Mazda Mazda3 2019 Owner's Manual page 225

Turn off the BSM while pulling a trailer

or while an accessory such as a bicycle
carrier is installed to the rear of the
vehicle. Otherwise, the radar's radio
waves will be blocked causing the
system to not operate normally.
If a Mazda genuine trailer hitch is used,

the BSM is automatically turned off.
In the following cases, it may be difficult

to view the illumination/flashing of the
BSM warning indicator lights equipped
on the door mirrors.
Snow or ice is adhering to the door

mirrors.
The front door glass is fogged or

covered in snow, frost or dirt.
The rear side radar sensor of the BSM

may be regulated under the radio wave
related laws of the country where the
vehicle is driven. If this system is used
abroad, it may be necessary to turn off
the system.
Refer to Rear Side Radar Sensor on
page 4-214.
The system switches to the Rear Cross

Traffic Alert (RCTA) function when the
shift lever (manual transmission) or the
selector lever (automatic transmission)
is shifted to the reverse (R) position.
Refer to Rear Cross Traffic Alert
(RCTA) on page 4-116.
i-ACTIVSENSE
▼ Blind Spot Monitoring (BSM)
Warning Indicator Lights/Display
Indicator/Blind Spot Monitoring
(BSM) Warning Beep
The BSM system notifies the driver of the
presence of vehicles in adjacent lanes or at
the rear of the vehicle using the BSM
warning indicator light, the warning sound
and the display indicator while the systems
are operational.
BSM warning indicator lights
The BSM warning indicator lights are
equipped on the left and right door
mirrors. The warning indicator lights turn
on when a vehicle approaching from the
rear in an adjacent lane is detected.
When the ignition is switched ON, the
warning indicator light turns on
momentarily and then turns off after a few
seconds.
When Driving
4-99