Why YSK: Since May 2018, all newly-built cars sold in the United States are required to have a backup camera and video display for the camera. Many car dealers, both used and new, will advertise the backup camera as some kind of added luxury or special option and try to charge you more for it. Don’t bite the bait and understand that it is 100% a legal mandate to have it, like seat belts or air bags.
In the forward direction I do sometimes get a false positive, but only enough to sound the (not very intrusive) alarm. The only time it’s actually stopped is when I was pulling out of a parking lot and the brakes applied. I never saw what it was in front of the car but another car honked, and a few people gasped so there was something. (2021 Toyota Sienta. Standard, boring family car)
Also I’ve actually been spared being hit as a pedestrian by auto stop on a Honda Freed.
My car’s reverse stop has saved me from a couple of dents.