hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
65,475 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.

2007 Mazda CX-9 brakes problems

brakes problem

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2007 Mazda CX-9 Owner Comments

problem #4

Sep 192011


  • 68,000 miles


The contact owns a 2007 Mazda CX9. While driving approximately 60 mph, the contact engaged the brake pedal repeatedly with force however there was a delayed response. The contact swerved off the road to prevent crashing into a proceeding vehicle. The vehicle was taken to an independent mechanic for diagnosis where the technician stated that the failure was contributed to the power brake booster. The contact planned to take the vehicle to an authorized dealer for repair. The manufacturer was not made aware of the problem. The approximate failure mileage was 68,000.

- Chesapeake , VA, USA

problem #3

Aug 102011


  • 74,000 miles
Brake vacuum booster failed, brake fluid leaking into vacuum system.

- Califon, NJ, USA

problem #2

Feb 152011

CX-9 6-cyl

  • 46,000 miles
My daughters 2007 mazdacx-9, right rear wheel bearing has been replaced 3 times in the first 46,000 miles of ownership. The vehicle was purchased new and parts have been replaced at no cost. Have been made aware there is a service bulletin from the factory stating rear bearing problem is due to an improperly installed or misshapen ABS sensor. Bulletin states will only be replaced free during warranty. This problem could have serious ramifications to occupants if not permanently repaired because ABS sensor is involved.

- Britton, MI, USA

problem #1

Mar 032010


  • 73,900 miles
We have had our Mazda Cx-9 since 2007. At 58,000 miles we noticed a "humming" noise. We took the vehicle into the Mazda dealership since it was still under warranty. We got the run around stating it was our tires; however, it turned out the front wheel bearings were bad. They replaced the bearings and one year later we are having to replace the rear bearings. Through research we are finding that Mazda has a service bulletin issued 2/1/2008 about the rear bearings. Basically stating the noise is from an improper shape of the ABS sensor and this is only covered if there is still a warranty on the vehicle. My question is if they know this is a problem then why is this issue not recalled because a frozen bearing is and can be very dangerous. Mazda refuses to help replace our rear bearing since we are now at 74,000 mile and our warranty is out. All we keep getting is a run around by our local dealerships. We also have had problems with our driver side mirror. Mazda replace the mirror a few weeks after we bought of Cx-9 but it still shakes.

- Round Rock, TX, USA

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