Tl* the contact owns a 2006 chevrolet hhr. the contact stated while driving approximately 10 mph over railroad tracks, a noise emitted outside of the vehicle. the failure also recurred when encountering a bump or pothole. the vehicle was taken to an authorized dealer on three separate occasions where the stabilizer link, sway bar and bushings, and front struts were replaced. the manufacturer was not notified of the failure. the approximate failure mileage was 12,000. updated 8/19/14*cn updated 08/23/2017*ct