There are 4 stored owner reports matching the driver assist & adas leading-label group for the 2019 Mazda Mazda3 in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 4 of 4 matching reports.
Open the full vehicle complaint log (all categories)was driving in a car park and it randomly braked thinking someone was infront of me but there was nothing and the car behind me almost rear ended. Already fixed the recall last year according to Mazda. This is extremely scary and not sure what would have happened if this was on a highway
The contact owns a 2019 Mazda Mazda3. The contact stated while driving 35 MPH, the brake warning light illuminated and the vehicle would brake suddenly without the driver depressing the brake pedal. The failure had become recurring. The contact had taken the vehicle to a local dealer where it was diagnosed and determined that the failure could not be duplicated. The vehicle had not been repaired. The contact researched online and related the failure to NHTSA Campaign Number: 19V907000 (Forward Collision Avoidance). The manufacturer had been informed of the failure. The failure mileage was approximately 15,000.
MAZDA DEALER IS REFUSING TO UPDATE SOFTWARE PER SSPC5 TO CORRECT A SAFETY ISSUE RELATING TO THE MRCC (MAZDA RADAR CRUISE CONTROL) UNLESS I FIRST AGREE TO HAVING MAZDA CONNECTED SERVICES INSTALLED ON MY 2019 MAZDA 3 SEDAN (CSP06). WHEN I PURCHASED MY NEW CAR MAZDA CONNECTED SERVICES WAS NOT INCLUDED IN MY CAR. I AM NOW BEING COERCED INTO HAVING MAZDA CONNECTED SERVICES INSTALLED INTO MY VEHICLE BEFORE THEY WILL CORRECT A SAFETY ISSUE REGARDING A KNOWN ISSUE WITH THE ADAPTIVE CRUISE CONTROL. MY VEHICLE IS STILL UNDER WARRANTY BUT UNLESS I AGREE TO HAVING THEIR TELEMETRICS CONTROL UNIT (TCU) INSTALLED, THEY REFUSE TO INSTALL THE SOFTWARE TO CORRECT THE DANGEROUS ADAPTIVE CRUISE CONCERN PER SSPC5.
TL* THE CONTACT OWNS A 2019 MAZDA 3. THE CONTACT STATED THAT THE VEHICLE FAILED TO IMMEDIATELY ACCELERATE AFTER THE BRAKE ASSIST WAS ENGAGED. AS A RESULT, THE CONTACT'S VEHICLE WAS REAR ENDED BY ANOTHER VEHICLE. THE AIR BAGS DID NOT DEPLOY. A POLICE REPORT WAS NOT FILED AND THERE WERE NO INJURIES SUSTAINED. THE VEHICLE WAS NOT TAKEN TO A DEALER OR INDEPENDENT MECHANIC FOR DIAGNOSTIC TESTING OR REPAIRS. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 7,000.
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.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Apr 28, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.