What is the small yellow light on the car's rearview mirror?
2 Answers
The small yellow light on the rearview mirror is part of the Blind Spot Monitoring System. When there are moving obstacles approaching or moving away from the side or rear of the vehicle, this light will illuminate to alert the driver of vehicles or pedestrians in the blind spot. This prompts the driver to exercise caution when changing lanes or turning, helping to prevent traffic accidents caused by blind spots. Additional relevant information is as follows: Notes: The rearview mirror is a tool that allows the driver, while seated in the driver's seat, to directly obtain external information about the rear, sides, and lower parts of the vehicle. For the convenience of the driver's operation, to prevent traffic safety accidents, and to ensure personal safety, all countries mandate that vehicles must be equipped with rearview mirrors, and all rearview mirrors must be adjustable in direction.
I've been driving for over 20 years, and it wasn't until I got a new car recently that I noticed that little yellow light on the side mirror. The first time I saw it light up was when I was changing lanes on the highway—it suddenly flashed yellow, and I instinctively stopped my movement. When I looked back, there was a truck rushing from the blind spot, nearly causing an accident! Later, I learned this is called the Blind Spot Monitoring System, which uses radar or cameras to scan the blind spots on the side and rear of the vehicle, lighting up a yellow light when there's danger. Yellow is the international standard warning color, remaining visible even in strong sunlight. Some high-end cars even combine it with audible alerts or steering wheel vibrations. This feature is definitely not just for show—it has helped me avoid several close calls. I recommend that car owners regularly clean the sensors, such as around the mirror or bumper, to prevent dust from causing false alarms. Safe driving starts with small details; getting into the habit of checking this light can significantly reduce lane-changing accidents.
