NHTSA — Unknown Or Other Problems

CarComplaints.com Seal Of This Might Hurt

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.

4.1

definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
29,060 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 miscellaneous problems

miscellaneous problem

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2011 Mazda CX-9 Owner Comments

problem #5

Sep 102019

CX-9

  • 103,000 miles

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

The A/C evaporator tank condensation drain clogs. Ours has clogged twice and the first time the water in the tank would slosh around and hear it when making a left turn. Eventually it ruined the blower motor to the A/C, which had to be replaced. Now 19 months later, we heard the water again and took it in right away and it was clogged again and the blower motor has to be replaced again. This is a design defect. There should be a better drain system. Clearly this is an issue with the Mazda Cx-9 model in several years because there are videos of how to unclog the A/C drain.

- Raleigh, NC, USA

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problem #4

Oct 292017

CX-9

  • miles
Takata inflators recall? no incident to report

- Belleville, IL, USA

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problem #3

May 122017

CX-9

  • miles
Breakbooster when we asked our mechanic to check it and end up after calling Mazda fremont that it is covered by the extended warranty for this. While drivig I thought I loss my break and was not fully working. Was scared. Mazda fremont assisted us and provided us a temporary car to use.

- Hayward, CA, USA

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problem #2

Aug 092016

CX-9

  • miles
Front lower control arms safety recall 8515G / NHTSA campaign no. 15V-451 :: July 19 2016 went to team Mazda Subaru (6218 cleveland blvd. Nampa id) for recall replacements and was told it would take 2 weeks for parts to be ordered & delivered. August 8th, I called team Mazda after not receiving any call/ notification and was told I would receive a call back. Still no call back (August 9th; three weeks later).

- Caldwell, ID, USA

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problem #1

Aug 242015

CX-9

  • 42,300 miles
When pressing the brakes at any speed there was a hissing sound and the brakes were hard to press. Regardless of the amount of pressure I applied to the brakes they did not react and it took the vehicle longer to slow down even at very low speeds (5-10 mph) or faster. This came on suddenly and caused me to bring the vehicle into the service department of the the dealership where I purchased it. The Mazda technician inspected the vehicles and completed a diagnostics of the vehicle and discovered that the master cylinder and brake booster have failed and need to be replaced.

- New Orleans, LA, USA

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