I checked and my subscription ran out in 2019 still have all my maps. They want $80 to download new.
I also use Gamin Active Captain that has all the maps. My guess is they want to get rid of the app from Nav and get people over to Gamin.
Since Garmin owns both why have 2 apps the do the same thing.
I used the Mec parts that shows the completed breakdown of the engine. Then look up parts on youtube and get how to replace.
If your trying to figure out when something breaks and what it is.. Get the computer sensor for your engine worth the money. Connects via bluetooth