Which Generation Nav system do I have, 05 Avalon LTD

[rustman]

I'm wanting to buy and install an USA SPEC ipod interface in my 05 LTD with Nav, but I didn't know which generation of Nav system I had. I guess it makes a difference between getting the PA15TOY or PA20TOY.

Also, does anyone have a good write-up for removing whats needed (if anything) for installing something like this. I figure the dash and console will need to be taken apart some to get to the factory radio and running the cable down the console?

[inov8]

See this message thread for reference:

2006 Avalon - Navigation update question

It appears the '05 Avalon NAV is considered Generation 3.