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The BSM may operate when turning at intersections in urban areas or with stationary objects on the road or the roadside (such as guardrails, sidewalls, and parked vehicles). If a Mazda genuine trailer hitch is used, the BSM is automatically turned off when the trailer's electrical connector is connected. When pulling a trailer other than with a Mazda genuine trailer hitch, or while an accessory such as a bicycle carrier is installed to the rear of the vehicle, turn off the BSM.
Otherwise, the radar’s radio waves will be blocked causing the BSM to not operate normally. The brightness of the BSM warning lights is linked to the panel light control.