TSB: ENGINE VIBRATION AT IDLE - THIS BULLETIN PROVIDES THE PROCEDURE TO REPLACE THE ALTERNATOR PULLEY. SOME 2014-16MY FORTE (YD) VEHICLES WITH 1.8L AND 2.0L NU ENGINES MAY EXPERIENCE AN UNUSUAL ENGINE VIBRATION AT IDLE THAT IS SOMETIMES MORE PREVALENT UNDER CERTAIN ELECTRICAL LOADS. TO CORRECT THIS CONCERN, REPLACE THE EXISTING ALTERNATOR PULLEY WITH A NEW ONE FOLLOWING THE SERVICE PROCEDURE IN THIS BULLETIN.