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.

1.7

hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
95,800 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 steering problems

steering problem

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2010 Mazda CX-9 Owner Comments

problem #4

Sep 302019

CX-9

  • 128,000 miles

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

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 212018

CX-9

  • 139,200 miles
Control arm/ball joints- had to have replaced again on 9/21/18 after both being replaced on 1/12/2016 as part of a recall. Feels like the car is trying to steer itself and not very safe to drive. And then have to pay for another alignment which I just had done as well. There should be some type of warranty on a recall repair.

- Berkeley Heights, NJ, USA

problem #2

Oct 032016

CX-9

  • 75,000 miles
After recently receiving our vehicle back from a Mazda dealer for warranty repairs on the ptu and control arms, we were driving down the highway at 65 mph - initially going up a hill in the mountains. The car would not shift gears (an automatic) and then would not accelerate past 30 mph. No dummy lights lit whatsoever. We got to the top of the hill and having no place to pull off on the highway mountain shoulder, stayed in the lane of traffic with our hazards on. The down side of the hill was a 6% grade with a cliff on the other side of the guard rails. All of a sudden - the power steering went out and the car was hard to steer. There was still no place to pull over on the mountain highway, so we coasted. We then noticed the RPM's were at 0 and all the dummy lights that are on when the car ignition is in accessory were lit up. The car had turned off - while we were going 65 mph on a 6% grade. No warning - no sounds, smoke, dummy lights - just off. Very amazingly dangerous. We were very lucky to not die a fiery death. My husband was able to keep calm and thankfully the brakes worked - we were able to stop towards the bottom of the hill. We had the car towed as it wouldn't start/stay running. The diagnosis by the dealer (not the dealer who did the prior warranty work) was a failed engine rod. Would have been nice to get a check engine light before having the car completely shut off. We drove the vehicle for less than 100 miles after receiving back from the warranty work and now this.

- Boulder, CO, USA

problem #1

Jan 022014

CX-9 6-cyl

  • 41,000 miles
The car has been turning off while driving with no prior indications or warnings. Engine turns off and steering wheel freezes and locks up. This has occurred multiple time and we have taken the car to the dealer a number of times who has inspected it and even kept it at the shop drove it for a number of days and could not pinpoint the problem. We have made Mazda usa aware of the issue and the potential threat of this vehicle (they gave us a case # 149456450) however, sadly their attitude is that if the problem cant be pinned then it does not exist. This is a clear ignorance on Mazda usa's part and putting the public in a risk with this vehicle.

- Great Neck , NY, USA

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