I'm having a hard time finding a white low mileage is350 for my mother with navigation

I have found a few without. How much does it cost and how hard is it to install the factory navigation after the fact?

And if anyone knows of a white is350 for sale in good shape below 75k miles let me know please!

 

Since the non-NAV 2IS models don't have the same connections, you'd be needing to purchase a custom harness to get the OEM NAV to work in it :

http://www.ebay.com/itm/LEXUS-IS250-IS350-IS-F-GPS-NAVIGATION-CUSTOM-MADE-WRING-HARNESS-/251052866099?pt=GPS_Devices&hash=item3a73eaba33&vxp=mtr
But the hardest part in removing the whole unit is removing the center vent piece. Everything else is cake!

https://www.clublexus.com/forums/is-...n-fix-diy.html

 

That's an expensive wiring harness + navigation

Or

Buy aftermarket for less than 1K!