i have a 2005 gs430 with oem nav. and if i were to replace it what size would i buy?
and if i dont want to change it, and you guys know how when you have the oem nav, they tell you the direction on the driver side speaker. is there a way to rewire that to the center dash speakers?

 

Well if you mean you want an aftermarket double din dvd player you will need to swap your existing nav system with a non-navi system. The one with climate controls at the top and the radio at the bottom then replace that radio with any 6.5-7inch screen dvd players from Pioneer, Alpine, Elcipse etc. It is a bit of a hassle and i think its a waste when you resell the car.... people will rather buy a car with oem navi for example.

also do a search as there have been many topics on this.