NHTSA — Service Brakes, Hydraulic: Power Assist: Vacuum 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.

2.3

hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
66,727 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 brakes problems

brakes problem

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2011 Mazda CX-9 Owner Comments

problem #1

Dec 162015

CX-9 6-cyl

  • 66,727 miles

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

The contact owns a 2011 Mazda Cx-9. the contact stated that while stopped at a stop light, the accelerator pedal was depressed but the vehicle failed to accelerate as the warning indicators flashed and the engine stalled without warning. The vehicle was taken to a dealer where it was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 66,727. Updated 06/15/16 the consumer stated she accelerated from a stop light, as she turned the corner. She then realized, she could not brake, or steer the vehicle. She hit the emergency brake and turned the vehicle off. The dealer believed it was a vacuum problem as she braked slightly when she turned the corned. Updated 06/16/16.

- Walnut Creek, CA, USA

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