Ok, so I was having the same issue about the popping or pinging noise when turning tight turns. Also when standing still I would turn the wheel all the way to the left *POP* and then turn all the way back to the right *POP*. Took the car to the dealership and they told me that i had broke my strut mount. At first they told me that it was not covered under warranty. I gave them hell because i have only beendriving this car for 5000 miles since i bought it used and at that time it had 28000 miles on it. Eventually it got tossed up to Mazda corporate and they ended up coveringit under warranty. So....... they replaced the strut and shock for me, on the work order they gave me it said Strut bearing and shock. they told me strut mount. Anyways, now the *POP* noise is gone. Now all i hear is the hollow tump, tump tump tump tump noise telling me i need new tires. They told me i had less than 20% thread left.
Oh and i live in Maryland where it gets really Effin cold so maybe that was one of the issues too.