NHTSA — Vehicle Speed Control 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.

3.1

definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
45,242 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 engine problems

engine problem

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2011 Mazda CX-9 Owner Comments

problem #3

May 132018

CX-9

  • 69,000 miles

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

Car surges unexpectedly even when gas pedal not engaged - can cause a rushed forward or reverse motion, putting pedestrians or other cars at risk. This happens daily. Problem was identified by dealership several months ago. There is a related oil leak.

- Albuquerque, NM, USA

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problem #2

May 162016

CX-9

  • miles
I took my car to hall in brookfield wi to fix a recall issue. The dealer told me they fixed the recall issue but noticed another problem that requires the replacement of the differential bushings because they were torn. They charged me over $500 for this issue and I believe the issue was exasperated by the recall issue and I am not sure why I had to pay. I honestly believe it was a way for the dealer to charge me for the recall work because it was supposed to be free. I am attaching receipts for the work hall did to this complaint. Now my car is having issues with properly accelerating and is very loud.

- Menomonee Falls, WI, USA

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problem #1

Dec 162015

CX-9 6-cyl

  • 66,727 miles
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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