About 1 month ago i noticed my car making a hissing sound when my foot was on the brake pedal at a red light or stop sign. if i was a long red light or in a drive thru for more than 5 minutes i noticed my car would begin to tremble. then about a week ago i noticed if i had to brake suddenly, the brake pedal was very hard to push down making it almost impossible to stop. i took the car to the dealer on 2/3/2020 and the technician mentioned that they have been having problems with the brake booster.
There are noises coming from the front tires, when driving. no one could pinpoint the problem. brake booster went out a couple months later.
The brake pedal became very hard to push. i assume it could be the brake power booster or brake master cylinder.
When i apply my brakes it sounds like they are releasing air, and they seem to be harder to apply them. it also makes this sound while i am stationary applying the brakes. i have 156k miles on the car, is this normal?
As noted by many on this site, i experienced a scary brake booster failure. complete loss of powered brakes which put my whole family in danger. this is a family car and i have small children so this is appalling that mazda would not issue a recall for this problem. i see that there was a tsb and associated extended warranty period for this issue but as many have noted on this site, the true failure tends to occur after the 7 year warranty period. i actually started noticing some issues with the braking on this vehicle years ago, but assumed that it just needed new brake pads and rotors as the car was getting older. if i had received some type of communication from mazda or nhtsa, then i would have known the true issue during the extended warranty. i only have 77,000 miles on this car, but since it is older than 7 years... mazda refuses to address the problem or take accountability for this quality defect. i paid for the repair myself. mazda has lost a loyal customer. shame on them for putting drivers and their families knowingly ...
The brakes are hard to push, appears spongy and makes a hissing noise when pressure applied.
Brake booster went out. almost causing an accident because the brakes went stiff. i absolutely can not believe this isn't a recall. i guess it takes a serious injury or lawsuit to become a lawsuit. i was told by mechanic ti have to have repairs at dealer. dealer is impossible to get a hold of for an appointment. i told them needs to be fixed asap and they booked me a week out!! so upset i drove and suddenly brakes stiffness. could barely apply pressure
Brake pad become very hard to push. i can't stop the car as usual.
Tl* the contact owns a 2010 mazda cx-9. while driving at any speed, the brakes lost power and the brake pedal was difficult to depress without warning. the contact called mazda of clear lake at 281-823-5000 (located at 20101 gulf freeway, webster, tx 77598) and was informed that the warranty was expired. the manufacturer was not made aware of the failure. the vehicle was not repaired. the failure mileage was approximately 100,000.
Having braking issues while driving on the highway as well as city streets the brake pedal is gets hard to depress and braking diminishes almost completely. according to research mazda has already identified the problem exists with the power brake booster. there is a defect in the rubber of the diaphram. instead of issuing a full recall mazda extended the warranty period. my car of course was just outside the warranty period so mazda would not do anything about it. this seems like a serious safety component that can cause an accident and kill someone. we had many close calls because of this defect in their product that caused our braking to be almost non existent. the brake booster was replaced on our own dime and the problem was fixed.
While driving in houston highway rush hour traffic attempted to apply brakes due to traffic stopped ahead. brake pedal was very difficult to press and made a hissing noise. after about 20-30 yards was finally able to bring car to a stop narrowly avoiding an accident. when took vehicle to mazda dealership was told it is the power brake booster that needs to be replaced. service tech stated this was a known issue with the 2010 cx-9's. mazda issued an extended warranty but customers were never notified so they could get the defective part repaired. my vehicle only has 83600 miles, so it is average mileage for an 8 year old car.
Vehicle pulsates while braking while driving fast or at slower speeds. the steering wheel does not shake. the brake pedal does not pulsate. the vehicle brakes were changed several times with new rotors and pads on all four tires. i noticed there was a recall on lower control arms #15v-451. it only was inspected at the time of recall but never changed. could it be possible that they are now worn and can be changed per the recall.*dt
Started getting a hissing sound from the brake booster and a hard to depress brake pedal.
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 nhtsa 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 nhtsa to act? my own cx-9 started having issues, and when i ...
Hissing sound near brake pedal followed by extremely hard pedal and much effort to stop.