Mazda 3 2018 Owner's Manual page 231

(With rear view monitor)
The RCTA warning indication in the rearview monitor also synchronizes with the Blind
Spot Monitoring (BSM) warning indicator light on the door mirrors.
WARNING
Always check the surrounding area visually before actually putting the vehicle in reverse:
The system is only designed to assist you in checking for vehicles at the rear when putting the
vehicle in reverse. Due to certain limitations with the operation of this system, the Blind Spot
Monitoring (BSM) warning indicator lights may not flash or it might be delayed even though a
vehicle is behind your vehicle. Always make it your responsibility as a driver to check the rear.
NOTE
In the following cases, the Blind Spot Monitoring (BSM) OFF Indicator Light turns on

and operation of the system is stopped. If the Blind Spot Monitoring (BSM) OFF Indicator
Light remains illuminated, have the vehicle inspected at an Authorized Mazda Dealer as
soon as possible.
Some problem with the system including the Blind Spot Monitoring (BSM) warning

indicator lights has occurred.
A large deviation in the installation position of a radar sensor (rear) on the vehicle has

occurred.
There is a large accumulation of snow or ice on the rear bumper near a radar sensor

(rear).
Driving on snow-covered roads for long periods.

Mazda3_8GE4-EA-17F_Edition1
When Driving
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