Thanks for your excellent post ToolmanJoe - well presented too. I worked with your pics and instructions on my smart phone as my guide and it was easy. I saw videos of people pulling down their headliner and damaging it ... your approach is much smarter.
I would add a couple of comments perhaps specific to my 2011 EX-L. On the rear mic, reaching the screws with a tool was hopeless and my fingers alone could not decipher the plastic clips to pull them apart. I bent the wire end toward the light opening where my hands were until there was a little snap and the green housing came into view along with the two wires coming out of it. I doubt I broke the wire connection, just the plastic housing of the harness. I then saw a small tab which I could press with a small screwdriver, and a viola the back of the easily harness popped off. One down.
In front, I did not have the box in your pictures. I had two side by side small black housings, one the mic, one the homelink gear. Since I don't have wireless, I simply unhooked the harness on the mic - second mic down. My wires were purpose and white, not red. I do not have wireless or blue tooth, so no worries about keeping any function in the mic. Quick and simple and reversible, and no more blasting ANC tones from my powered sub.
Like most posters, I do not hear any audible difference in the sound of the engine in eco mode, or additional road noise, with the ANC disabled. There is sound, like any engine, but I cannot confirm any actual change.
Thanks again -
