My navigation unit in the trunk is acting up so i'm going to buy a replacement off ebay. I have a 05 TL, are all the model years 04-08 interchangeable? Meaning if i buy a 07 Navigation unit will it work in the 05?

 

I'm not sure, but think the wiring is different as between the '04-'06 and '07-'08 Navis because the later Navis had instant traffic service based on road sensors and a rear-view camera viewed through the Navi.

I think the thread on the model year differences in the 3G Service Dept/Garage stickied on the main 3G TL page still works.