2024 Mazda CX-30 Problems

The contact owns a 2024 Mazda CX-30. While driving 30 MPH, the vehicle experienced unintended braking. During the failure, the vehicle unexpectedly downshifted to first gear with a red circular warning light illuminated on the instrument panel with an audible chime. The contact stated that the "Smart Brake Support" feature could prevent the failure from occurring; however, the setting could not be saved and had to be manually disengaged. The failure mileage was approximately 10,000.

Since purchasing the vehicle, the braking system has activated on its own for no reason. Today, Oct 19, 2026, it was cold and it said the system was failing. My camera system fails when it rains. My 2024 Mazda CX-30 has 62,000 miles and is experiencing the exact catastrophic phantom braking and forward camera failures detailed in NHTSA Recall 24V649000 (Mazda Campaign 6824H). My VIN is currently excluded from the recall campaign, but the vehicle is a severe highway safety hazard due to spontaneous unprovoked braking

I am reporting multiple serious safety-related mechanical failures involving my 2024 Mazda CX-30, all occurring while the vehicle was covered under Mazda’s manufacturer’s warranty. At approximately 8,000 miles, my vehicle developed seized brake calipers. Despite bringing the vehicle to an authorized Mazda dealership multiple times, my concerns were initially dismissed. I continued operating the vehicle for thousands of miles before the brake calipers, rotors, and pads were replaced. This raises serious concerns regarding braking performance and the safety of myself and other motorists. On October 13, 2025, at approximately 41,000 miles, my vehicle experienced a complete transmission failure, leaving me stranded and requiring towing. The transmission was subsequently replaced under warranty. My vehicle has also unexpectedly shut down while being driven on public roads on multiple occasions. On July 10, 2026, the vehicle broke down on a narrow, winding, two-lane roadway. The vehicle displayed a message instructing me to place it in Park. These unexpected failures created dangerous situations, potentially exposing me and surrounding motorists to collisions, particularly where safe stopping areas were limited. Additional warranty-related failures have included oil leaks from the oil pan and timing chain cover, forward-facing camera and driver-assistance system malfunctions, and other mechanical concerns. These problems have been reported to authorized Mazda dealerships, and multiple components have been inspected, repaired, or replaced under warranty. Despite extensive repairs, I remain concerned about the vehicle’s overall safety and reliability. I am requesting that NHTSA investigate the repeated braking, transmission, and unexpected vehicle shutdown incidents. A relatively new vehicle should not repeatedly experience failures that could endanger its occupants and other drivers. I am concerned that these failures may indicate broader safety defects requiring inv

The contact owns a 2024 Mazda CX-30. While driving 30 MPH, the vehicle experienced unintended braking. During the failure, the vehicle unexpectedly downshifted to first gear with a red circular warning light illuminated on the instrument panel with an audible chime. The contact stated that the "Smart Brake Support" feature could prevent the failure from occurring; however, the setting could not be saved and had to be manually disengaged. The failure mileage was approximately 10,000.

Airbags did not deploy, sensors keep going off, car keeps over heating even before accident did take it in to Mazda to be fixed two months prior.

The contact rented a 2024 Mazda CX-30. The contact stated that while driving at highway speeds, an "i-ACTIVSENSE Partially Disabled Front Radar Malfunction" warning message appeared on the instrument panel. The contact attempted to exit the highway; however, the vehicle failed to stop upon depression of the brake pedal. The contact continued to pump the brakes and even engaged the emergency brakes, but the vehicle failed to stop. Due to the failure, the contact crashed into the vehicle in front of her as the "Vehicle System Malfunction, Have the Vehicle Inspected" warning message appeared on the instrument panel. The air bags did not deploy upon impact. The contact later sought medical attention for pain in her back; the other driver sustained injuries; however, the injuries are unknown as she did not seek medical attention from the paramedics that arrived at the scene. A police report was filed. The vehicle was towed from the scene to an independent mechanic, where it remained in their possession. Neither the dealer nor the manufacturer had yet been notified of the failure. The vehicle was not repaired. The failure mileage was 38.377.

I am reporting multiple serious safety-related mechanical failures involving my 2024 Mazda CX-30, all occurring while the vehicle was covered under Mazda’s manufacturer’s warranty. At approximately 8,000 miles, my vehicle developed seized brake calipers. Despite bringing the vehicle to an authorized Mazda dealership multiple times, my concerns were initially dismissed. I continued operating the vehicle for thousands of miles before the brake calipers, rotors, and pads were replaced. This raises serious concerns regarding braking performance and the safety of myself and other motorists. On October 13, 2025, at approximately 41,000 miles, my vehicle experienced a complete transmission failure, leaving me stranded and requiring towing. The transmission was subsequently replaced under warranty. My vehicle has also unexpectedly shut down while being driven on public roads on multiple occasions. On July 10, 2026, the vehicle broke down on a narrow, winding, two-lane roadway. The vehicle displayed a message instructing me to place it in Park. These unexpected failures created dangerous situations, potentially exposing me and surrounding motorists to collisions, particularly where safe stopping areas were limited. Additional warranty-related failures have included oil leaks from the oil pan and timing chain cover, forward-facing camera and driver-assistance system malfunctions, and other mechanical concerns. These problems have been reported to authorized Mazda dealerships, and multiple components have been inspected, repaired, or replaced under warranty. Despite extensive repairs, I remain concerned about the vehicle’s overall safety and reliability. I am requesting that NHTSA investigate the repeated braking, transmission, and unexpected vehicle shutdown incidents. A relatively new vehicle should not repeatedly experience failures that could endanger its occupants and other drivers. I am concerned that these failures may indicate broader safety defects requiring inv

