Only if you want a map card at the bow and console at the same time. If you have the card,That you plug in ,you can move it to the front unit, when needed.
If you have NVB there is no way to move it to the front and Interlink won't share it! So then if you want a map up front you would need the map sd card or buy the NVB model. Thats the one with all the maps built in. They are 2006 maps!