Mazda mx-5 2017 Owner's Manual page 201

In the following cases, the activation of the Blind Spot Monitoring (BSM) warning lights

and the warning beep may not occur or they may be delayed.
A vehicle makes a lane change from a driving lane two lanes over to an adjacent lane.

Driving on steep slopes.

Crossing the summit of a hill or mountain pass.

The turning radius is small (making a sharp turn, turning at intersections).

When there is a difference in the height between your driving lane and the adjacent

lane.
Directly after pressing the Blind Spot Monitoring (BSM) switch and the system

becomes operable.
If the road width is extremely narrow, vehicles two lanes over may be detected.

The detection area of the radar sensors (rear) is set according to the road width of
expressways.
The Blind Spot Monitoring (BSM) warning lights may turn on in reaction to stationary

objects on the road or the roadside such as guardrails, tunnels, sidewalls, and parked
vehicles.
Objects such as guardrails and concrete walls
running alongside the vehicle.
A Blind Spot Monitoring (BSM) warning light may flash or the warning beep may be

activated several times when making a turn at a city intersection.
Turn off the Blind Spot Monitoring (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.
Places where the width between guardrails or
walls on each side of the vehicle narrows.
The walls at the entrance and exits of tunnels,
turnouts.
When Driving
i-ACTIVSENSE
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