2010 Mazda CX-9: brake failure

Filed Mar 27, 2018 · Brakes · 92,500 miles · OH

This is regards to the mazda brake booster issue for the 2010-2011 cx-9. This issue revolves around customer notifications. The extended warranty time is 7 years or 90,000 miles. Mazda mailed out a single letter to owners. Mazda stipulated that the extension was transferable, however they made no effort to notify any of the next owners, not a link on their website even. This means that owners who did not get notified will not know of this issue and may spend about $600-800 to fix the issue even though it is covered (outside a dealer). Due to this being a safety issue with brakes not performing as expected during normal use, this should have been a recall. Any significant loss of braking power during normal use will cause any normal human to panic. The federal safety agency issued this while thinking as engineers, not taking into account how the human feels behind the wheel of a car that is not stopping. There are multiple reports of people nearly getting into accidents due to this at https://www.carcomplaints.com/mazda/cx-9/2012/brakes/brake_power_boost_unit_failure.shtml and other sites around the internet. Will it take injury or death for the federal safety agency to act? My own cx-9 started having issues, and when I took it in, the dealer stated the cost, and did not even mention coverage. I had to look it up. Most people would not have. My car is 2,500 miles out of the extension and mazda would not cover it. This is ridiculous. If I didn't have the money to fix it, and got killed, would mazda be forced to recall?

Filed Jul 21, 2016 · Brakes · 122,000 miles · CT

Brake booster failed, dealership indicated it was under extended warranty. Brought in for repairs at no cost, mazda failed to acknowledge and do repair. Cost me 556.21 for a very serious safety issue that is under investigation. Would like to get reimbursed. Loss of brakes, unsafe to drive. Hissing sound from brakes when pressed

Filed Sep 24, 2014 · Brakes · 70,000 miles · CA

Same braking problem for which mazda issued an extended warranty in april of 2014, where mazda knows they have a defective part impacting the quality of braking, in which under pressure would generate a hissing noise and loss of braking power, extreme difficulty pushing the brake pedal (and complete loss of braking ability). Our incident occurred while traveling on interstate 10 at speeds exceeding 60 MPH and traffic slowing. As I attempted to brake to decrease speed with slowing traffic I realized the car was not slowing and I had no option but to quickly swerve to the shoulder to avoid making contact with the slowing cars in the lane. The problem continued and I immediately contacted my mazda dealership who recommended I immediately bring the car for service. Mazda obviously knows there is an serious issue as well as the federal safety agency (why aren't they forcing mazda to announce an immediate recall vs. Allowing an extended warranty?). I could easily see how this issue could lead to a critical accident or fatality. Come on the federal safety agency wake up... How about we sue you as not taking ownership and protecting public safety for known issues? Why place all the burden on the manufacturer? What even frustrates me further... When the car was brought in to be serviced, they don't even have the parts available.

Filed Jul 10, 2014 · Brakes · 41,000 miles · NC

Tl* the contact owns a 2010 mazda cx-9. The contact stated that the brakes failed intermittently. The contact mentioned that he had to apply force in order to stop the vehicle. The vehicle was taken to the dealer. The manufacturer was notified of the failure. The approximate failure mileage was 41,000. Updated 8/28/14*cn the consumer stated the dealer repaired the vehicle. Updated 09/15/2014

Filed May 14, 2014 · Brakes · 19,000 miles · AZ · crash

I filed a complaint through mazda in 2012 and it didn't go anywhere. I saw an article in USA today, regarding my vehicle stating that an investigation was started due to 7 reported incidents on brake failures which resembled my experience. I am now sharing my story as it could have resulted in serious injury. I was approaching an intersection and applied the brake but the car did not slow down, I pushed the brake all the way to the floor and the wheels squealed but the car did not slow. I let up on the brake and reapplied and that is when the car began to slow down. But, it was too late. I hit the car in front of me and launched it into the middle of the intersection. Thankfully, the light had just changed and the cross traffic was at a stop. When the police arrived, they noticed one skid mark on the driver side only which was around 200 yards. About 4 feet prior to impact, there were two skid marks, one on each side of the vehicle. They said that they had never seen anything like it and that I should take it to an independant person to get the brakes checked out. I have photos of this and sent all of the documentation sent to the insurance company and to mazda. I felt neither believed me and was very diappointed in mazda's response. Eventially, I gave up. We actually were going to sell the vehicle as I didn't feel comfortable driving it. However, after all of the responses I was getting about what I described as impossible with anti lock breaks or that it was a result of "panic breaking", I second guessed myself and we still have the vehicle. On a separate occassion 2-4 weeks prior to the accident on may 15, my husband was driving very slowly in a residential area and when he applied the brake, the car initially did not stop until reapplying. He rolled part way into the intersection. I was with him when this occurred.

