NHTSA Complaint #11569176 — 2024 MAZDA CX-5

I have a 2024 Mazda CX-5 but this is in any model and year that has the Adaptive Radar Cruise Control. When you set the distance you want to follow the vehicle in front of you, you will go the speed you are going until you come to the space you have set for the vehicle in front of you. Your vehicle will slow to match that vehicles speed. If that vehicle slows down, you will slow down. What it doesn't do it turn on your brake lights so the vehicle behind you knows that your vehicle is slowing down. Sometimes if the vehicle in front of you slows down fast, so does your vehicle. You have no control how fast it does that, it just does it. Now if the vehicle behind you doesn't realize that your vehicle has done this, well it has been very close two times so far. I do not want my new car rear ended. I did not know it did this with the brake lights and Mazda doesn't tell you that you have no brake lights when this happens. Why would they have a setup like this. It is like brake checking the vehicle behind you. I do not use my cruise control for that reason. It would be nice to be able to use it on a new car but I do not want to get hurt or get someone else hurt by doing so. I did contact Mazda and they know it does that. This is what they told me "Case Number [XXX]   Hello. My name is Dominique. I am sorry that you have had some very close calls while slowing down while vehicles were behind you. As for the question you had asked about cruise control activating the brakes when your vehicle starts to slow down, it does not activate the brake lights. It is just like when you are driving without cruise control and you go to take your foot off of the gas pedal instead of using the brake to slow down, it would not activate brake lights either unless you actually mash the brakes, the same with cruise control. Thank you for being a part of the Mazda family. " Isn't that great. I am now a safely hazard or at least my vehicle is, and they are all like that. Who knew. Not me. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFOR