Engine is a 10 our of 10 for reliability. Seriously. Don't think I've seen one engine failure here in 2 years.
Tranny is also very reliable but with a caveat. There was a small batch of bad trannys that went out in early 2016. These often failed early and were replaced under warranty. It was not common. I don't think you need to worry about this. We haven't seen this issue here in at least a year.
This is the most popular CX5 board on the internet in the US, at least.
Was there a recall on the bad tranny's? Did it just fail or had other issues?
I found a CX-5 and the build date is 3/2015 and was sold to first owner on 04/18/2015. Therefore, it would still have power train warranty.
Thanks
Waid