The Mazda extended warranty doesn*t give you a extra 7 years. The 7 years is from the date you purchased the car at. So in saying that you would get 4 years extra comprehensive and a extra 2 years power train.
Ask me how I know .
Working in the field for the past 11 years I would never buy extended warranty.
Conversely, I have 10 years and 150K miles of near bumper to bumper coverage. Yes, it cost $2400, but it is also going to "be there for me".