The nav in my 2014 Mazda 3 consists of a SDHC card plugged into the console. I pulled it out once, plugged it into my Macbook & updated it, no charge. I should try it again, but I'm not sure if further updates are free. I have 2 Garmins that get free updates & Garmin notifies me when they are available.
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2018 Solid Red, 6MT, Touring Sport Coupe
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