It's a known problem with these units. There are two resistors on the board that come unsoldered. If you have access to a soldering iron, you can easily fix it yourself or find a buddy with one. One screw in the eyeglass compartment and then you pull the plastic housing down from the windshield side. It takes a concerning amount of force but as long as you pull evenly from both sides it will pop loose. The clips that hold it in may release and fall into the console so keep your eyes open! Then slide it towards the windshield and pull it down. Unplug both connectors and take the unit down. On the underside, there are three #10 torx screws to remove and the module is free. Turn it over, carefully remove the plastic lens and look at the two black rectangles in the lower right corner of the board. Sometimes the fault is obvious and sometimes it is not. Those are 51 ohm surface mount resistors. You just need to resolder them to the board and that should fix your problem and save you $900!
Joe, sorry to hear your compass and ambient temp display isn't working.
Unfortunately, this is a common issue with the '05 to '09 Tacomas. It
is possible to temporarily fix it yourself (search google for forums),
however the repair doesn't last long due to previous oxidation of the
components.
My company repairs these in a manner that precludes the problem from
happening again (we use new components, and a heatsink to prevent
debonding). Repair includes a one year warranty on our work!
http://www.toyotatacomacompassrepair.com
Check out our website, and feel free to contact me with questions.
Thanks! -silicongeek
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