Bravo, but:

> When I bought the car, the previous owner asked me whether I wanted a "navigation map SD card" with it.

Why would they even ask?

> Since the maps on the SD card were apparently very out of date and didn't function properly, I decided I didn't need it and the previous owner tossed it.

WTF? My 2016 Mazda has an out-of-date SD card too. I removed it because it slightly speeds up how fast the system boots without it, but it's in the glove box for any future owner when I sell the car. I just can't understand tossing it. It's not like it takes up any room.

(My Mazda also sets its time via GPS, but I can get to the timezone offset and DST checkbox regardless of the presence of the SD card.)