I have tinted windows in the 2007 Camry. The windows were tinted by the dealer at the time of purchase.
About a month ago this ocurred after the NAV worked fine for 11 months. see below:
----------------------------------------------------------------------------------------------------- NAVIGATION SYSTEM SHOWS VEHICLE IN WRONG LOCATION 11/14/2006 - 2006 - 2007 model year 4Runner and Sienna vehicles equipped with the Toyota Navigation System produced BEFORE the Production Change Effective VINs shown in this TSB. 2007 model year Camry, Camry HV, and Solara vehicles equipped with the Toyota Navigation System produced BEFORE the Production Change Effective VINs shown in this TSB.Some customers may experience a condition with their navigation system, where the vehicle icon is intermittently shown on the map in the wrong location. A special DVD map disc with a revised operating system has been developed to remedy this condition.
NOTE: If the customer has purchased a Gen 5 update disc after November 1, 2006, then this TSB is NOT applicable.
---------------------------------------------------------------------------------------------------- I brought the car in for warranty service due to the NAV system not working properly. They installed the revised DVD map disc on 3/7/07 and the NAV is now funtioning properly. But this is too short of a time to conclude that the NAV will continue to function as it is supposed to, since the initial DVD map disc failed after 11 months. Time will tell if the new DVD disc is a permanent solution.
It is stated in the 2007 Camry owner's manual that certain window tinting can interfere with the NAV system.
I've read on this newsgroup that the NAV antenna is in the dashboard but I can't confirm that.
Hope this helps.