Mazda CX-9 2016 Owner's Manual page 432

Maintenance and Care
Scheduled Maintenance
Tab
Oil Change Reset
6–20
Item
In exible setting
Resets the remaining distance until oil replacement is due to the
initial value.
In xed setting
Resets the remaining distance until oil replacement is due to the
initial value. In addition, a vehicle engine control unit reset is
required as follows:
Press and hold the dashboard illumination knob with the ignition
switched OFF, then switch it ON. Keep pressing the dashboard
illumination knob for more than 7 seconds.
In OFF setting
Press and hold the dashboard illumination knob with the ignition
switched OFF, then switch it ON. Keep pressing the dashboard
illumination knob for more than 7 seconds.
Explanation
Dashboard illumination knob
Dashboard illumination knob