Move the signal lever down (for a left turn) or up (for a right turn) to the stop position. The signal will self-cancel after the turn is completed.
If the indicator light continues to flash after a turn, manually return the lever to its original position.

The turn signal indicators in the instrument cluster flash according to the operation of the turn signal lever to show which signal is working.

NOTE
Turn and Lane-Change Signals
Lane-Change Signals and Three-Flash Turn SignalMazda 6 Owners Manual: Remote handle lever removal/installation
4SD
1. To remove the remote wire, remove the trunk side trim.
2. Remove in the order indicated in the table.
3. Install in the reverse order of removal.
5HB
1. To remove the remote wire, remove the trunk side upper trim and trunk side
trim.
2. Remove in the order indicated in the table.
...
Mazda 6 Owners Manual: Close Proximity Warning
If your vehicle rapidly closes in on the vehicle ahead because the vehicle applies
the brakes suddenly while you are traveling in headway control, the warning sound
activates and the brake warning is indicated in the display. Always verify the safety
of the surrounding area and depress the bra ...