OWNER LETTER: DEAR KIA OPTIMA OWNER: KIA MOTORS AMERICA, INC. IS CONDUCTING A VOLUNTARY SERVICE CAMPAIGN TO UPDATE THE ENGINE CONTROL UNIT (ECU) IN CERTAIN 2012-2013 MY OPTIMA VEHICLES WHICH COULD OTHERWISE EXPERIENCE A DECREASE IN ACCELERATION ACCOMPANIED BY THE ILLUMINATION OF THE “CHECK ENGINE” OR MALFUNCTION INDICATOR LAMP (MIL).
