View 4 Photos View 0 Videos Cummins QSB 3.3 Engine Control Module (ECM) Newly Listed $1,000 USD (GOOD USED/ TESTED) Cummins QSB3.3 Diesel Engine Control Module, ECM, ECU, for sale!!! Part #: 4993120; Supersession Part #: 4993121; Service Model Name: CM2250; Stock #: E4437 For more... ConditionUsedPart Number4993120Stock NumberE4437 MLS Number14149957CategoryEngine Control Modules (ECM) Last Updated2/18/2026 LocationHialeah, FL, US Sold ByJJ Rebuilders Inc. (844) 385-___ SHOWNUMBERCall Seller Email Seller Save More Info