NHTSA — Electrical System Problems

CarComplaints.com Seal Of This Might Hurt

CarComplaints.com Notes: The only area of real concern for 2012 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 for most CX-9 owners, 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.

3.3

definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
41,180 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.

2012 Mazda CX-9 electrical problems

electrical problem

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2012 Mazda CX-9 Owner Comments

problem #5

Apr 012018

CX-9

  • 85,000 miles

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

We own a 2011 Mazda CX7 and a 2012 Mazda CX9, the motors in the drivers and passenger side windows of both cars when out within a 6 month period of time. The warrant on the cars were out at 36K miles and in 2014. The motors both stopped working past this period time but have read this has happened on these same vehicles. The windows go down but start making a loud clicking sound and will not go back up with out holding you hand on it, creating a very dangerous situation with small children.

- St. Louis, MO, USA

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problem #4

May 152013

CX-9

  • miles
The Mazda CX9 that we purchased has a acceleration problem when we go to stop.. Mazda has never been able to solve the problem completely.. we have had 2 brake boosters replaced under warranty. We feel the car is unsafe to drive and Mazda has not addressed the problem. They tell us nothing is wrong with the car. It know also has transmission problems with squeaking and grinding noises coming from the car. This is a design flaw that has not been addressed.

- Desmoines, WA, USA

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problem #3

Jan 312017

CX-9

  • 68,000 miles
The contact owns a 2012 Mazda Cx-9. the contact stated that while driving at low speeds, the vehicle stalled without warning. The failure occurred on six occasions. The vehicle was taken to a dealer but was not diagnosed or repaired. The manufacturer was not notified of failure. The failure mileage was approximately 68,000.

- Misswa, MN, USA

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problem #2

Sep 092015

CX-9

  • 52,000 miles
Brakes prematurely failed after feeling numb and squishy. Upon diagnostic by a local mechanic, it was determined that the brake master cylinder had a leak. In addition, the ABS, traction control and emergency brake lights came on when the symptoms were present. Estimated cost of repair $1250.

- New York, NY, USA

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problem #1

May 012013

CX-9

  • 900 miles
This navigation system does not speak the street names making me look at the screen for the name of the street. Very dangerous. No help from Mazda. The system needs an upgrade.

- Erie, PA, USA

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