CAT 303-2381 ECM ECU Engine Control Module

Product and application lead

CAT 303-2381 is listed as a new electronic control group in public parts records. Other listings point to a C27 engine and an R5 generator-set reference. These are application leads and need to be checked against the original controller.

What the buyer should send

Photograph the label, connector and complete case. Keep 303-2381, suffixes and secondary codes visible. Add the generator-set or engine record, serial information, quantity and destination.

Fitment boundary

Do not turn a C27 or R5 listing into a guaranteed match. Ask whether the offered unit is blank, programmed, used or remanufactured. The connector and housing must agree with the old part before the quote is accepted.

See related controllers in the CAT product range and browse the product catalog before ordering.