I've been writing to Lexus for years, and going to my dealer for years. The built-in $2,465 navigation system in my 2011 ES 350 has been awful. Makes a lot of mistakes, data is out of date. The first database update was very expensive to get me from 2011 to 2012, but nothing is available after 2012; in road years that is a LONG time. The blue tooth in the car has always interfered with the operation of my smart phone (iPhone 4, then iPhone 5S). Horrible situation, the very costly navigation in my Lexus is of very little value and it prevents the free systems in my smart phone from operating. Lexus has done nothing.
Today I finally found a work-around. For $30 I ordered a Noisehush wireless blue tooth receiver that clips to the visor. It does not interfere with Siri, and it allows me to use the 3 free navigation apps on my smart phone. The data on those apps is updated daily for free. So now I have the $2,465 navigation system gathering cobwebs.