I had the same thing in my 2018 Mazda6. Another user @FrozenApple had the same issue in his CX5.
They were. Also, my dealership had the same thing happen on another CX9 as well. This seems to be an issue creeping up.We’re both the 2.5T’s?
45K milesWhat was the mileage on your engines?
45K miles
Something you just noticed one day or was it always there and got worse over time?
Would be interesting to see the build dates for everyone who has had this issue.
45K miles
I'm sure Mazda already knows exactly how many engines they've replaced under warranty. The fact that Mazda's tech line recommended a compression test when presented with the symptoms is not a good sign. Still, there's about 5-10 posts on here, which isn't a huge number (yet?).
I'm sure Mazda already knows exactly how many engines they've replaced under warranty. The fact that Mazda's tech line recommended a compression test when presented with the symptoms is not a good sign. Still, there's about 5-10 posts on here, which isn't a huge number (yet?).
It appears that the part number for the short block changed, but I have no idea what is different between the two versions.
They probably are aware of it by now, but they can't admit it otherwise users would outcry for a recall which would be too expensive, so they're doing the usual replace as it arises routine, which is fine. What is concerning is, even though it's just 5-10 posts on here, how many owners out there that aren't on the forum are having the same problem, I'm thinking it's widespread enough for Mazda to be on their toes. I vaguely recall that some of the owners who posted here that had the cracked block mentioned that they pushed the engine hard/drove spiritedly(but it still shouldn't be a problem), so perhaps it may be more isolated to driving habits, who knows... the engine is only 3.5 - 4 years old, and not many posters here have reached the 100k mile mark yet.
Do you have a reference to the new part number for the block?
I just went on an online parts catalog and looked up the short block for a CX-9. There's a current part number, and it lists a "superceded" number. Again, I have no idea what changed.
Current part number for the block is PY8W-10-300A.
Old part number is PY8W-10-300.