PITSTOP: UPDATED SPARK PLUG FOR 2.0T THETA-II - This bulletin has been revised to include additional information. This Pitstop provides information regarding the updated spark plug for vehicles listed below, equipped with 2.0T Theta-II engines, which may not yet be available in the Electronic Parts Catalog (EPC). If not available, the updated spark plug must be ordered manually. This updated spark plug has been improved with the thread shoulder lengthened to enhance protection of the insulator from combustion heat.