TSB - OUTSIDE REAR COMBINATION LAMP WATER INTRUSION - This bulletin provides the procedure to replace the outside rear combination lamp pads on some 2011-2015MY Optima (TF), produced from August 12, 2010 through July 23, 2015, and some 2011-2016MY Optima (TF HEV) vehicles, produced from February 15, 2011 through July 22, 2015, which may exhibit evidence of water intrusion in the outside rear combination lamps.