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thats really cute haha. i remember being impressed by it and lane keeping assist on an rx350 while Lexus was doing my airbag recall. I actually have a dash cam hardwired in that beeps at me when I get too close to someone or the side of my lane. The one option I would really appreciate is a blind spot monitor because the rear visibility of the ISC is pretty terrible.
Is this a feasible aftermarket addition? I was pretty surprised to discover that it was an option on the 2IS, would be cool to add it to mine.
I have a friend with a 2003 BMW 7 series and he added radar cruise to it. There was a wealth of knowledge online in the BMW community. Not sure what kinda support you'd get from the Lexus community, but i'm sure it can be done if you have the know-how and patience.