So my WRX seems to have developed an issue where when turning the wheel sharply, there's a knock, like something's hitting something. Then a knock as I turn the wheel back to straighten it. It only happens when turning the wheel very sharply, like when backing out of a parking spot, not when making regular turns. It's under warranty, but any thoughts from the car gurus on what it could be and how serious it is? Is it "OMG, tow it to the dealer before the wheel falls off" serious, or "It can wait until your next oil change in November" serious? Or somewhere in between I'm guessing.