Looking for any info on a TSB for 05 EX 4cyl. 27k mi.Steering vibration at highway speed (when staying at steady speed trying to maintain speed. Let off gas or accelerate and it seems to go away until speed maintains agian.)Tires have been rebalanced and did not fix the problem. I found old post that said there is a TSB for this problem for vehicles vin # starting with 1HGCM. Does anybody know anythin about this?

Another problem I'm having is heavy steering wheel vibration when at high idle and when compressor/fan kicks on when AC running. Not sure if problems are related but thought iot might help with diagnosis.

Going back to dealer tomorrow afternoon. i'd like to go with knowlege if possible. Just purchased car certified 2 weeks ago. Did not notice on test drive!!