So, tab behind the mirror didn't fix anything. My dealership is getting permission to replace the driver side catalytic converter. I think they're onto something this time because it definitely sounds like it's coming from that vicinity.
I'll keep updating the post as it unfolds.
Update* the dealer ordered a part that was a service bulletin suggestion. Some tabs on the back of the mirror? Strange. They'll install it in a week or two then of it works I'll report back with part numbers and such. As of now, still sounds like baby farts when windows are closed and I step on...
Does anyone experience a noise when accelerating? Started at 3800 miles, almost sounds like the engine is "farting". Like the kind of noise babies make when they put their mouths on their arm and blow. Can't hear it with the windows down. Ac has nothing to do with it, radio on or off has no...