CarComplaints.com Notes: The only area of real concern for 2010 Mazda CX-9 owners is the brake booster.

In 2014, Mazda extended the warranty on the 2007-2013 CX-9 brake booster to 7 years / 90,000 miles. However this extended warranty has expired, so buyer beware.

This Mazda CX-9 brake booster failure isn't terrible in terms of repair cost — it "only" costs $550 average to fix. However it is a safety issue when the brake booster fails as it increases stopping distance. Owners have reported having to stomp on the brake pedal, & crashes/injuries have been reported due to this CX-9 brake booster defect.

2.2

hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
70,560 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2010 Mazda CX-9 miscellaneous problems

miscellaneous problem

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2010 Mazda CX-9 Owner Comments

problem #5

Oct 252019

CX-9

  • miles

A D V E R T I S E M E N T S

I've had everything replaced on my car for the air system. When I'm traveling the air seems to work fine. When the car idol's for more than like 5 min the air starts blowing warmer and warmer. Had the car taken in more than once for this and they have replaced different things. The problem still keeps happening. I have read where other people have the same problem. Has there been any fix for this being I'm not the only one with this problem?

- Beverly Hills, FL, USA

problem #4

Sep 302019

CX-9

  • 128,000 miles
I was driving on a highway getting off an exit, and I had my kids in my car and all of a sudden as I am slowing down to come to a stop to turn off the exit my car steering and brakes locked up and everything shut down. Luckily I live in walking distance to the exit ramp because someone stopped and helped me push my car to my house. They had to put it in neutral but it was extremely hard to move the steering wheel. Never had any issues with leaks or anything like this. The car smelled like antifreeze and was running hot. I let it cool off. It was the water pump that was leaking and went out. It was not able to be driven. I researched this problem with this make and model and there is a lawsuit about this exact issue. There are all kinds of complaints and there definitely should be a recall.

- Chattanooga, TN, USA

problem #3

Sep 012018

CX-9

  • 111,000 miles
The rubber sealant on the front windshield is coming loose from the car. The heater nor the air conditioner is working. Uderneath the dashboard get very hot that I can drive the car

- Bronx, NY, USA

problem #2

Jul 122016

CX-9

  • 97,000 miles
I've own my 2010 Cx-9 since new, at 96K miles the bolt mount for the hatch back power lift ripped out of the sheet metal of the hatch with a piece of metal and bolt flying. I use the car only for private use and no heavy duty usage. Bolt looked rusted (sorry I through it away). The Mazda dealer tells me that it is a very uncommon occurrence, and that is not covered by Mazda. I see in blogs that it is not that uncommon. The bolt and metal breaking may cause glass breakage or damage to someone while the door is being opened. See: forums.edmunds.com/discussion/12710/Mazda/Cx-9/Mazda-Cx-9-power-lift-gate-problem www.mazdas247.com/forum/showthread.php?123815687-CX9-power-tailgate-issues

- Short Hills, NJ, USA

problem #1

Dec 192015

CX-9

  • 16,800 miles
While driving vehicle, at approximately 50 mph, sunroof exploded. Weather was sunny and approximately 18 degrees Fahrenheit. Driver's side heat was on and set at 73 degrees Fahrenheit. Sun shade and sunroof were closed. Sunroof had not been operated in a few months. No evidence of outside interference. No other traffic within 150 feet. Examination of remaining glass indicated upward bow, indicating pressure from inside pushing out, in my opinion. Road we were on at time was a state road in a rural area and we were travelling in a straight line, transitioning from a 2-lane highway to a 4-lane section approximately 1 mile from an interstate exchange. Road conditions were clear and dry. I have no plausible explanation for this occurrence? no police report was filed. Dealer service department closed on Saturday (day of incident), but will be contacted regarding extended warranty coverage. This could have resulted in an accident, if sun shade was open, exposing passenger and driver to flying glass. Therefore, I consider this an unexplained safety hazard.

- Wheatfield, IN, USA

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