2025 Mazda CX-5

The vehicle exhibits a repeatable low-speed driveline-related problem consisting of pronounced clicking or clunking from the driver-front area, fore-and-aft jerking, and harsh engagement during deceleration and light on/off-throttle transitions, particularly around 15–17 mph; the behavior can become significantly worse over rough or uneven terrain. The exact failed component or system has not yet been identified. The vehicle is still essentially new, with fewer than 5,000 miles, and has not yet reached its first scheduled service interval, so it has not yet been formally inspected for this condition. No warning lamp or diagnostic message has appeared. Other owners online have described a similar low-speed clunking and jerking phenomenon, and Mazda has issued at least one prior transmission-related TSB addressing somewhat similar harsh shift behavior, although that bulletin does not appear to apply to this vehicle or this exact symptom. The vehicle is available for inspection upon request. The concern presents a potential safety risk because the vehicle can unexpectedly jerk, lurch, or abruptly change driveline load during ordinary low-speed driving, which can make accelerator response and vehicle speed less predictable in traffic, parking lots, intersections, or on uneven surfaces. The symptoms began within the first few thousand miles and remain repeatable.

On May 21st , 2026, while waiting in line to make a right turn (positioned 3rd in queue), the vehicles ahead moved forward. As I transitioned from the brake to the gas pedal to follow, the vehicle experienced an instantaneous engine stall and total electrical failure (NOT an i-Stop event). Pressing the gas caused the vehicle to slowly roll backward. When I immediately tried to reapply the brakes, the brake pedal became extremely stiff and nearly impossible to press down, failing to hold the vehicle effectively. The driver behind me began honking aggressively due to the imminent collision risk. I attempted to lower the windows to signal the other driver, but all electronic controls were completely dead. I had to quickly shift the gear into Park (P) and hit the start button to successfully restart the engine, which temporarily restored functions.

The vehicle exhibits unintended acceleration behavior when the brake pedal is applied. Instead of slowing down, the engine revs and the vehicle does not decelerate as expected. On March 16, 2026, while merging onto a highway and applying the brakes, the engine suddenly revved to approximately 3,500 RPMs while the vehicle failed to slow down. There have been previous issues with the vehicle not slowing when breaks are being applied, nut this is the first instance when it was noticed that the RPMs increased while breaking. This issue has also been reported to the dealership, with service documentation noting that when applying the brakes, the engine revs and the vehicle does not slow or accelerate properly. This creates a dangerous condition where braking input does not result in expected deceleration and may instead cause acceleration-related behavior. The issue has not been resolved. This issue significantly increases the risk of collision and loss of vehicle control.

While accelerating from a light that had just turned green, after passing through an intersection the vehicle seized up and came to a complete stop. There were no warning lights or any indication of a malfunction. The vehicle did not shut off, the wheels just stopped spinning. After a few seconds it began to accelerate again. It happened on a Sunday, I called the dealership Monday Morning. I was not comfortable driving it after that. They came to pick it up and take it for inspection. Fortunately, no other vehicles were around. This occurred 6 days after purchasing it new. They had it for 2 weeks and said they could not figure what the issue was.

I purchased this vehicle new in June 2025. About a month after the dealer service inspection, the vehicle suddenly would not start at all. The key fob sometimes cannot unlock the door, and I have to use the backup key to open it. After entering the vehicle, the engine will not start. I previously brought the car to the dealer for inspection, but they said no issue was found. Now the problem has happened again and the vehicle cannot start. This is a serious reliability and safety concern for a new vehicle.

Critical Malfunction- causing parking brake malfunction, anti lock brake system malfunction, Dynamic stability control malfunction, Disabled blind spot monitoring, Keyless entry system malfunction, Front brake / and obstruction warning disabled, Keyless entry system malfunction, Air Bag system and seat belt pre-tensioner system malfunction. Vehicle not starting./dead. Sat at dealership service where purchased for 6 days saying they could not test bc they did not have a battery tester- Magically when I complained they found one- and say everything checks out ok. Vehicle is not safe!!!! If this malfunction happened while driving I could have been killed. The dealership refuses to anything g but say it’s OK- and it’s not a lemon. I cannot put my life at risk and they will not guarantee it will not happen again- or say why it happened- other than check g the battery.