The LiftMaster K-N7J3343M E-BOX, also referenced as N7J3343M, is an OEM electronics enclosure assembly used on select LiftMaster operators. Commonly referred to as the “E-BOX,” it provides the mounting and protective housing for the control components and wiring harnesses that run the operator, helping organize connections and shield the electronics in daily use. This factory part is intended as a direct replacement to restore proper operation and fitment when the original enclosure is damaged or worn.
As a genuine LiftMaster replacement part, K-N7J3343M maintains original form and mounting alignment for compatible models listed in the operators’ parts manuals. Typical applications include residential and commercial LiftMaster gate or door operators where the E-BOX secures the control board and terminal connections. For best results, verify compatibility by part number against your specific operator’s documentation. Installation should be performed by a qualified technician with power disconnected; transfer the existing control board and harnesses into the new E-BOX, secure all fasteners, and test safety inputs and limits after re-energizing the system. Buyers often search this part as “LiftMaster E-BOX,” “N7J3343M,” or “K-N7J3343M replacement control box” when repairing or maintaining a LiftMaster operator.