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Originally Posted by Stevo
Do the Accord, Odessey, Pilot, and Ridgeline have an actual higher end Navi unit than the CRV and Civic? ...or is the only difference the DVD software?
Would the ver 4.55 Accord DVD work in a Civic? (this software has a live traffic overlay) 
The reason I asked is that I have NavTraffic and Weather on my XM subscription, but it appears to be useless on the Civic's Navi system. Is there any upgrade that can fix this problem? ..or would I have to shell out the money for an upgraded Alpine navi system?
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The head units are definitely different. I doubt a simple software upgrade would do any good. The hardware wouldn't be compatible. If you desperately need live traffic and weather updates, you'll have to look into upgrading your head unit. If you're going to do that, you might as well save some money and go aftermarket.