CarComplaints.com Notes: The only area of real concern for 2011 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.

6.4

fairly significant
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
11,265 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.

2011 Mazda CX-9 accessories - interior problems

accessories - interior problem

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2011 Mazda CX-9 Owner Comments

problem #1

Apr 062012

CX-9 6-cyl

  • 11,265 miles

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

My son age 13, weighs 105 pounds. When he sits in the front passenger seat the air bag warning light is illuminated indicating that the air bag has been disabled. It is my understanding that the recommended minimum age and weight for the front seat is 12 years and 80lbs respectively. The Mazda dealer, (john kennedy Ford, 1403 ridge pike, conshohocken, pa 19428) ran a check of the calibration of airbag sensors." All ok, no update needed" - they gave me a copy of service bulletin no 08-001/13. This mentions that the issue is caused by my son sitting incorrectly in the passenger seat. I have spoken to the dealer on multiple occasions and this issue is still not resolved.

- Wayne, PA, USA

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