Coolant was leaking into my engine where the oil goes and I was unaware. The vehicle stalled in me while driving because of this. Even after figuring out what the issue was and trying to have it fix it became inoperable.
Engine & cooling
2007 Mazda CX-9 Engine problems
Owners have filed 4 complaints about the 2007 Mazda CX-9's engine & cooling with NHTSA - 5% of all its complaints, most recently on May 22, 2023. Stalling, loss of power, oil consumption, overheating, head gaskets, timing chains and engine failure.
- Complaints
- 4
- Recalls
- 0
- Crashes
- 0
- Fires
- 0
- Injuries
- 0
- Deaths
- 0
Engine complaints
Was driving on interstate at night. Engine light came on and car immediately drove as if it were not operating on all cylinders. Took it to dealership and it had multiple misfire codes, 301, 351, 352, 354. I researched and found multiple complaints filed on-line regarding the exact misfire codes I experienced and pcm issues in this particular year, make and model. This problem is way too expensive to fix on a personal level. If mazda is aware that this has been an issue, they need to remedy it. I do not believe I...
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need to personally pay for a pcm when this appears to be a common problem in this make and model. I believe mazda is very aware of this problem, and they need to remedy it and replace the pcm. *Tr
Was driving on interstate at night in snow; unsafe and unknown area with just me and my daughter. Engine light came on and car immediately drove as if it were not operating on all cylinders. Took it to dealership and it had multiple misfire codes, 301, 351, 352, 354. Coils bad and pcm "fried." Car is only 5 years old and last car payment made october 2012. I researched and found multiple complaints filed on-line regarding the exact misfire codes I experienced and pcm issues in this particular year, make and model....
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This problem is way too expensive to fix on a personal level. If mazda is aware that this has been an issue, they need to remedy it. I'm perfectly fine to pay for replacement parts at the time mazda recommends they are due; however I do not believe I need to personally pay for a pcm after 5 years of use when this appears to be a common problem in this make and model. I called corporate mazda to ask about any known pcm problems on 3/6/2012, reference # 146248920 and was not given any information. I was told to simply trust the technician. This answer is not acceptable. I believe mazda is very aware of this problem, and they need to remedy it. I will pay for new coils and new spark plugs as those are due, but mazda should replace the pcm. *Tr
Engine oscillation when at idle it oscillates more than 400 rpm when the compressor comes on, and sometimes the engine quits because the rpms drop more than 400. *Tr
Mazda CX-9 engine complaints by year
CX-9 engine problems, every yearSource: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked . Complaints are owners' own reports and are not verified. How we use the data