2012 Mazda CX-9: grinding or squealing brakes

Filed Nov 18, 2017 · Brakes, Electrical · WA

The mazda cx9 that we purchased has a acceleration problem when we go to stop.. Mazda has never been able to solve the problem completely.. We have had 2 brake boosters replaced under warranty. We feel the car is unsafe to drive and mazda has not addressed the problem. They tell us nothing is wrong with the car. It know also has transmission problems with squeaking and grinding noises coming from the car. This is a design flaw that has not been addressed.

Filed Aug 7, 2016 · Brakes · 107,000 miles · FL

Brake booster - when depressing the brakes (any time of day) there was a strange hissing noise, like air being released from a balloon. If the pedal was pressed closer to the floor there was a high pitched squeal. Brakes became very hard to press and the car became extremely difficult to stop. Luckily there were no card in front of me. A repair shop instructed me to check brake fluid (which was slightly low, and I filled it). This did not solve the problem. Brakes are even harder to press. From research I see that mazda has had this problem for some years now. They should recall these cars and replace the boosters before someone is killed. We have four kids in our house and this is our only transportation. The car is no longer under warranty so I will be left replacing this on my own.

Filed Jul 19, 2016 · Brakes · 51,000 miles · TX

Brakes became stiff and difficult to press. When brake pedal pressed to the floor, loud squealing noise heard from inside the cab. Stopping distance and brake pedal depression continue to worsen as time passes. This has now become so bad that we can no longer drive the car safely.

Filed Jun 24, 2016 · Brakes · 62,350 miles · MN

The brakes have become very hard to push, it takes all my might to get car to stop, and there is a squealing sound when pedal is pushed all the way down. Feels as if car isn't going to stop.

Filed May 6, 2016 · Brakes · 62,133 miles · NY

The brakes have become very hard to push, it takes all my might to get car to stop, and there is a squealing sound when pedal is pushed all the way down. Feels as if car isnt going to stop. This occured on the highway and I was lucky I was able to downshift to slow car and get off highway

Filed Apr 19, 2016 · Brakes · 95,300 miles · NM

Tl* the contact owns a 2012 mazda cx-9. While driving approximately 35 MPH, the brake pedal was depressed and a loud squealing noise emitted. After applying the brake pedal numerous times, the vehicle came to a complete stop. The vehicle was towed to the dealer and currently being diagnosed. The manufacturer was not notified of the failure. The approximate failure mileage was 95,300. The VIN was unavailable.

Filed Dec 2, 2015 · Steering, Transmission · 28,764 miles · VA

While driving on interstate 90 west in massachusetts, 5 miles from route 84, our awd cx-9 started making a very loud whining noise. Within 10 seconds, the car started bucking, making a grinding noise and the steering became difficult. I was able to maneuver to the left side of the road; I could not make it to the breakdown lane because of the car's condition. Once the car stopped, we smelled burning fluid and some smoke came out of the vents inside the car. The car was unable to drive on its own, the wheels seemed locked and the grinding noise was extremely loud when in drive or neutral. I had to call 911. The mass state highway patrol arrived and had to push us over to the breakdown lane while the car was in neutral. The the mass state police halted all traffic on the highway for this to occur. We sat in the breakdown lane for an hour waiting for a tow truck. This entire situation was very dangerous. I had a toddler in the car with us. The highway was only moving around 35-40 miles an hour and slowing at the time of the incident. The mass state highway patrol and tow truck driver stated that the car may have spun out or flipped if the highway was moving at speed due to such a catastrophic steering failure. The cx-9 had started making a occasional quiet whining sound in the days prior to the failure, on our drive from virginia to mass . There was no other warning, no warning lights on the dash at all. The car was towed to the closest mazda dealership and was diagnosed with an internal failure in the transfer case. The repair was covered under our power train warranty, as the car only had 28,764 miles at the time of the incident and is 3 years old.the mazda dealer said there have been numerous transfer case failures in awd cx-9s. I want to see this part recalled because this failure created a very dangerous situation for my family.

Filed Jul 16, 2015 · Brakes · 58,000 miles · FL

Upon starting car and putting car into drive, brakes would not stop the car initially and had to pump the brakes several times to eventually keep the car from rolling. When the brakes are pressed to the floor, there is a high pitched squealing sound as if there is a vacuum leak or something. I suspect that based on the other complaints and articles I have read that the brake booster has a compromised seal. This needs to be a recall item and very soon as many peoples' lives are being put in danger because of this common defect in the cx9 family of braking systems.

Filed Jun 26, 2015 · Brakes · 45,100 miles · WI

Just after shifting into drive from park, noticed high pitched squeal and hissing. Brakes had to be pressed all the way to floor in order to stop the vehicle at only 5-10 MPH. Then while driving sometimes brakes seemed to work fine and other times needed to depress brake pedal all the way to floor. Seems to be an issue that should be recalled given so many people having such an issue at low mileage.

Filed May 14, 2015 · Brakes · 69,856 miles · NJ

I reversed my vehicle into a parking spot and started hearing abnormal noise like brakes grinding, but was still present even when not moving. Having a car backround I knew it was more like air. Wasn't sure what it was, but because I already work at a dealership I decided to have one of my diagnostic techs check it out. He knew right from my description that it was probably brake booster related. Called my dealership that always services my car for an emergency drop off. Bringing the vehicle to the dealership, every time I braked the pedal would not go down all the way, go straight to the floor, or I'd have to double tap the brakes similiar to if I was driving on ice. When at stops I'd hear the air noise from the booster, and even when the vehicle was off the pedal goes to the floor. Sometimes I'd be coming to a stop and the brakes would grab suddenly and I'd slide forward on the seat & most likely into the steering wheel if I didn't have my seatbelt on. The problems with the brake happened at sudden stops, slow stops, and the noise of air was present at all braking. Check online for tsb brakes for my vehicle and see it is becoming a common thing. Vehicle is at the dealership currently & is out of warranty, but with this being such a well noted concern & other issues I've had I don't know what I will do.

Filed Apr 7, 2015 · Brakes · 31,653 miles · CA

Pulled out of my driveway this morning and tried to use my brakes -- heard a hissing, squeaking sound and the car didn't stop. I pumped the brakes several times was able to slow the vehicle down. Brakes felt extremely sluggish for the rest of my morning drive (dropping off my daughter at her school). At a stoplight the car stalled, which has never happened before. Took it to my mechanic who said the computer was kicking out multiple codes which seemed to be related to the brake booster system. He recommend I take the vehicle to a local mazda dealership b/c it might still be under warranty. The mazda dealer just confirmed that the problem is related to the supposedly known faulty brake booster system and a leak in the vacuum. Mazda will replace the parts for free and not charge any labor, either. Very scary issue -- I nearly hit several vehicles on my drive this morning and was lucky that the cars in front of my moved to avoid an accident. Mazda needs to recall all cars with this issue before someone is injured, or worse.

Filed Apr 1, 2015 · Brakes · 42,000 miles · FL

At varying speeds, the brakes are very difficult to apply. When applied fully, a loud squealing can be heard from the dashboard area. The vehicle is currently at a service center for evaluation.