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.

2.1

hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
74,500 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 wheels / hubs problems

wheels / hubs problem

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2010 Mazda CX-9 Owner Comments

problem #4

May 272021

CX-9

  • miles

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

Driving on I-5, near Gold Hill, Oregon, when the traction control system light came on and the Vehicle slowed down. I had to push the gas pedal to the floor to get the car to move and I could not shift gears! It shuddered and the wheels seemed to lock up. I could smell burning rubber. I forced the car to the next exit, pulled off and shut it down. I sat there waiting for it to cool off. When I started it again it was a little rough at first but then seemed to get better and I was able to get home. I bought the car in June of 2020 from Lithia Motors in Medford, Oregon. I also bought a Power Train Warranty For $2,500 which was set to expire on 6/10/2021. I called Lithia and made an appointment to take it to them for repairs on June 1, 2021. I got as far as Grants Pass, OR, and it did the same thing I described above. I called a tow truck and had it towed to Lithia in Medford. When I got to Medford, the Service Manager told me I would have to take it to Crater Lake Ford. When I got to Crater Lake Ford I was told to take it to Crater Lake Mazda which I did. I described in detail what the car was doing to.the Service.Manager and told him I feared it was some kind of transmission problem. I also told him I had a power Train. Warranty the would expire on June10thso time was no the essence! I never suspected the brakes because we had the bakes repaired in November of 2020 at Lithia Motors. They were making a hissing sound. They replaced the.brake booster among other brake parts for $1,300 plus. That job was still under warranty. I got a call on June 15th telling me the problem was in the gear shift. He said it was now repaired and I could come and pick it up. I paid $674 for that repair. I got three miles from the dealership and the original problem occurred. I had it towed back to Mazda and it has been there ever since!! They replaced they're (traction control module), but that didn't fix it. After test driving it the original problem occurred! It's still at Mazda.

- Selma, OR, USA

problem #3

Feb 112020

CX-9

  • 135,000 miles
The contact owns a 2010 Mazda CX9. The contact stated while driving at 5 mph around a roundabout, the passenger's side front tire detached independently without warning. The vehicle was towed to modern Mazda,68 waterbury rd, lj ct 06787 but was not diagnosed. The diagnosis and repair was still pending. The manufacturer was notified of the failure and a case was opened. The approximate failure mileage was 135,000.

- Bantam, CT, USA

problem #2

Oct 162019

CX-9

  • 125,000 miles
There are noises coming from the front tires, when driving. No one could pinpoint the problem. Brake booster went out a couple months later.

- Rock Hill, SC, USA

problem #1

Oct 012015

CX-9

  • 38,000 miles
While driving on highway TPMS signal sounded. Exited immediately rear right tire flat.upon examination valve had fallen into tire. Changed tire went to service tire dealer stated all valves corroded badly. Replaced all valves at costco they were unable to service too much corrosion. CX9 owners should be warned of problem and possible catastrophic failure.

- Staten Island, NY, USA

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