2024 Mazda CX-30 problems

Filed Nov 9, 2026 · Brakes, Electrical · VA

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 the federal safety agency 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

Filed Oct 29, 2026 · Driver assistance, Electrical · 10,000 miles · MA

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.

Filed Oct 19, 2026 · Driver assistance, Electrical · PA

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 the federal safety agency 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

Filed Oct 16, 2026 · Airbags, Electrical · FL · crash · 1 injury

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.

Filed Sep 9, 2026 · Transmission · FL

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.

Filed Aug 31, 2026 · Brakes, Driver assistance · IL

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.

Filed Aug 14, 2026 · Electrical · AZ

Reporting Product Defect in Mazda Vehicles I am writing to bring to your attention a recurring design flaw affecting current Mazda vehicles, including models such as CX30, MX30, and potentially the Mazda3 series. Following heavy rain or high humidity conditions, there is a consistent issue with the tire pressure sensor alarming and the smart key being unable to unlock the car doors. I have checked my key fob battery, RF function, car battery - none of these are the root cause. Despite consulting local dealerships and various Mazda forums, no one seems to have a definitive solution to this problem. Therefore, I am reaching out to report the existence of this product defect. This issue appears to be more prevalent during summer in Arizona - after the thunderstorms, this issue came up every time. Even with the heat here, it takes from several hours to 2 days for the affected part to dry out and function again.

Filed Aug 3, 2026 · Brakes, Electrical · NY

When I first got my Mazda CX30 2024 New lease ,my Breaks were very weak & didn't perform as new. Only 2 years later w 9K miles on it, Mazda states my breaks need to be replaced. My rotors need to be shave. A whole list of services on a car thats 2 years old. My concern is, break service at 9K confirm my car wasn't new and that Mazda put my Safety at risk w Old Breaks... Mazda is hiding somerhing about my breaks playing games...in the mean time I feel my safety is in jeopardy with defective breaks that maza should fully cover under warranty. Which they won't honor. Putting my safety in jeopardy

Filed Jun 16, 2026 · Brakes, Driver assistance · PA

What component or system failed or malfunctioned, and is it available for inspection upon request? The automatic braking turned on while I was accelerating. My car is available for inspection. How was your safety or the safety of others put at risk? I could have been rear ended because my car automatically braked at an unpredictable time in rush hour traffic with someone very close behind me. Has the problem been reproduced or confirmed by a dealer or independent service center? It has happened to me maybe 4 times before but the dealer hasn't been able to reproduce it. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? No. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? It first happened soon after I bought my car new.

Filed May 16, 2026 · Body, Fuel system · SC

[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)