how to unlock Lexus navigation IS 250(2007)

Unlock it? l do not know what u mean. Are u saying that u want to be able to program it when you're driving? If so, start off by having the navigation system show the map. Then push menu, volume, & then touch the top left corner of the screen (there is not a button for anything there), then the bottom left corner of the screen, then the top left corner again, then the bottom left corner again, then on the menu that comes up, push & hold the button that says ''Over Ride'' (the third button down on the left column) for three seconds. After it beeps, push ''back'' in the top right corner & then push the button ''Map''. Here is a video that shows u how. http://youtube.com/watch?v=QLFDvaeT7NA

There is nothing to unlock. If you do not know how to operate navigation system, visit the dealer and ask the salesman to give you demonstration. They should have done (educate you) when you took the delivery. If they didn't, ding them in the survey.

what he trying to say is that he wants to punch in the destination when the car is moving, with the older generation nav you can unlock it, but the 5th gen nav is different, there is a way to unlock it but is risky you have to cut wires.

the bypass in not available on the new models{ to use while the car is in motion} visit lexusownersclub.com they are plenty of forum advice on trying to bypass these things.

turn the key :)