This Service Alert supersedes the previously issued SA listed below: The changes are noted in Red. SA-011/24 02/12/24, 06/06/24, 07/29/24 DESCRIPTION Mazda has developed factory recommended scheduled maintenance services that support all major vehicle systems. Mazda recommends dealers follow the scheduled maintenance tables as cited in the vehicle-specific workshop manual or owner's manual. Services performed outside of Mazda's factory scheduled maintenance are not recommended. These services are unnecessary and create unneeded expenses for your customers. SCHEDULED MAINTENANCE Refer to the applicable Workshop Manual or Owner's Manual for vehicle -specific manufacturer scheduled maintenance.
full bulletin at NHTSA ↗2012 Mazda CX-9 brakes problems
moderate Owners of the 2012 Mazda CX-9 have filed 130 NHTSA complaints about the brakes, typically surfacing around 58,766 miles at roughly $450 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See brakes across all vehicles →
Failure mileage
Complaints
130
Recalls
0
Avg fix
$450
| Model year | brakes complaints |
|---|---|
| 2008 CX-9 | 25 |
| 2009 CX-9 | 15 |
| 2010 CX-9 | 81 |
| 2011 CX-9 | 91 |
| 2012 CX-9 (this page) | 130 |
| 2013 CX-9 | 15 |
| 2014 CX-9 | 9 |
| 2016 CX-9 | 5 |
2crashes
1injury
When does it fail?
Of the 130 brakes complaints filed for the 2012 Mazda CX-9, here's the actual mileage breakdown — failures cluster heaviest at 50,000-75,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Of the 10 model years of Mazda CX-9 we track for brakes problems, this one carries the most owner complaints on file — 130.
Brakes accounts for 59% of every owner complaint on file for this vehicle — the dominant problem area across 9 categories tracked.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering brakes on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
Mazda has developed factory recommended scheduled maintenance services that support all major vehicle systems. Mazda recommends dealers follow the scheduled maintenance tables as cited in the vehicle-specific workshop manual or owner's manual. Services performed outside of Mazda's factory scheduled maintenance are not recommended. These services are unnecessary and create unneeded expenses for your customers.
full bulletin at NHTSA ↗Mazda has developed factory recommended scheduled maintenance services that support all major vehicle systems. Mazda recommends dealers follow the scheduled maintenance tables as cited in the vehicle-specific workshop manual or owner's manual. Services performed outside of Mazda's factory scheduled maintenance are not recommended. These services are unnecessary and create unneeded expenses for your customers.
full bulletin at NHTSA ↗Mazda has developed factory recommended scheduled maintenance services that support all major vehicle systems. Mazda recommends dealers follow the scheduled maintenance tables as cited in the vehicle specific workshop manual or owner's manual. Services performed outside of Mazda's factory scheduled maintenance are not recommended. These services are unnecessary and create unneeded expenses for your customers.
full bulletin at NHTSA ↗Some vehicles exhibit brake related concerns such as brake noise, brake judder or brake dragging. If you encounter a customer complaint for any one of these symptoms, refer to the following information to understand why symptoms may occur, and to better assist the customer in resolving their specific brake concern.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Owners describe brake booster failures across a wide mileage range (19,000–129,000 miles), with the most common zone around 25,000–75,000. The failure mode is consistent: brake pedal becomes rock-hard, requiring two feet or extraordinary force to depress, while stopping distance increases dramatically or brakes fail altogether. Nearly all complaints mention a hissing sound (air escaping from the booster) when the pedal is pressed. Some owners report the pedal suddenly goes to the floor with no resistance; others say it hardens unpredictably. A few report engine stalling when braking hard, attributed to vacuum loss.
Most critical: owners describe near-miss and actual collision scenarios—merging at highway speed with no brakes, rolling through intersections, swerving across multiple lanes, nearly hitting pedestrians or other vehicles. Many state they felt certain they would crash or injure someone.
Mazda issued SSP 93 (extended warranty, 7 years/90,000 miles) for the brake booster defect. However, owners consistently report never receiving notification and learning about coverage only after taking the vehicle in or researching online. The NHTSA investigation PE 14-005 was closed without a recall, covering only 2010–2011 model years. Owners charged $500–$1,062 for booster repair outside warranty; with labor and master cylinder replacement, total costs reach $843–$1,450.
Same Mazda CX-9 brakes reports on nearby years: 2009 · 2010 · 2011 · 2013
Failure modes owners describe
Brake booster vacuum leak / internal failure
Vacuum-powered brake booster loses vacuum integrity, either through internal seal failure or vacuum line leaks, causing loss of brake assist. Results in extremely hard brake pedal that requires excessive force to depress, or complete loss of braking function.
When: 19,000 to 129,000 miles; most commonly reported 25,000-75,000 miles
Symptoms owners cite: Brake pedal extremely hard to depress, requires two feet or extraordinary force; Reduced or complete loss of braking ability; Longer stopping distances; Hissing or squealing noise when brake pedal depressed; Vehicle stalls when brakes applied; Spongy or inconsistent brake feel; Brake pedal goes to floor with minimal stopping power; No warning lights before failure
Repairs/costs cited: Brake booster replacement, often accompanied by master cylinder replacement. Parts and labor reported: $843–$1,450; owners cite $500–$1,062 for booster alone. Many repairs performed outside warranty at owner expense.
