs, and provides support for safer driving by displaying traffic signs
on the active driving display which are recognized by the Forward Sensing Camera
(FSC) or recorded in the navigation system whil ...