My 2011 CX-9 GT FWD with 11,800 miles JUST started doing this...or me searching for resonance/buzz as I have brought me to this thread. It has been perfect, until last Saturday & hurricane rainy weather. Did nothing different but drive home on the highway and the next day driving through a parking lot with the roof open, and starting out/first accelerating, would hear a buzz/resonance up front that sounds like a metal buzz. Over a week later, it's louder and louder, and definitely coming from the front. Accelerate, from a stop and then again as it nears the gear change to 2nd & 3rd and buzz again.
Need to take it in. Sounds terrible. Anyone ever get a resolve to the above? Seems like it may be exhaust related, but I can't figure out how it just started.