I noticed that when I go over sharp bumps, I can hear a plasticky type of thud/rattle sound coming from below the gas pedal area. The thud is heavy...kind of like if my front sway bar is loose and it resonates when hitting a sharp bump (not a metal sound). When I go over rolling bumps, there's no sound. Anyone have this issue? I haven't had the chance to check the underside, but will do it this week. I had noticed the sound months ago (April) after I went off roading at Gorman, but the sound is more pronounced now. I had noticed it after July 4th weekend when I took it to White Mountain Peak (dirt road all the way up 11,000 feet), then to Titus Canyon Road in Death Valley. A couple of weeks after that, I took it up Rowher Trail in Santa Clarita. The car drives straight and there's no play on the steering wheel when it hits a bump.