Cummins 4921776 Engine Control Module
Cummins 4921776 is an engine control module identified by the original part number. Use that number as the opening point when the old ECM is being replaced, then check the physical unit before moving the request to purchasing.

The knowledge base lists 4921776 with QSB applications across engineering equipment, generator sets, air-compressor equipment, marine engines, and industrial diesel engines. It also appears under marine equipment. These are recorded application leads, so the QSB information, old label, and connector still need to agree.
The list is not a guarantee for every QSB installation. The machine or engine details should come from the old installation, not from a guess based on the part title.
Information Needed For A Check
- old ECM label with `4921776`, if readable;
- connector photo showing the plug, locks and pins;
- engine model or equipment name from the installation;
- housing and mounting-point photos;
- quantity and destination country.
Tell us if the label is worn, the connector is damaged or the unit has been opened. Those details change how much can be confirmed from the photos.
Check The Old Installation
The part number, connector and equipment information should point to the same ECM. If they do not, hold the order until the old installation is checked again.
Quick buying check
Buy this 4921776 unit only after the old label number, connector shape, housing view, and equipment information match your machine photos.
Related Products
Browse more Cummins products and compare the old part number, connector, and equipment information before ordering.