ECM ECU Diesel Engine Computer Module 3408501 For Cummins ISM11 M11 QSM11. ECM ECU Diesel Engine Computer Module For Cummins ISM11 M11 QSM11. For CUMMINS ISM11 M11 QSX15 QSM11. About the remanufacturing process. Remanufactured with OE Components and tasted Fuctionally. 1x Engine Computer ECM ECU. If you have any questions about the product or compatibility, we’d be delighted to hear from you. Thank you for your understanding and support. Please provide a complete physical address when ordering.