I am a new member to the forum and I'm doing my best not to ask the stupid questions. I just upgraded my 1992 ES300 to a 2004 ES330. I too, do not have NAV in the ES330 and am looking to see if I can upgrade. I spent the good part of last night googling for my answer and I think I have about half the information I was hoping for. Unfortunately, in my research, I've come across conflicting information.
Can I replace the current OEM radio/tape deck/disk changer with an OEM NAV unit, assuming I can get a hold of one? Based upon other posts, it looks like the upgrade is possible, but I was given information from an ex-Lexus salesman who said the dashboards are completely different for the ES330s with NAV than without - this doesn't seem reasonable to me though. Will the OEM NAV fit the same opening as the OEM unit that is currently in the dash? Are there any other pieces of computer oriented hardware or other mounting harnesses that will be required to have it installed, wired and functioning? Another question - if I want to interface XM radio (preferably not a stand alone unit like the roadie), is this possible? Lastly, assuming I can do this, does anyone have a recommendation of the best place to buy the NAV unit? Thanks - I hope these questions aren't too redundant for the forum.
