NHTSA — Fuel/Propulsion 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.

4.5

definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
24,333 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 fuel system problems

fuel system problem

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2012 Mazda CX-9 Owner Comments

problem #3

Oct 032017

CX-9

  • 40,000 miles

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

Multiple trips to the dealership and an independent mechanic and the check engine light (cel) comes on with a diagnosis of evaporating system / loose gas cap. Multiple diagnostics fees, a gas tank pressure test and 3 gas caps later and the problem has not been fixed. I noticed a few online forums with several others complaining of the same issue across a wide rage of years and Mazda models. There is a design problem with mazada evaporating, fuel and emissions systems. The dealer cannot identify the problem. Beyond replacing the gas cap and collecting a diagnostic fee.

- Franklin Square, NY, USA

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problem #2

Mar 012016

CX-9

  • 33,000 miles
The contact owns a 2012 Mazda Cx-9. while driving 20 mph, there was a loud metal to metal noise coming from the rear of the vehicle. In addition, the gears failed to shift correctly and the oil and engine indicators illuminated. The dealer diagnosed that the brakes needed to be changed. The brakes were replaced, but the failure recurred and worsened. The contact also smelled fuel coming from the vehicle and the vehicle had trouble accelerating. The manufacturer was notified. The failure mileage was 33,000.

- Stow, OH, USA

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problem #1

Jan 022015

CX-9

  • miles
When pumping gas in the fuel tank, the gas spews out when the pump stops. This causes the gas to spill down the side of the car.

- Ellenwood, GA, USA

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