I am a new owner of a 2024 CX-5 and found that it is not as safe as they would like you to beleave. On the Adaptive Cruise Control, you set how far you want to have it follow the vehicle in front of you. OK really the way it works is you come up on a vehicle, say at 50mph. The vehicle in front of you may only be doing 40mph. OK, it will slow you down to match the speed of the vehicle in front of you. Neat. It will match the speed of the vehicle in front of you until you move to another lane or turn off the cruise. Again, neat. What Mazda doesn't tell you is that when your vehicle slows down to match the speed of the vehicle in front of you, you have no brake lights come on to let the poor vehicle behind you know that you just changed speed. When you match the speed of the vehicle in front of you, it does it right now. I have come very close to being rearended two times in the past week. I didn't know there were no brake lights coming on. Mazda didn't tell me that every time you come up to a vehicle you and it slows you down you brake check the vehicle behind you. Who knew. FYI!!!!

 

When the adaptive cruise control activates the brakes, the brake lights always come on.
At least in my CX-5 bought in 2023.

 

Same here (2020)

 

The brake lights always come on when using adaptive cruise control lmao. Try it at night and when you look back you can see how bright the taillights reflect when the car is braking for you. Make sure you have your lights set to auto and not off, because then you'd only be running the daytime running lights which causes your tailights to not be on. That may be why you've almost been rear ended...

 

When driving in traffic in a vehicle without Adaptive Cruise Control do you always use the brakes to slow down when letting off the accelerator is all that is needed?

 

I had a friend follow me and no they don't. I contacted Mazda USA and the told me the same thing. I think that is something they didn't think about. This what Mazda USA sent me.

Mazda case # 00171326
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. Have a great day. Oh happy days, I now have vehicles climbing up my ********.

 

I highly doubt that!
When the adaptive cruise control activates the brakes in my CX-5, the brake lights DEFINITELY always come on.

If I read this correctly the brake lights never come on when only taking your foot of the gas pedal and slowing down on the motor. The same as adaptive cruise control.
When you apply the brakes, the brake lights come on. The same as when the adaptive cruise control applies the brakes.

I'm sorry, but after reading this last remark and see that this is your first posting on this forum, I'm not sure if I should take your posting seriously.

 

In my 2022, when adaptive cruise uses the brakes the lights do illuminate. I had a wonder about that and had my wife follow and check when we first got it. I wonder 3 things:

1) is there video evidence of this on the 2024
2) is there another 2024 owner that can verify
3) if verified by multiple owners, is it related to istop being added (USA) and a programming error

 

When cruise control decrease speed, lights do come on...I was wondering also in the beggoning on cx30...I always see that on highway, like a red reflection on traffic sigs and cars behind me

I am sure that criuise control mwybe sometimes uses "foot of the accelerator" to decrease speed, but if someone braking in front of you, lights MUST and DO come on

Its like in the city when car brakes automatically

Cx5 2022 homura plus 2.5 non turbo here

 

1) How do you proof on a video that the brake lights are not coming on when the adaptive cruise control is braking? I mean, how do you know (other than by lighting up the brake lights) the cruise control is activating the brakes?
3) I have i-stop and the brake lights come on when the adaptive cruise control brakes. But when i-stop becomes active, the cruise control in my manual CX-5 is already automatically disabled due to the low speed.