I bought a CX-5 from 2013 in Norway this spring and have been very happy with it. 2 weeks ago we got diverse warnings including low oil pressure and had the car towed. The workshop, after few days, said that there were issues with the cam shaft material and that the repairs would cost about 8000 GBP, remember this is Norway (the land of electrical cars), but that Mazda had agreed to take the cost. The repair, full flushing of the motor, new Cam shaft, new turbo, new valves, etc. will take another week or so to complete.
What surprises me most on this issue is that dealers happily sell cars with a known problem without any sort of warning, at least they have taken responsibility to fix it.