After many trips to the dealer about the vibration with no resolution in sight I decided to get rid of my TLX. I can honestly say that it was the best decision I have made in awhile. I got into a CPO Audi S3 and am in love. I was always a loyal Honda/Acura fan as well as my family. We have been so turned off by this whole situation and Acura saying it's "Normal" for a 40K luxury sedan to vibrate .We will no longer be purchasing any Honda automobiles going forward. If you can afford to get out of your Acura I would highly recommend it. Good luck to everyone!