Dangerous issue with cruise control

[TankKiller95]

I have about 23,000 miles on my 2025 BSBB. On 3 different occasions, while driving, with the cruise control on but NOT set, I let off the gas to slow down for a curve or to make an upcoming turn and the car keeps going because it has apparently set itself at the lower speed I have been traveling. On all three occasions I have been traveling at a higher speed on a major highway with the cruise control set. I turn off onto a side road, and while the cruise is still on I have not set it, usually because the roads are winding and not ideal for cruise. Yet somehow the cruise sets itself! Has anyone else experienced this?

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[RC Turner]

I think that what you are seeing is a difference in the way you are used to in turning on and setting the cruse compared to the way it was done in the past. I have found it very different but fairly easy to adjust to.

 

[kenmitch]

I think you're most likely inadvertently hitting resume with your left thumb and not realizing you set it. I'd suggest either keeping an eye on the pesky left thumb or looking at the cruise control indicator on your instrument panel. I guess you could make a habit of enabling and disabling cruise control on demand.

 

[TankKiller95]

I think you're most likely inadvertently hitting resume with your left thumb and not realizing you set it. I'd suggest either keeping an eye on the pesky left thumb or looking at the cruise control indicator on your instrument panel. I guess you could make a habit of enabling and disabling cruise control on demand.

I thought about that possibility, especially in the first two incidents when I was driving on back roads with lots of curves. I thought maybe I bumped the resume button without realizing it. However, when I looked down as I was applying the brakes, I noticed that the speed that was set was a lower speed than I was previously using. To further explain, when I was using the cruise control I was on a highway, and had set it at 60 mph. Then I turned on to the backroad with all the curves where I might reach 40 mph on some straight aways. When I looked down it had reset itself to 38 mph once, then 40 mph , and again around 40 mph. So I would have had to inadvertently touched the set/on button on the right side of the controls, not the resume button/toggle in the center. If I had hit the resume button it would have attempted to accelerate to 60mph.
Then the last time it happened I was on a long straight road that had a lower speed limit and when I let the foot off the gas to make an upcoming turn, the cruise had set itself on 40 mph. I knew my hand had not gone close to the controls because of the straight road.

 

[TankKiller95]

I thought about that possibility, especially in the first two incidents when I was driving on back roads with lots of curves. I thought maybe I bumped the resume button without realizing it. However, when I looked down as I was applying the brakes, I noticed that the speed that was set was a lower speed than I was previously using. To further explain, when I was using the cruise control I was on a highway, and had set it at 60 mph. Then I turned on to the backroad with all the curves where I might reach 40 mph on some straight aways. When I looked down it had reset itself to 38 mph once, then 40 mph , and again around 40 mph. So I would have had to inadvertently touched the set/on button on the right side of the controls, not the resume button/toggle in the center. If I had hit the resume button it would have attempted to accelerate to 60mph.
Then the last time it happened I was on a long straight road that had a lower speed limit and when I let the foot off the gas to make an upcoming turn, the cruise had set itself on 40 mph. I knew my hand had not gone close to the controls because of the straight road.

Regardless, it’s in the shop now for a different reason and I mentioned it to them, not that they will do anything about it because they probably won’t be able to replicate it. But I wanted it on record as happening in case others start to have a similar issue.

 

[Joeg]

This may not be relevant to your issue.

Do you have cruise or adaptive cruise control on? I only use Cruise control in the normal mode.
(What I mean is the way it has been for 40+ years.) Adaptive cruise control uses speed sign recognition, distance to the car in front of you, lane centering as well as GPS.
Tried it once, set my speed control for normal mode in vehicle or driver settings.
No adaptive speed control for me.

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