Filed Apr 3, 2014 · Brakes, Electrical · 44,521 miles · CA

The vehicle stalls when idling at a stop light or in a drive thru. The vehicles motor begins to shake and then eventually dies and stalls out and the vehicle must be started again with the turn of the ignition. The braking system is also defective. When at a stop light and your foot is on the brake pedal. The pedal suddenly sinks as if the brake fluid in the master cylinder has drained fully and the brake pedal sinks all the way to the floor and the vehicle shoots forward even if your foot is on the brake. Another problem is in the power door lock system. There has been a time when the power door lock was stuck and the rear right door could not be shut. I had to drive the car to the dealership with the car door flopping all over the place. They were able to fix it at the dealership but could not figure out how it occurred. They were as puzzled as I was. The car was bought back in 2010 brand new from the mazda dealership. The reviews were good for the vehicle. Its the first mazda we purchased and is probably going to be the last.

Filed Mar 20, 2014 · Brakes · 31,000 miles · TX

I noticed a hissing sound when pressing the brake pedal today 3/20/2014 and loss of brake pressure. I notified the dealer and they promptly told me to bring it in right away to be looked at. I did however a google search for mazda cx9 brake issue and notice there are 7 other incidents with cx-9 brake issue explaining the same symptoms. "the federal safety agency complaints say that the problem causes a hard pedal, increased braking effort and reduced braking effectiveness. Some complaints allege that they hear a hissing noise during braking similar to the sound of air leaving the tires. No injuries or crashes have been reported." I showed the dealership the google search from the internet...pertaining to 2010 cx-9 brake issues. Mazda dealer sounds like they are aware of the problem...and should be taking proactive corrective measures to fix this problem.

Filed Dec 26, 2013 · Brakes · 38,000 miles · MA · crash

Driving in snowy conditions; brakes failed twice when I applied light pressure. First time, the brakes shuddered, but the car finally stopped after I applied hard pressure; the second time it happened, the brakes shuddered, and nothing happened when I first applied harder pressure. Eventually the car skidded, but it was too late.

Filed Nov 1, 2013 · Brakes · 52,000 miles · CO

Brakes would not work as usual. After "stomping" on brake, car continued to move for several feet. There were no warning lights of brake failure whatsoever. Took vehicle to dealer to be informed the master cylinder and brake power booster were out and the car was dangerous to drive. Very glad nobody got hurt. Couple issues: this brake failure is fairly widespread with this make/model/year as I've found from research. Why is there no recall? There's not even a technical advisory from mazda about this serious threat to drivers of this car. Does somebody have to get hurt first? Second, I get that parts go bad - but on something as important as the brake system, the car should sound some sort of alarm, light a dummy light....something to tell the driver to stop driving the car as they are in imminent danger. To not address at least this second issues is neglectful of mazda and the ntsb. To not address the mechanical failures by way of recall is also extremely negligent.

Filed Oct 5, 2013 · Brakes · 38,000 miles · CA

This individual brought the car in to the dealer complaining of high pitched squeaking sound from brakes. Dealership checked brakes and said nothing wrong. Picked up car next day and felt that car not riding well and let it sit in driveway for 2 days. Went to drive again and pedal was "hard" as if it was on the floor. Then whenever I pressed on the pedal, I heard a hissing sound as if air was letting out of tires. Car response for slowing to a stop much longer. Called dealer asap and arranged to drop car off that night. Dealer called next day to say good thing we dropped car off night before as there was little to no brakes left due to power booster failure. How was it that I could tell brakes were going but dealer could not? This is a leased car. 10 weeks left on lease. Past warranty. $800 repair. Clearly mazda is having an issue with the 2010 cx-9 power booster due to the number of complaints lodged on this site. The service department for the dealer worked very hard on my behalf and was able to get mazda to cover most of the repair, the dealer picked up another $200 and I had to pay $100. Fair I guess but since this is a serious issue mazda should recall the cars and do the fix for free.

Filed Aug 9, 2013 · Brakes · 55,000 miles · SC

I purchased this car from a dealer this year with $48,000 miles. It was in tip top shape. Recently the brakes are not working. It is not the brake pads, but a hissing sound in the line and no brakes. The cost to fix is around $1500 and I don't have a credit card or the money to fix at this time. In researching I am not alone with this problem. There are going to be some bad wrecks and problems if this is not addressed asap. I pray everytime I have to go out and stop really far behind pumping and trying to make them work.

Filed Jul 6, 2013 · Brakes · 42,000 miles · TX

Brakes failed due to faulty brake booster. Two others at the dealership had the same problem. Mazda could not immediately fix the problem because they are out of brake boosters and are not sure when any will be available. Indications are that this is a wide spread issue and should be investigated.