What is happening with my car are the exact symptoms of the known Mazda Recall 6824H - where the Smart Brake Support suddenly engages for no reason and when it does not need to - which has almost caused me to be rear-ended a few times. This has happened at least 7-8 times since I have owned the vehicle. Apparently, my VIN does not fall under the cars that Mazda reports for the Recall, but nonetheless, my car is still malfunctioning as the Recall describes, which is a safety issue for me. The Recall also states: "Due to an improper program setting, affected FSC (cameras) were not updated from production mode to normal mode. As a result, all three systems described (HBC, SBS, LAS) will not work as intended." My cameras are definitely not working as they should. I have had it in for service, and the technicians have not done anything at all. The Recall should definitely be expanded to owners experiencing these issues. As I have stated above, this incident has occurred at least 7-8 times, so I'll just enter in the most recent time that it happened in the Additional Details below since I cannot enter all of them. Thank you.

I am reporting multiple serious safety-related mechanical failures involving my 2024 Mazda CX-30, all occurring while the vehicle was covered under Mazda’s manufacturer’s warranty. At approximately 8,000 miles, my vehicle developed seized brake calipers. Despite bringing the vehicle to an authorized Mazda dealership multiple times, my concerns were initially dismissed. I continued operating the vehicle for thousands of miles before the brake calipers, rotors, and pads were replaced. This raises serious concerns regarding braking performance and the safety of myself and other motorists. On October 13, 2025, at approximately 41,000 miles, my vehicle experienced a complete transmission failure, leaving me stranded and requiring towing. The transmission was subsequently replaced under warranty. My vehicle has also unexpectedly shut down while being driven on public roads on multiple occasions. On July 10, 2026, the vehicle broke down on a narrow, winding, two-lane roadway. The vehicle displayed a message instructing me to place it in Park. These unexpected failures created dangerous situations, potentially exposing me and surrounding motorists to collisions, particularly where safe stopping areas were limited. Additional warranty-related failures have included oil leaks from the oil pan and timing chain cover, forward-facing camera and driver-assistance system malfunctions, and other mechanical concerns. These problems have been reported to authorized Mazda dealerships, and multiple components have been inspected, repaired, or replaced under warranty. Despite extensive repairs, I remain concerned about the vehicle’s overall safety and reliability. I am requesting that NHTSA investigate the repeated braking, transmission, and unexpected vehicle shutdown incidents. A relatively new vehicle should not repeatedly experience failures that could endanger its occupants and other drivers. I am concerned that these failures may indicate broader safety defects requiring inv

The vehicle is experiencing premature transmission failure, since about 9,000 miles. Mazda has been dropping the ball at replacing it under warranty and we found out there are 3 other CX-30s that I know of with similar issues. I believe Mazda has a faulty transmission in these cars based off my findings and other complaints.

[XXX] fuel door assembly has come loose from body. It looks like the clips that hold it in place have become worn or loose by the weight of the gas nozzle or by the fact that the gas door will not close correctly and car wash machine has made it looser and it appears to not shut all the way, and the body colored panel has fallen off as a result and when you pump gas, the assembly moves may be possibly causing it to leak gasoline if the seal or gasket becomes dislodged because of the loose clips that hold assembly to the body panel. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The sunroof exploded. Was no external debris or damage. Glass pushed outwards. 47 degrees outside. Very sudden and scary.

I have a brand new Mazda CX-30 with less than 10k miles. I was not made aware of the seat material being highly flamible. Luckily I nor my kids were in the car when the seat caught fire due to a magnifying effect. Magnifying Effect (Sunlight): If a clear glass or plastic object (like a water bottle, eyeglasses, or even a certain type of air freshener) was left on the seat in direct sunlight, it could have acted as a lens, focusing the sun's rays onto a small area of the seat material. Over time, this concentrated heat could become intense enough to ignite the fabric, especially if it's dry and flammable. This is more likely to happen on a hot, sunny day. I brought this up with the dealership and their reply was to contact Mazda! YOU are Mazda!

The air bag warning system shows "passenger air-bags not engaged" If involved in any accident that requires passenger air-bags to inflate, they will not. Causing serious to deadly consequences. January 28 2025 the Mazda service department had our vehicle to recalibrating the system. Checking the problem after the service still show the same problem. Another Mazda CX-30 was brought over, and the same problem existed. Also a Mazda CX-5 was tested and no problem was found. This was the second time this problem has been returned to the Mazda Dealership. This problem has existed since purchasing this vehicle.

I was driving down the Highway and the sun roof just exploded send shards of glass everywhere and nothing had hit it or anything. It just exploded. When I got to the dealer the person ahead of me had the exact same thing and we compared pictures. It was scary, dangerous and really loud when it happened.

[XXX] fuel door assembly has come loose from body. It looks like the clips that hold it in place have become worn or loose by the weight of the gas nozzle or by the fact that the gas door will not close correctly and car wash machine has made it looser and it appears to not shut all the way, and the body colored panel has fallen off as a result and when you pump gas, the assembly moves may be possibly causing it to leak gasoline if the seal or gasket becomes dislodged because of the loose clips that hold assembly to the body panel. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Headlight module, ballast, bad noises from passenger side, under hood right next to passenger headlight.

Airbags did not deploy, sensors keep going off, car keeps over heating even before accident did take it in to Mazda to be fixed two months prior.