DJH_PENG

Am in Canada. Have a GS450h which started to have Navigation system problems intermittently approx. 16 months ago. Mileage approx. 110,000 km. Now has stopped working completely and message is "external system is not connected" Dealer wants $7,000.00 plus labour. Lexus Canada may or may not help with this. All of the buttons on the right side of the console display the same message when pressed. Left buttons work fine. Anyone else have this specific problem.