Both rear brakes locked up on separate occasion while driving on the freeway at about 70 mph. each time the brake engaged themselves and locked onto the disk/rotor. this caused the pads to burn up and produce a larger quantity of smoke. on one occasion the rotor became red hot, flame was visible, lots of smoke was being produced, and it warped rotor. every time it occurred i stopped the vehicle and turned it off. after the restart of the vehicle the brakes were not locked but the vehicle would shake as now the rotors were warped an the pads were destroyed. i took my vehicle to the mazda dealership and they informed me that i needed new pads, i did but it was due to the rear brakes locking up on their own. i got the pads replaced and 6 months later it happened again. this time i recorded a video on my phone and showed the dealer ship what i experienced again. this time they informed that i needed, new brake pads(again), rotors, and piston but they did not address what is causing the rear brakes only to lock up on their own creating excessive wear and damage to the brake components. something is and continues to engage my rear brakes. it last occurred on 10-04-19 and it has only been 3 days since the mazda dealer replaced the damaged parts and under hard braking the vehicle continues to shake which are early signs of what happened before, so its only a matter of time before it occurs again.
Brake lights come up intermittently, especially when temperature is low. also, front radar sensor system malfunction and smart brake system malfunction warnings come up also,. this is during the drive.
I was driving on the interstate and the tpms warning came on. i pull off the interstate and park. there is smoke coming from the right rear wheel and the center of the wheel is extremely hot, too hot to touch. i can feel the heat from about a foot away. there is metal pining and groaning as it cools down, the tire is warm, but not as hot as the center a the wheel. the left rear wheel is cool to the touch, as are the front wheels. i toggle the electronic parking brake a few times and after the wheel has cooled down i drive on. the problem did not occur again in the last 60 miles, however, the right rear wheel now makes a noise when brakes are being applied consistent with the rotation of the wheel.
This incident happened on 31st july, when my wife was driving this car on highway 4 martinez, ca at around 5.00 pm with our daughter (2 years old) returning from daycare. she was driving at approx 60 mile/hr, when the car started giving audio visual warnings on multiple failures and the car started slowing down without responding to the gas pedal and engine propulsion reduced to 'zero'. my wife panicked and was luckily able to pull over on the curb side safely, even though traffic was very high. she stopped the car and turned off the engine and waited for 10 mins and restarted the car multiple times and made sure that no more warnings are displayed, before driving again, however the 'engine warning light' stayed on. after a while she drove home almost 40 miles away very carefully without using any cruise control. here are the warnings, that came on during this failure, pictures attached. engine malfunction light. tire pressure indicator. stability control indicator. temperature indictor cruise control failure warning message 'front radar sensor system malfunction' warning message 'forward smart city break malfunction' after a day we dropped the car to mazda dealership for inspection and they found multiple failure codes and they did necessary repair (inspection and repair invoice attached). even before this incident , we reported multiple times to dealership that the car central information system abruptly shuts down during drive. but they always said that there was no problem. this incident on a freeway was very serious, my family or other drivers could have been in a injury accident because of this issue with mazda.
Driving to work in the morning at 5:45am on 06/05/2018 going 65 mph and my car cuts engine power and starts lowly declining pressing gas did nothing and multiple notifications flashing such as vehicle system malfunction, forward smart city brake support malfunction, smart brake system malfunction. i had to pull off to the side of the highway i can't even say i can pull off safely because all power was cut. so let the car sit for 5 minutes while off and then restarted and was able to make it work. i took pictures as everything was happening because i know the dealer ship will say something like "welp it ain't happening here so your car is fine." i am very fortunate when i bought the car i decided to lease the vehicle so i can just take the car back. these malfunctions seem like a very severe problem and i do not want to hang on to the vehicle. once 30k passes i will be super screwed! i called dealer ship and they are booked out 2 weeks so i cant even take the car in right away, plus they aren't even sure if they'll have a rental for me when i drop it off. also to mention, ac unit already had to be replaced, and a suspension recall. worse car i've had so far its sucks because mazda used to be so great. their service department sucks big time! i never had this type of service or issues this severe with my chevy. 08/07/2018 i took care in again for same situation along with ac and all mazda tells me is they are looking into and assure me it will be taken care of this time. (also said last time) i think that they do not know how to fix the issue! i called corporate to ask for a refund and give the car back and all the told me was to give dealership another chance to fix the issue. it is so unsafe to drive and have kids in the car, i am very fortunate to not have my baby nephew and nieces with me when these things were happening.
When driving at 35-50 mph, my 2016 mazda cx-9 periodically brakes suddenly while driving to a scrubbing forceful stop tossing things off the back seat, placing me in danger of a rear-end collision. sometimes a very quick beeping sound is made, "b-r-a-k-e" appears on the panel in large letters --- then the car automatically comes to a sudden stop or it occurs with no notice. i have taken it to the dealer 3 or 4 times only to be told that they could find nothing wrong. no objects of vehicles were immediately in front of me and the sensor was clean when this has occurred.this sudden stopping has occurred on the freeway, in rush hour traffic and on city streets. this has occurred at least 6 times since purchased 03/17/17. i am fearful that this problem will result in injury or death to me and others.
One mile from home the smart brake system malfunction & front radar system malfunction was displayed. car was shaking and acting as if the emergency brake was active while the car was in motion. car was slow to accelerate. had i been on the interstate i could have been rear-ended. pulled over to turn the car off and back on. car was okay the remainder of my 20 mile drive.