If there is the possibility of a collision with a vehicle ahead, the beep sounds continuously and a warning is indicated in the multi-information display and the active driving display.

Smart Brake Support (SBS) (Some models)
Stopping The Smart Brake Support (SBS) System OperationMazda 6 Owners Manual: Rear View Monitor
The rear view monitor provides visual images of the rear of the vehicle when
reversing.
WARNING
Always drive carefully confirming the safety of the rear and the surrounding
conditions by looking directly with your eyes: Reversing the vehicle by only
looking at the screen is dangerous as it m ...
Mazda 6 Owners Manual: Combine sensor inspection
Caution
Be careful and do not allow the lateral-G sensor to fall. If by
chance it is subjected to strong impact, replace it.
1. Connect the connector.
2. Turn ignition switch on, verify the voltage between terminals B and E
under the following conditions.
If not within the specifi ...