From what I've learned on this forum, the 04 Runner Nav unit is a 2 piece unit. You have the part that mounts in the dash, and the 'brain'. I guess the brain is where you put the map DVD.
So I think that is what the dealer meant when he said you would have to install the brain.
I haven't seen the 04 4Runner pieces, does anyone have a picture of what needs to be installed? I don't think it would be too hard, just have to route the wires, that go to the brain.
I have a 04 Limited, and was thinking about installing the Camry unit, until I found out it doesn't support our 10 speaker system. So I'm stuck trying to find an actual 4Runner unit.
Wonder if in 05, they will make it a 1 piece unit? Get rid of the tape deck, no one uses them anymore anyways.
That sure would make things easier..