So few days ago I was on the freeway checking out traffic around me, and I found the BSM on both sides will not light up when they supposed to with no error messages. So I turned the BSM off on the infortainment, turned it back on and yea they worked again. (NX250 with updated software)

So don't over rely on the BSM or any safety things on your car, you never know. Drive safe~

 

That's what spot mirrors are for.

 

Absolutely, check mirrors and other aids. Crazy though Mercedes Benz has commercials with their drives being saved by nannies; BSM and others. Bot good advertising to tout incompetent drivers. At least Lexus doesn't advertise that way.