349D2 ECM Replacement: Engine Computer Board for CAT D-Series Excavator Control module for the CAT 349D2 and the wider D-series excavator fleet - supplied against 366-8821 / 366-8821-00 with the 20R-2323 reman line as the exchange option. C13-class engine deck, label and serial matched before shipment, anti-static packed. Key Features ECM / engine computer board supplied against 366-8821 and the 366-8821-00 revision Remanufactured exchange route: 20R-2323 Fitted on the CAT