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.

5.0

definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
20,015 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 accessories - interior problems

accessories - interior problem

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2010 Mazda CX-9 Owner Comments

problem #3

Aug 082012

CX-9

  • 60,000 miles

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

Headrest leans too far forward causing strain on entire body especially on back and neck. Bought after market headrest and replaced it.

- Columbia, MD, USA

problem #2

Jan 122011

CX-9

  • miles
At 8am January 12, 2011 I was driving to work in a blizzard. I felt a slight pain/pinch from my seat and quickly moved thinking it was something from my pocket. I resumed driving and again felt a much greater pain causing me to swerve and cause a near collision. Very frightened, I jumped out of the car (mid traffic in blizzard) to find my seat scorched through apparently from the seat warmer. This is very concerning. Fortunately I was not driving at a greater speed as it could have been critical or fatal. What do I do about the seat? although I have turned the warmer off, I am still afraid to drive this vehicle.

- Somerville, MA, USA

problem #1

Jan 072010

CX-9

  • 45 miles
New vehicle with dead battery on four seperate occasions. Took to dealership, battery replaced. Child complained that seat was hot. Next day dealer notified and car brought in T odealership. A loaner vehicle was received. I was notified heated seats with recall and would be disconnected at this time. This all occured in a two week period in January. March 17 took car back to dealership to hav recall on heated seats fixed. March 25th attempted to use heated seats, did not work. Mar 30th vehicle back to dealership. Heated seats working after they looked at vehicle. March 31st riding to work in passanger seat, heated seat option off, seat warm to touch, became hotter and hoter then warm during 1 hour communte.

- Stafford, VA, USA

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