There is a year old thread about the usefulness of the BSM but I want to know how it is suppose to work. My owners manual says "The BSM system notifies the driver of objects in the detection zones by illuminating the BMS warning light located in the outside mirrors in addition to sounding an audible (chime) alert and reducing he radio volume." I thought I detected a faint chime once but it was drowned out by the radio and I couldn't figure out how to increase the volume of the chime. I saw a YouTube video of a Jeep Cherokee and the video said the chime only comes on if you put your directional on. That would explain why my chime has never gone on. IMHO The light's size, location and brightness is just about useless. To see the lights I have to turn my head 90 deg. I would like to see the lights inside on the front pillars or have an adjustable volume/on/off audible come on the same time.