NHTSA — Engine And Engine Cooling: Engine Problems

CarComplaints.com Seal Of This Might Hurt

CarComplaints.com Notes: The only area of real concern for 2010 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.

9.3

really awful
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
1,500 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.

2010 Mazda CX-9 engine problems

engine problem

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2010 Mazda CX-9 Owner Comments

problem #1

Aug 272010

CX-9

  • 1,500 miles

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

The contact owns a 2010 Mazda Cx-9. the contact stated that there was a loud ticking noise in the engine. Once the engine was cold the noise became extremely loud but when it was warm the noise ceased. The vehicle was taken to the dealer twice. The first time they stated that they corrected the problem by down loading information from the computer in reference to the PCM and told her that it was corrected. When she drove the vehicle it continued to make noise. She then returned the vehicle back to the dealer and they were diagnosing the failure for an entire week. The dealer informed her that it was the characteristics of the vehicle and it was inspected by Mazda engineers. The engineers told her that it was a normal sound compared to other vehicles and that her vehicle was just louder than the others. She did not call the manufacturer because the dealership told her that they would contact them. The vehicle was not repaired. The failure mileage was 1,500.

- Vineland, NJ, USA

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