Cant recall if there has been any new updates regarding upgrading the stock navigation system in the 03 LX470. But I contracted Grom and this is the link to the system they say will work for those of us with the stock NAV in a 2003.
I am going to purchase soon while they have a 50% off code and post the install process and reviews for those interested. Cheers!
Select Lexus GX470 2003-2004 VLine VL2 Infotainment System Upgrade Video Interface
Select Lexus GX470 2003-2004 VLine VL2 Infotainment System Upgrade Video Interface
gromaudio.com
I am going to purchase soon while they have a 50% off code and post the install process and reviews for those interested. Cheers!