My New to me 2011 LS460 has adaptive Cruise Control and Park Assust, but, unfortunately, it does not have LKA.

My question is, if I begin to
change lanes, and there is a car in my
blind spot, will my car warn me?

 

No. BSM is available on selected cars from 2013 onward.

 

Drat! This is unfortunate.

 

You may have BSM, blind spot monitor. On US cars, the on button is above the driver's left knee. A light flashes in the exterior mirror, no sound. It's not the same as LKA but helpful non the less.

 

Thank you, I'll check.