Multiple instances while driving on the highway with cruise control and lane keep assist on - on a bend slight turn the car veered into the other lane across the lane lines - even with other cars present. Additionally, it does not auto steer away from a blind spot collision - had I not noticed the car there would have been an accident.
2025 Mazda CX-70: adaptive cruise control problems
7 of the 53 complaints about the 2025 Mazda CX-70 describe adaptive cruise control problems.
- owner complaints
- 7
- of this car's complaints
- 13%
- recalls
- 0
Is there a fix? 3 service bulletins cover this area of the car. See below
What owners say
This happens often. On a trip to Florida of 1200 miles, it happened 12 times each way. After being slowed in the right lane by a car in front driving slower tan my set cruise speed, I signal and move to an empty (in front of me) left lane. Instead of accelerating to resume my set cruise speed, the car decelerates abruptly by as much as 10 mph. If a car is following me and most logically is expecting me to accelerate after moving to the left lane, that car's driver is surprised and risks rear ending me. I took the car in to service this issue. Mazda has a Service Alert (SA-007/24. The conclusion of the SA is basically it is what it is. I think that this is a serious safety issue. I have a 2016 Subaru Outback with adaptive cruise control and it never does this. Maxda's system is deficient. The NHTSB should analyze and compare adaptive cruise control systems.
This has occurred numerous times. Using the adaptive cruise control, the vehicle decelerates as I approach a slower moving vehicle. That is what it should do. When I move from the right lane to the open left lane, instead of accelerating back to the set cruise speed, the car decelerates as much as 10 mph before finally regaining its mind and accelerating to the set speed. I have had cars following me that are expecting my car to accelerate that are surprised that the car decelerates. This happens on straight roads with no car ahead of me in the left lane.
At highway speeds (>60 mph), the blind spot detection on the passenger side will alert that a car is present in the vehicles blind spot when no car is present. This will happen intermittently and will continue even if I begin the lane change process, it will continue to alert that the car is there. Additionally, and less frequently, the forward collision detection system will identify a car is in front of the vehicle causing a sudden slow down in the adaptive cruise control or an alert.
On multiple occasions I have had driver assistance system failures with the most recent occurring this past Saturday 8/2/25, which I have on dashcam. In this incident, I had adaptive cruise control set to short following distance. I had about 5 or 6 car lengths in front of me at highway speed and the lead car was far enough ahead that the car was not showing it on the interactive display. Another car changed lanes from the right to left in front of me right behind the lead vehicle. The car that changed lanes was not detected by the vehicle even though it was right in front of me. I was approaching the vehicle at a higher rate of speed and the car never attempted to slow eventually requiring me to depress the brake to cancel the cruise as the car was not responding to the fact that I was now right behind the car and had to brake to avoid a collision. On a separate incident a month or so ago, I was entering a center turn lane, waiting to turn into a gas station which required crossing of 2 lanes of traffic in the opposite direction. As I was entering the center lane with my signal on, the car detected the opposing traffic and slammed on the breaks nearly causing me to get rear-ended by the traffic behind me that expected me to enter the turn lane at the rate of speed I was going. Routinely, the car fails to detect vehicles in the blind spot. I can approach, pass, and clear a vehicle on the left (vehicle to my right) and the car will never detect that a car was there in the first place. Additionally, if a car is detected and then stays in the blind spot long enough, the car loses it and thinks the car is no longer in the blind spot.
The i-Active safety sense system in the vehicle shuts off in moderate rain. I believe it to be far too sensitive. the system complains that it cannot see the road and vehicles with the camera system. Inclement weather is when I need the i-Active safety sense the more. Earlier this week on my way to work, it disabled itself in very light rainy conditions. I had no trouble seeing but the system did. When this happens cruise control is completely disabled. I reported this to the dealer but they shrugged their shoulders. No one seems to test these systems in less than perfect weather. There are warning on the dash saying that i-Active safety sense is disabled.
The contact owns a 2025 Mazda CX-70. The contact stated while parking the vehicle, the brake pedal was depressed, however, the vehicle failed to stop as intended. The contact stated that while the brake pedal was depressed, the vehicle jerked forward and hit a huge rock before crashing into two trees. The contact stated that she may have nudged the cruise control switch, however her foot was still on the brake pedal. The contact lost control of the vehicle. The contact stated that the failure occurred in the Mountain America Credit Union parking lot. In addition, the contact stated that the air bags deployed and there was a lot of smoke in the interior of the vehicle. The fire department and the Police arrived on the scene. The vehicle was towed to a local lot. The vehicle was then towed to an independent mechanic for repairs. A Police report was filed. The contact was transported to the local hospital for treatment. The contact sustained a head injury, an injury to the left wrist, multiple contusions cuts, and bruises to both legs. The contact stated that she thinks the injuries to both of her legs were caused by the deployment of the air bags. The manufacturer was made aware of the failure but did not assist. The failure mileage was approximately 100.
Service bulletins that may apply
Related recalls
No recalls on record for this model year.
Questions about the 2025 Mazda CX-70 adaptive cruise
Is adaptive cruise control problems a common problem on the 2025 Mazda CX-70?
7 of 53 owner complaints about the 2025 Mazda CX-70 (13%) mention adaptive cruise control problems.
Is there a recall or service bulletin for this on the 2025 Mazda CX-70?
There are 0 recalls and 3 service bulletins for the same area of the car. Check them below with your VIN.
Other symptoms on the 2025 Mazda CX-70
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