7 0 2006 Cummins QSB-155C Engine Control Module (ECM) for 2004-2006 Part # 3990517, CM550 $600 USD (GOOD USED BENCH TESTED W/ WARRANTY) 2006 Cummins QSB5.9 CM550 Engine Control Module (ECM) 3990517 For Sale, NON-EGR Model, CM550, Part # 3990517, ECM Code J91703.07, CPL 8300, 155HP @ 2600... ConditionUsedWill Fit Year(s)2004-2006Part Number3990517Stock Number9352 MLS Number13740263CategoryEngine Control Modules (ECM) Last Updated8/4/2025 LocationOpa Locka, FL, US Sold ByCA Truck Parts Inc. (305) 688-___ SHOWNUMBERCall Seller Email Seller Save More Info