Yes you need to purchase the Mexico map for your device which retails at $69:95 If there is insufficiant free space on the device you might have to copy the US map to the PC before deleting it from the unit then when you want the US map back on delete the Mexico map and copy the US one back to the device - Mike
Better yet, TomTom actually offers a USA & Mexico map which would work out much better for you. Don't purchase just the Mexico map, or else you won't be able to fit them both. Here's a link to the map
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