CUMMINS ISL 8.9L ECM ECU CPL3664 DIESEL ENGINE COMPUTER MODULE PART# 5317106. CUMMINS ISL 8.9L ENGINE CONTROL MODULE (ECM) P/N 5317106 CPL3446 CM2350. MODEL: ISL ENGINE ECM, ECU. This is a USED Cummins ISL Engine Control Module (ECM, ECU) Engine Computer Part# 5317106 CPL 3446. This ECM has been fully tested and inspected and is functioning perfectly. All ECMs are fully tested and certified before being placed into stock. Please give us a call and we will be happy to answer any questions you have! ?????? Boots and Hanks Truck Parts, Inc. Has the largest selection of used truck parts in Northeastern Pennsylvania. With locations in Scranton and Harrisburg, Pennsylvania, we sell used truck engines, transmissions, rears, ECMs, body parts, wheels and truck tires. Boots and Hanks Truck Parts, Inc. Has an extensive selection of late model truck parts for sale. If we do not have the part you are looking for we will do our best to find it for you. Boots and Hanks Truck Parts Inc. Please make sure your part numbers and or serial numbers match the product you are purchasing. We are not responsible for a part not fitting correctly. All products are tested and certified as “quality used” before being placed into stock. Please give us a call and we will be happy to answer any questions you have!!