BSM stands for blind spot monitor, an advanced driver-assistance system (ADAS) that uses radar or ultrasonic sensors mounted in the rear bumper or side mirrors. It detects vehicles approaching or driving in areas the driver cannot easily see. When a vehicle enters the blind spot, the system alerts the driver, usually by illuminating a warning light in the corresponding side mirror.
Heard on the job
Check the wiring on the left mirror, the BSM indicator keeps flashing when there's no traffic.
Also heard as
- blind spot monitor
- blind spot information system
- BLIS