Table 1 shows one common engine and engine cooling related problems of the 2025 Mazda CX-5.
| Problem Category | Number of Problems |
|---|---|
| Engine And Engine Cooling problems |
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.
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.
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.
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.