I got one of them Aiwa MP3 head units. It's great. The Aiwa six disc CD changer DOES NOT play mp3's. It will play CD-R's and CD-RW's, I believe. Here's a post of mine back in October if you need more info.

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The instructions from Crutchfield are very straightforward and easy to follow for a first timer. The radio in the Xterra is very easy to take out. No mounting kit is necessary, you can use the existing brackets to mount the head unit and pocket underneath. You might have to use the Aiwa screws to mount the head unit to the brackets (that's what I did), but you can use the existing screws to mount the pocket. If you plan on "trying" out the radio, it might be best to use wire caps insted of soldering the connections. Later on if you are certain that it's the head unit for you, you can solder the connections. Everything is color coded and Crutchfield will give you the proper wiring diagram.

Here are some additional instructions with pictures:
http://www.installdr.com/InstallDocs/Nissan/Xterra.html

The unit being installed is a Blaupunkt (I think). However, the install should be similar with most aftermarket radios.

Here are some scans of the head unit. First is the dashboard view.

[img]http://albums.photopoint.com/j/View?u=1306177&a=10374674&p=35052996&Sequence=0&res=high[/img]

Second, the radio w/ pocket.

[img]http://albums.photopoint.com/j/View?u=1306177&a=10374674&p=35052994&Sequence=0&res=high[/img]

Finally, the open faceplate.

[img]http://albums.photopoint.com/j/View?u=1306177&a=10374674&p=35052991&Sequence=0&res=high[/img]


So there you have it. Happy installing.

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2000 SE 4x4 5sp Alpine Green