the unit you're looking at is a complete stand alone head unit, the only thing you'll need from the cars original wiring is power and speaker connections.
you wont use the cars original gps antenae or sat nav system at all, the unit comes with its own which i suspect would have to be the one used.
so long as you've got double din size hole to fit it in?, that unit will fit and work, if used with all it own gubbins, but as mentioned above, they are often not a perfect fit, and this is because they are originally built for the japanese domestic and american market which have a slightly different style of bolting into a dash chassis rather than sliding into a captive cage like us europeans. This often leaves it slightly proud, and does not come with a finishing surround that will adequately cloak it, so you can sometime be left with an unsightly gap, but sometimes you can modify something or improve what it comes with to make good enough.
how well it works is an unknown i suspect, although ive had similar multi media devices in many of the jap imports ive done in the past, and although not Alpine quality, they do what it says on the tin quite respectably usually.
Last edited by PETR0LHEAD; 30-07-10 at 22:38.