TSB: FRONT STABILIZER LINK REPLACEMENT - This bulletin provides the procedure to replace the front stabilizer links of some Optima (TF/QF), Optima Hybrid (TF HEV) and Rio (UB) vehicles, which may experience an abnormal noise emanating from the front of the vehicle when going over bumps or uneven pavement. To resolve the noise concern, perform the procedure outlined in this bulletin to replace the front stabilizer links with the improved parts.