3684275 ECM ECU for Cummins CM871 ISX Diesel Engine Control Module. Note: All Ecms Are Blank, With No Programs Installed. Experienced Technician Is Always Recommended For Installation Or Removal Of The Engine Control Module. Programming Of Module Is Required To Function It Correctly With The Engine. As Every Engine Has Specific Requirements. Part Name: Electronic Control Module, Engine Control Unit Module. Way Of Use: Direct Replacement. If There Is Any Problem During This Period, Repair Or Replacement Service Will Be Provided.