2007 JBL Headunit

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I need to replace my 2004 JBL 1 disk radio with 2007 JBL headunit. I have JBL Synthesis with 10 speakers, will 2007 unit work with my amp an speakers? Also, will it fit in 2004's opening without needing trim pieces? I'm sure no one done this yet, because it is simpler to just go with general aftermarket, but I believe that 2007 JBL is superior product. Here is the hardest question: where can I get one (preferably for good price)?

 

[tkr128]

While not changed to a 2007 unit, this thread gives the general idea: http://www.toyota-4runner.org/showthread.php?s=&threadid=9821

The wiring is not a problem, but you will need to change the dash trim.

I've seen quite a few on eBay, sometimes you can get a really good deal on them since the 4Runner is pretty much the only Toyota that will accommodate the different dimensions of the unit.