I had understood from earlier post here, that the Mazda dealer will update car's navigation maps for free until the 3-year bumper-to-bumper warranty expired. Twice, (again today), I asked my dealer if he could do that. Both times he said they do NOT do that, the car's owner does it himself from the Mazda web site. So I'm stonewalled, at the dealer and our BtoB warranty expires this June 25th. I've never updated anything in our car's software. So in the next couple days I'll try to do that. Obviously I'll have to unplug our car's SD card, bring it inside and do it on this desktop computer. I think the info is in the owner's glovebox manual. Interestingly, when we bought the car new, the folks at the dealer implied that we ought to leave that sd card strictly alone. That tends to make a guy pretty nervous. So my question for this forum is: any danger to this process I need to watch for? Tips.