Engines | Mounts, , 2003 CUMMINS ISM, Engine ECM, SELLER NOTES: (GOOD USED) 2003 CUMMINS ISM DIESEL ENGINE ECM PART # 3683289, ISM CM570/870, CPL8503, PULLED OFF A 2003 CUMMINS ISM ENGINE IN A 2004 INTERNATIONAL TRUCK, ECM CODE AG20124, ENGINE SERIAL # 35084232, P/N 3683289, ECM SERIAL # 23003159, STOCK # 1810 | ALL OUR ECMS ARE TESTED AND SHIP PRIORITY MAIL! COMES WITH WARRANTY! CONTACT US FOR MORE INFORMATION! OVERNIGHT SHIPPING OPTIONS ARE AVAILABLE! WE ALSO OFFER PROGRAMMING FOR PLUG & PLAY! CALL FOR MORE INFORMATION!