I'm having the same problem: Kona Blue 2012 GT Premium Brembo, 22k miles, with the factory Pirelli's. Ford replaced the front lower left control arm, but it's still noisy. On the highway, fine..but on any secondary road the front suspension sounds like a tin can full of rocks. If this were an older car, I'd suspect a loose/broken shock or shackle. Back to the dealer this coming Thursday, so we'll see. No problems with the engine, but that crappy Chinese six-speed was a real bad idea. After warranty, it's on to a Tremec. For what we were forced to pay for these cars, I expected a bit more 'roadability' in this area.