Table 1 shows one common service brakes related problems of the 2023 Mazda MAZDA3.
| Problem Category | Number of Problems |
|---|---|
| Service Brakes problems |
On 14th, 2026, while traveling at approximately 60 mph on the northbound 55 freeway near the katella exit, my vehicle suddenly began to shake violently without any prior warning. In response, I attempted to slow down by applying the brakes; however, the speedometer rapidly increased even as I maintained firm pressure on the brake pedal. Immediately afterward, the vehicle pulled sharply to the left, causing a complete loss of steering control and resulting in a collision with the center median barrier. Despite the force of the impact, the airbags did not deploy, raising additional concerns about potential safety system failures. At no point before the incident were there warning lights, alerts, or indications of mechanical or electronic issues. The vehicle had also undergone its regularly scheduled maintenance at the tustin Mazda dealership on January 2nd, 2026, just prior to the accident. Given the sudden shaking, unintended acceleration, loss of braking effectiveness, steering failure, and non?deployment of airbags, I believe this incident may involve one or more manufacturer defects affecting critical safety systems. I respectfully request that NHTSA investigate this matter. I also believe the vehicle’s event data recorder (edr) may contain information relevant to identifying the root cause of these failures.
Automatic emergency braking suddenly engaged while driving on the highway. The car decelerated abruptly to a complete stop, causing the driver behind to rear-end me. There were no vehicles or obstacles in front of the car when the brakes engaged - the closest car was at least 100 feet in front of me. This collision was clearly the result of a faulty automatic emergency braking system. I do not feel safe driving the car knowing this malfunction could happen again, especially at highway speeds. Sudden unexplained braking presents a huge safety hazard to all drivers, increasing the likelihood for collisions and injuries. There were no warnings or symptoms prior to the unexpected brake system activation. After the brakes activated mistakenly, warning beeps and “brake!” message appeared. Car has collision damage and has not yet been inspected by dealer. Police report filed.