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kgerry

Updating Gen 4 Nav From Version 5.1 To 9.1

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I am curious if anyone knows what the changes are from V5.1 (i think my 06 came with Gen 4 V5.1) to V9.1? are they simply mapping or are there firmware updates for the system as well.... i find the screen layout fairly archaic compared to the aftermarket units i sell....

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