(Used) 2012 Freightliner B2, ENGINE ECM- ESN: 73221132, Engine: P-54201, Serial Number: 29392, Part Number: 4993120, Ecm Code: BZ90023.15, For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY, ELKTON, MD 21921