CUMMINS ISB 6.7 ECM ECU PART#4993120 CM2250 CPL3335 DIESEL ENGINE COMPUTER. Please Note: This is a. Expect normal signs of wear such as dirt, grime, grease, oil, and surface wear. All photos are of the exact item you will receive. Review carefully to confirm condition and compatibility. If you’re unsure of fitment, send us your VIN before purchasing and we’ll be happy to confirm.