Cracked Cylinder Head (2018 CX-9)

The issue seems to happen to any 2.5 Skyactive based on what I've seen. Why only 'certain' engines? My 2020 vin is not there and there are even 2023 models with the 'crack'. Is Mazda trying get the monkey off their back by only addressing some vehicles and not all? What does the 'Y' in the vin identify?
 
DustyB said:
I see nothing about Canada. Is this a NA warranty?
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TSB are country specific, but are often the same in Canada. The issue is the manufacturers notice are not easily accessible in Canada (to me anyway). So it is still to be confirmed if this applies to Canada or not. As a Canadian, I hope it does. If anybody knows it would be great to know.
 
walt said:
The issue seems to happen to any 2.5 Skyactive based on what I've seen. Why only 'certain' engines? My 2020 vin is not there and there are even 2023 models with the 'crack'. Is Mazda trying get the monkey off their back by only addressing some vehicles and not all? What does the 'Y' in the vin identify?
Click to expand...

I have seen two types of cracked head. The turbo and the NA does not seem to crack in the same location and result in different failure i think. I seem to recall that the 2.5 NA crack results in oil leaks, whereas the turbo only results in coolant leaks. I have not followed the NA since I am focused on the CX-9.

As far as the eligible model years for the warranty, I think there are two factors here. Mazda redesigned the turbo head to try to prevent the cracks, they likely believe the issue is fixed after 2020 (for the turbo models, which is what that extended warranty is for) . The second is that most vehicle after 2020 are still under the 5 year powertrain warranty. Mazda tends to wait to see if there are many out of warranty claim before adding model years to extended warranty programs. Not great but this is what they did for the infotainment screen cracks.

I am just an educated customer like you, but these are my guess.
 
youri said:
I have seen two types of cracked head. The turbo and the NA does not seem to crack in the same location and result in different failure i think. I seem to recall that the 2.5 NA crack results in oil leaks, whereas the turbo only results in coolant leaks. I have not followed the NA since I am focused on the CX-9.

As far as the eligible model years for the warranty, I think there are two factors here. Mazda redesigned the turbo head to try to prevent the cracks, they likely believe the issue is fixed after 2020 (for the turbo models, which is what that extended warranty is for) . The second is that most vehicle after 2020 are still under the 5 year powertrain warranty. Mazda tends to wait to see if there are many out of warranty claim before adding model years to extended warranty programs. Not great but this is what they did for the infotainment screen cracks.

I am just an educated customer like you, but these are my guess.
Click to expand...
Do you know what the Y denotes in the vin number. Must be turbo.
 
youri said:
TSB are country specific, but are often the same in Canada. The issue is the manufacturers notice are not easily accessible in Canada (to me anyway). So it is still to be confirmed if this applies to Canada or not. As a Canadian, I hope it does. If anybody knows it would be great to know.
Click to expand...
Me too. I'm going to look into it here in Edmonton
 
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