Made an account just to pitch in my experience. My daily commute is 98% highway on a two lane road. 2022 M3 absolutely horrible experience using cruise or autopilot. Doesn't make much of a difference. Sometimes it helps a little bit to disable autopilot and just use cruise and ride the shoulder of the road, but then again it only seems to help some of the time. Like others said most often it is caused by an oncoming semi, although quite frequently I've had it happen randomly with no vehicles in sight any direction. I mentioned it to tesla last time I got serviced when I was having issues with the auto wipers, basically I found that below -20 you can't use cruise control or autopilot because the wipers just come on full blast as heater for the sensor in the windshield can't keep up to the cold and just fogs up. I was hoping this was the cause of my phantom braking as well but now the temperatures are warm, the wipers are usually good, and the car still randomly brakes. They told me to record events causing it to happen and supply dashcam footage. Not sure how often it happens to you folk but I sucked it up for today and used my autopilot or cruise whenever I could on my drive today and here were my results:
Phantom Braking Events, January 27th:
11:44am Start driving
11:51am no nearby vehicles
11:56am oncoming semi
11:57am oncoming semi
11:59am oncoming semi
12:00pm oncoming semi
12:03pm oncoming semi
12:04pm oncoming semi
12:06pm oncoming semi
12:08pm oncoming semi
12:09pm oncoming semi
12:11pm no nearby vehicles
12;13pm oncoming semi
12:13pm oncoming semi
12:14pm oncoming semi
12:17pm oncoming semi
12:35 End driving
2:00pm Start driving
2:39pm oncoming pickup
2:42pm no nearby vehicles
2:47pm oncoming semi
2:55pm End driving
4:28pm Start driving
4:41pm oncoming pickup
4:53pm oncoming car
4:55pm glare from sun?
5:00pm oncoming pickup
5:01pm no nearby vehicles
5:15pm End driving
Is it really happening this much to everyone else in this thread or is there something even more wrong with my car? Two dozen times for a car to randomly slam on its brakes while attempting to use cruise control on your daily commute is a little disconcerting.