2012 Cummins ISB, School Bus, ECMs, Fits to: Freightliner B2, (Used) 2012 Freightliner B2, ENGINE ECM- ESN: 73217865, Engine: P-53883, Serial Number: 29330, Part Number: 1993120, For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY, ELKTON, MD 21921, Serial# 73217865, Casting# 73217865, Truck Year 2012 4UZABRDU8CCBH0152