Engine Identification B3.9, B4.5, and B5.9 Industria [...] Page E-2 Section E - Engine and System Identification Have the following engine data available when communicating with a Cummins Authorized Repair Location. The information on the dataplate is mandatory when sourcing service parts. 1. Control parts list (CPL) 2. Model 3. Engine serial number 4. Emissions certification 5. Horsepower and rpm rating.