I don't really understand why you guys think Mazda has started using revised/redesigned cylinder heads in production..?Thanks for the update. If you can review the invoice and find the part number of the replacement cylinder head, someone here might be able to verify if the head is the revised one.
The latest TSB clearly indicates that it is applicable for even the 2022 model (I am attaching the screenshot).
My 2022 model CX5 was built 12/21 (the sticker on the engine shows 12/21 as well), but technically it is a 2022 model.
In my understanding, based on the latest TSB even the 2022 CX-5 model has the old defective cylinder head.
Correct me if I am wrong.