Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety.


hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
87,229 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-9 engine problems

engine problem

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 2009 Mazda CX-9:

Unsubscribe any time. We don't sell/share your email.

2009 Mazda CX-9 Owner Comments

problem #3

Apr 232016


  • 137,000 miles


SUV would go off in the middle of the road or highway when traveling a high speed. Took it to dealer, they say that they found oil & water mix in the engine due to water pump failure, multiple symptoms would occur as due to this condition. This issue is very series, first you get no indiction of the problem, not sure why the water pump failure causes water to enter the motor and mix with oil, it must be a Mazda design problem, which they seem to know about and never issued a recall to get all the car fixed. If you are driving with your family at 50 mpe in an highway the car will just go off and you can get impacted at the rear with very horrible consequences. Will Mazda issue a recall for such a series issue?

- Boca Raton, FL, USA

problem #2

May 092014

CX-9 4-cyl

  • 51,000 miles
I purchased a used 2009 Mazda cx-7 in June 2012. In May 2014 my check engine light came on. I took the car to the nearest auto service station which was not a Mazda dealership and the engine stopped when they tried to turn it on. I had the car towed to a Mazda dealership and had a quote of $8,000 because I was told I needed a new engine. I purchased a 5 year/100,000miles warranty with american guardian in 2012 when I purchased the car. I filed a claim with american guardian and was told that the engine fail from lack of oil. I presented all my oil change receipts which I had changed every 3 or 4 months over the last 2 years. The auto service company also sent out their insurance inspector to inspect the car to see what caused the engine to fail and if they would be liable. Their report stated that the timing chain jumped which cause the "cam shaft retard" code. The mechanic did show this code to me on their computer before the car was towed to Mazda. I reached out to Mazda usa and they concluded that they agreed with american guardian and cannot help me. Now I'm left with an $8,000 bill that no one wants to cover.

- Brooklyn, NY, USA

problem #1

May 142014

CX-9 6-cyl

  • 73,687 miles
I was in the parking lot looking for a space when the engine suddenly shut off! radio was still on. I had absolutely no control on the vehicle except for "gliding" to the parking spot ahead of me and braking. Once parked I turned the ignition key on off, took it out, re-inserted the key and restarted the car. The car responded normally. As a test, I backed out of the stall and parked in another one without any problem. 2 hours later the car started without any problem.

- Birmingham, AL, USA

Not what you are looking for?