I have a 2009 TSX. The problem is is that it sounds like a bb in a tin can banging around! The noise is only when the car is moving until you get around 30 mph. I had a tune up on the car, had the transmission flushed, taken it to numerous mechanics and they all cannot figure out where the annoying noise is coming from!

I've been told it is bad gas, so I use premium. I've bought the additive to add to the gas, and that didn't make a difference. I've been told it is the heat shield, but when I mention that to others they laugh. I had it put up where the wheels spin and the engine is revved and there is no noise, so it is something to do with the car being in motion.

To me (a female!) it sounds like bad gas, when it is not! Some days it is worse than others. I've researched this online and have seen other people post the same problems, but yet to see the answer! Anyone??? Thanks!