TSB: SERVICE ACTION: AVN SYSTEM UPGRADE (SA189) - THIS BULLETIN PROVIDES THE PROCEDURE FOR UPGRADING THE NAVIGATION SYSTEM SOFTWARE OF SOME 2013MY OPTIMA (TF/QF) AND SOME 2013MY SOUL (AM) VEHICLES, TO IMPROVE BLUETOOTH® CONNECTIVITY. KIA IS REQUESTING THE COMPLETION OF THIS SERVICE ACTION ON ALL AFFECTED VEHICLES. BEFORE CONDUCTING THE PROCEDURE, VERIFY THAT THE VEHICLE IS INCLUDED IN THE LIST OF THE AFFECTED VINS.