Service Brakes Related Problems of the 2021 Mazda CX9

Table 1 shows one common service brakes related problems of the 2021 Mazda CX9.

Table 1. Service Brakes related problems of Mazda CX9

Problem Category Number of Problems
Service Brakes problems
4

Service Brakes problem #1

Hello, I have been to a Mazda dealer complaining of clicking and squeaky brakes for 2 years now. Dealer replaced both front and back breaks and rotors around 22k year ago and to my surprise the issues persist, currently vehicle is at 49k. There is a TSB( 04-001/22) out for my VIN and year, so they know its a manufacturing defect and all they do is throw white break grease and a month later the noise is there again when breaking , backing up. I am not the only one, people of reddit confirm this and so does a general google search. Besides that I love the car and the dealer was super cool about it all but I'm sorry, this is unacceptable, every time I go get an oil change I ask about a fix and nothing.

Service Brakes problem #2

6/29/2023--vehicle stopped suddenly with I-activesense system malfunction, dynamic stability control malfunction, engine malfunction, engine output reduced, front radar sensor malfunction. Dealer said these faults due to bad battery--replaced battery per service manager ozzie perez at lakeland Mazda. 9/10/2023--incident #2 with same faults as above with vehicle stopping suddenly at risk of creating a rear end collision. Lakeland service manager ozzie perez now said that the faults are due to a faulty erg valve. Lakeland Mazda and ozzie perez are absolutely clueless as to the root cause of this problem and are releasing the vehicle back to the customer with the potential of causing a significant collision that can result in serious injury and/or death.

Service Brakes problem #3

The driver side airbag did not deploy in a front end collision on the drivers side. When approaching a vehicle that had come to a sudden and complete stop, the brakes were applied hard to the Mazda cx-9 in order to stop, but after about 1 second they just totally let go and there was no braking at all and the Mazda continued to move forward until it slammed into the vehicle that was stopped. The mymazda app sent a message that stated that there was a brake system malfunctiom which is exactly what occurred and caused the accident.

Service Brakes problem #4

As I was driving downhill with minimal snow on the ground, I tapped my brakes about 7 times before they locked up. I went to turn to stay on the road and the steering wheel wouldn't budge causing me to go off the road, into an embankment. Vehicle was going about 5-10mph when this occured on a city street.


Service Brakes related problems in other Mazda CX9 model year vehicles:



CX9 Service Bulletins
CX9 Safety Recalls
CX9 Defect Investigations