TSB: 3.5 L MPI - COLD ENGINE START-UP CHATTER - This bulletin provides information related to some 2011-2013MY Sorento (XMa) vehicles, equipped with the 3.5 L engine and produced from October 26, 2009 to July 14, 2012, which may exhibit a concern related to unusually loud engine chatter during initial start-up after sitting for several hours.
