![]() 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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