Recalls/TSBs owners mention: Mazda issued SSP 93 (Special Service Program) extended warranty covering brake booster: 7 years / 90,000 miles for model years 2007–2013. NHTSA investigation PE 14-005 (closed) covered 2010–2011 model years only; 2012 not included in final recall. Many owners report no notification of extended warranty program. Some dealerships invoked warranty after owner inquiry; others denied coverage when mileage or ownership changed.
Master cylinder failure (concurrent or secondary)
Master cylinder fails, either contemporaneously with booster failure or as a result of booster-related vacuum loss. Causes spongy pedal, loss of pressure buildup, or complete brake failure.
When: 25,000 to 129,000 miles
Symptoms owners cite: Brake pedal feels soft, squishy, or spongy; Brakes must be pumped to build pressure; Pedal goes to floor with minimal stopping effect; Loss of braking power
Repairs/costs cited: Master cylinder replacement; typically paired with booster replacement. Repair costs $843–$1,450 including both components, labor, and brake fluid flush.
Recalls/TSBs owners mention: Covered under SSP 93 extended warranty (7 years / 90,000 miles) when diagnosed at dealer; terms vary by ownership and mileage at repair time.
Synthesized from 130 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 10 most recent
Brake pedal makes hissing sound when depressed like air leakage; intermittently very difficult to depress brake pedal with a lot of force applied (typically if pumping brake), leading to increased stopping distance/difficult stopping. Occurs when brakes depressed (soft pedal, air hissing); if depressed again in quick succession, very hard to press with significantly reduced stopping power.…
I put my vehicle in the Mazda shop last year 2017 for a recall and I mentioned that there was something I felt in my brakes they told me that it may be dust and by driving it will go away,Mazda knew about this problem they should have taken care of it then.my vehicle was taken to ourisman Mazda dealership about 2 weeks ago and I was told that it was my brake booster & master cylinder labor is…
For the past week, my 2012 Mazda cx-9 has been having issues with not braking. At first, I thought it was just my imagination, but every day this pas week, at least once a day, I go to push on the brake pedal and it won't move. The brake pedal is stiff as if I'm pushing on a block of cement. It's very scary, and I've almost hit several cars, and even almost hit a pedestrian. I am a mom and…
On january 7,2015 I was driving on the long island express way merging off the ramp back onto the high way when I couldn't break. My breaks didn't work. I kept on pressing them down and nothing was working. Trucks were all honking at me because I was merging without stopping. Finally I went off the ramp onto the grass. I called the dealership and was informed that there is a recall regarding this…
I had to push harder and harder on my Mazda cx9 brake pedal for my car to slowdown and to come to a complete stop . This happened when backing out of my garage and the brake is getting worse everyday on my way to work . On the day when I had to take my car to the mechanics , I had practically put both feet on the brake pedal for the car to stop . It was a terrifying experience that the car…
Drove ~600 miles with a failed brake booster. Found out via internet that Mazda had provided an extended warranty to cover this defect. When the dealership where I took the car tried to find the part it was on backorder with Mazda. The Mazda service manager at preston Mazda, john rosensteel, had one of his people drive to butler, pa from boardman, oh to pick up the part. I took the car to the…
Brakes do not stop vehicle immediately, it is hard to apply brakes.
Tl* the contact owns a 2012 Mazda cx-9. The contact stated that while driving at approximately 20 MPH, the brakes failed to operate. The contact mentioned that the brakes gradually slowed down the vehicle and stop independently. The vehicle was taken to an independent mechanic where they informed the contact that there was an unknown recall on the vehicle. The contact contacted riley Mazda (75…
Brakes were occasionally 'tight', had to be pushed very hard to get the vehicle to stop. When I pushed the brakes it sounded like air was being pushed out. Changed pads and brake fluid, flushed the air out. Only made it worse. Now the brakes are constantly 'tight' and after learning this is a common issue with this vehicle I'm going to replace the brake booster. Ridiculous that so many are having…
While braking normally for a stop sign, the brakes became hard to press and did not stop the car as normal. Hissing from the pedal area was heard and the car finally stopped halfway through an intersection after nearly standing on the brakes.
Had brakes trouble with your 2012 Mazda CX-9?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the brakes problem on the 2012 Mazda CX-9?
It's a documented issue but not catastrophic. 130 complaints have been filed. Repairs average $450 and most owners catch it before it causes a breakdown.
At what mileage does the brakes typically fail?
Across the 110 complaints that reported odometer mileage, most brakes failures cluster between 40,500 and 81,952 miles, with the median around 58,766. A quarter of owners report trouble before 40,500; a quarter make it past 81,952. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
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.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2012/Mazda/CX-9.
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. Some links on this page are affiliate links.