NHTSA — Fuel/Propulsion System Problems

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CarComplaints.com Notes: The 2009 Mazda CX-7 appears to share the same engine & A/C defects as the two previous model years: VVT/timing chain failure, turbo failure, & the A/C compressor clutch seizing. The timing chain failure is especially bad with many cars requiring an engine replacement ($9,000+).

In 2011, Mazda began a "Special Service Program" that extended the warranty to 7 years/70,000 miles covering turbocharger oil leaks & excessive timing chain noise — an early sign of timing chain failure. However coverage under the program requires perfect documentation of all required maintenance with other stipulations. Buyer beware.

0.4

hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
469,600 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.

2009 Mazda CX-7 fuel system problems

fuel system problem

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2009 Mazda CX-7 Owner Comments

problem #2

Feb 282015

CX-7 4-cyl

  • 100,000 miles

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

While driving down the interstate, vehicle lost much of it's acceleration, and began making a loud whining noise. Pulled off the highway and investigated the noise. It was a loud whining that only occurred in neutral and park over 2500 RPM and with any acceleration while in gear. Also noted yellow foamy oil on the dipstick which was 4.5 quarts low being very close to time to get a change. Towed to the shop to discover that the vehicle is burning oil and the turbo had gone bad. Mechanic suspects that the turbo going bad is what was most likely burning oil and retaining water in the crankcase.

- Weaverville, NC, USA

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problem #1

Jan 152013

CX-7 4-cyl

  • 839,201 miles
Apparently the design of the turbo and the engine creates hot spots in the engine, especially in the turbo. These hot spot create sludge build up which eventually effects the performance and reliability of the engine. Research on the internet shows this to be a problem for a considerable amount of owners of this vehicle. Mazda has refused to correct these problems under their warranty. Also lacking by Mazda, since it is apparently a major cause of large build-ups of sludge, is the necessity to idle the engine for three minutes prior to turning off. This was never explained to us when the vehicle was purchased.

- Newport Beach, CA, USA

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