BRAKE BOOSTER NEEDS REPLACED. BUT I MISSED THE EXTENDED WARRANTY. THEY NEVER NOTIFIED ME THAT THESE WERE FAULTY
2009 Mazda CX-9 brakes problems
severe 15 complaints filed with NHTSA · avg repair $450
Complaints
15
Recalls
0
Crashes
1
Avg fix
$450
What owners are reporting 3 most recent
WAS DRIVING MY MAZDA CX-9 IN AFTERNOON TRAFFIC WHEN THE CAR IN FRONT OF ME APPLIED THEIR BRAKES TO STOP. I WENT TO APPLY MY BRAKES AND THE PEDAL WAS HARD AND NOTHING HAPPENED...THE CAR WOULD NOT STOP. I THEN PLACED MY OTHER FOOT ON THE PEDAL IN ORDER TO APPLY MORE PRESSURE AND STILL NOTHING. HEARD A HISSING NOISE AND THEN REALIZED THIS CAR WAS NOT GOING TO STOP. "SCARED THE HELL" OUT OF ME AS I W…
HISSING SOUND WHEN BRAKE PEDAL IS PRESSED. PEDAL GETS REALLY HARD TO PUSH THEN IT GOES TO THE FLOOR WHEN ATTEMPTING TO STOP THE VEHICLE. IN A PANIC STOP IT FEELS THAT THE CAR WILL NOT BE ABLE TO STOP. I AM TOLD THAT THE BRAKE BOOSTER HAS FAILED. THE MILEAGE ON THE VEHICLE IS APPROXIMATELY 138,000 MILES.
Common questions
How serious is the brakes problem on the 2009 Mazda CX-9?
It's a meaningful issue. 15 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $450.
At what mileage does the brakes typically fail?
Mileage data is limited for this issue. Owners report failures across a wide range, suggesting cause is more about driving conditions and maintenance than mileage alone.
What does it cost to fix?
Independent shops typically charge around $450 for brakes repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to brakes?
No active recalls currently cover brakes issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Other problem areas on this vehicle
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Severity ratings are derived from reported crashes, fires, injuries, and fatalities.
Repair cost estimates are independent-shop national averages and may differ in your area.
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