2025 Mazda CX-50 Hybrid Problems

When using adaptive cruise control, during SOME cornering, SOMETIMES the car brakes unexpectedly, very aggressively, without warning. Very dangerous, especially when another car is behind you.

1) Driving on an expressway and the red warning light goes on - two red bars with a sterring wheel in the middle. Car sounded an alarm that indicated we were going to crash. No cars in front of us. 2) Driving on the expressway with the cruise control on. Driving 75 miles an hour and the vehicle goes to 30 miles an hour and I have to accelerate. Thank the Lord no one was behind me. This has happened 3 times. I took it into Mazda and tool them the issue but they just did their regular maintenance on my car. There is a major issue with this vehicle and nobody wants to admit Need your help

First issue: Rough idle at start. The interior cabin vibrates enough to question the vehicle quality. The rough idle lasts about 40 seconds then engine switches to smooth vibration. It's actually unnerving. Second issue: it's well known in 2025 Mazda installed the Toyota RAV4 hybrid engine and transmission into the CX-50. The current ICE engine model had to be modified. As a result there are some structural issues that may become problematic. The front passenger door scrapes against the interior fender. During manufacturing to cover up the defect Mazda purposely offset the passenger side fender mask the defect. This should seriously can into question the structural integrity of the vehicle. The primary concern is by offsetting the fender have the impacted the ability of the crumble zones in this area? Additionally, the front passenger door may become stuck since there is no uniformity in the panel alignment. This should raise caution since the modifications necessary to accommodate the hybrid system my have impacted overall vehicle integrity.

Check engine light came on at 600 miles. Took it to the dealer and the code was a p3400 code, cylinder deactivation fault. The dealership replaced both solenoids, part #PYFA-12-360A, found metal in OCV valves. When we got the car back I changed the oil, cut the oil filter open and found large metal shavings. At about 1300 miles the same check engine light came on. Back to the dealership with the same code. Now Mazda says to replace the head.

On three separate occasions, while in reverse backing out of my driveway, the car failed to engage the transmission when shifting into drive, acting like it was in neutral. There were no warning lights or messages on the dashboard. The only way that I found to engage the transmission was to turn off the vehicle, turn back on, and move selector to drive. This is a safety issue as I've had cars approaching in both directions with the CX-50 behing immobilized and not able to move out of the roadway.

I bought the car new from Mazda in December, 2024, and I am the original owner of the car. I backed out of a parking space. I shifted my gear to D, but the car kept sliding backward. I quickly shifted the gear back to P, pressed the parking brake, and turned off my engine. I had to restart my engine several times before the car will drive forward in D. This incident happened twice already.

When using adaptive cruise control, during SOME cornering, SOMETIMES the car brakes unexpectedly, very aggressively, without warning. Very dangerous, especially when another car is behind you.

Brake pads loose / moving inside the shims of overall Brake system for the vehicle . Making audio noise while driving and parking and stopping vehicle. Safety risk of brake Failure Minor Odor of fire/fumes

We have had this 2025 Mazda CX-50 hybrid for a couple of months. On January 21, 2025, my wife tried to start it after shopping at a Dollar store. All the warnings lights came on, blinking, and the car was unresponsive to drive. After repeated attempts to start the car, the warning lights, finally, did go off, but a message of "hybrid system malfunction have vehicle inspected" came on. It finally started and allowed her to drive home. The alert about the hybrid system went off. So far, it has not happened again. I called the service department, and all they said was to bring it in if it does it again. No one has looked at it. Really wasn't any risk to her since she was in town. But had it happened somewhere where she didn't have phone service, it could have put her at risk. I don't really know what happened, but the biggest thing is the worry that it will do it again.

First issue: Rough idle at start. The interior cabin vibrates enough to question the vehicle quality. The rough idle lasts about 40 seconds then engine switches to smooth vibration. It's actually unnerving. Second issue: it's well known in 2025 Mazda installed the Toyota RAV4 hybrid engine and transmission into the CX-50. The current ICE engine model had to be modified. As a result there are some structural issues that may become problematic. The front passenger door scrapes against the interior fender. During manufacturing to cover up the defect Mazda purposely offset the passenger side fender mask the defect. This should seriously can into question the structural integrity of the vehicle. The primary concern is by offsetting the fender have the impacted the ability of the crumble zones in this area? Additionally, the front passenger door may become stuck since there is no uniformity in the panel alignment. This should raise caution since the modifications necessary to accommodate the hybrid system my have impacted overall vehicle integrity.

Brake pads loose / moving inside the shims of overall Brake system for the vehicle . Making audio noise while driving and parking and stopping vehicle. Safety risk of brake Failure Minor Odor of fire/fumes