If you are looking for that subdivision that was just built a few months ago, it may not be on the map you updated. So, even though a map may be from the current year, the data on it is probably a year or so old. But, you should be warned – there isn’t a map company in the world that re-maps the entire USA every year. This is a great idea, because the newer the maps the better the data on them.

Reason #2) You have a fairly old vehicle (like a 2006) and would like to update the maps to something a little more recent. This leaves you with a $2,000 DVD GPS unit that is totally useless. Instead, he probably put it up on Craigs List or tried to return it to the dealership. Most likely what happened was that the previous owner paid $250 to update his map data, and when he parted with the vehicle he didn’t want to pass on that $250 DVD to you. Where does the disc go? It could go anywhere. If this is the case, then your GPS system will not work because it will not have any GPS Map data. Reason #1) You just purchased a used car, and it is missing the DVD disc. Why would you need a replacement GPS navigation disc? There are really two reasons: No – it’s just a DVD disc that has to always be inserted inside the GPS system. Or, maybe it was downloaded from the satellite! That isn’t the case.

I was surprised about this when I first learned about it, too! I always assumed that the map information is stored on a hard drive or memory chip somewhere inside the unit. All GPS and map information is stored on an old-fashioned DVD disc. The in-dash factory installed GPS Navigation systems don’t actually store any information.

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