There are 4 owner-reported driver assist & adas complaints for the 2021 Mazda CX-30in NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
The I-Activesense camera disables all the time while driving. It disabled cruise control, LKA and LKA warning as well as auto high beams. While driving at highway speeds, when the vehicle drifts slightly over the line it does not get corrected nor do I receive ANY warning. It's almost as if the system knows it's there but doesn't want to turn on. While I was driving one day, it was very windy and the wind blew my car into the other lane slightly and almost collided with a vehicle. If the system was working that would not have happened. The problem was addressed at the dealership and I was told it was "normal". I've watched many videos on this exact model and trim. It is supposed to put my vehicle back into the center of the lane if it drifts over the lines. I will also add that every time this happens, the weather is perfect and nothing is obstructing the camera. The warning lamps that come on are the sensors disabled, auto high beams, forward collision, and cruise control
The contact owned a 2021 Mazda CX-30. The contact stated that her husband was driving 60 mph on cruise control and while approaching a traffic light he depressed the brake pedal but failed to deactivate the cruise control and stop the vehicle. The contact stated no warning light was illuminated. The driver steered to the right and crashed into another vehicle. The contact stated all the air bags did deploy. The driver sustained leisure on his back and both legs due to the air bag deployment. The contact sustained leisure on her head, her nose, her left ribs, hips, and both legs due to the air bag deployment. The contact stated they both sought medical attention at a near hospital. The contact did not know in detail the injuries of the other individuals but did know both individuals sought medical attention. A police report was filed. The vehicle was not drivable. The insurance company deemed the vehicle a total loss. The vehicle was towed to an unknown location. A dealer was not contacted. The manufacturer had not been informed of the failure. The failure mileage was approximately 14,000.
AFTER TURNING LEFT AT A SIGNALED INTERSECTION ONTO A HIGHWAY THE AUTOMATIC BRAKING ENGAGED AND THE CAR SKIDDED TO A STOP IN THE MIDDLE OF THE LANE. LUCKILY NOBODY WAS BEHIND US. THERE WAS A CAR ABOUT 4 CAR LENGTHS AHEAD THAT WAS GOING THE SAME SPEED AND WAS NOT STOPPED. I PULLED OVER AND CHECKED THE FRONT SENSOR AND NOTICED A COUPLE BLACK FLIES ON IT AND BRUSHED THEM OFF.
Sudden, enexpected emergency braking when there was no vehicle or any other obstruction in front of me. Luckily, the distance between me and the car behind me was great enough to prevent me from being rear ended.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026