My 2002 I35 has a 6CD changer head unit...this makes it incompatible with every iPod (and satellite) adapter I know of.

I'd like to swap my 2002 radio for a 2000 or 2001 which ARE compatible with iPod adpaters.

Does anyone know if these radios are phyisically and electrically identical? Can I just plug-and-play one radio for the other?