Doesn't sound good
This is troubling. Reminds me of the Acura TL transmission issues in 2000 - 2003. I was hoping to avoid dealing with it again. However, that was a bad design issue. This may be something else, but it would be good to know that Mazda can fix the issue, whatever it is.
We've seen several 2016 CX-5's in this community with several thousand miles on it having automatic transmission replacement. Consider the minimum number of CX-5 owners in here among all CX-5 owners in the US, I can smell there're lots more having the same problem. My guess is there was a batch of transmission parts having the quality issues which cause the transmission to fail. This is not a good feeling for us with many transmission replacements at such a early stage for 2016 CX-5's! I can feel your pain and hope you still have confidence with quality and reliability on Mazda's.
This is troubling. Reminds me of the Acura TL transmission issues in 2000 - 2003. I was hoping to avoid dealing with it again. However, that was a bad design issue. This may be something else, but it would be good to know that Mazda can fix the issue, whatever it is.