Caterpillar original Diesel Nozzle Assembly Fuel Injector 173-9379 0R-9348 for 3126B 3126E 3126 Engine Parts, Replacement for EX639348 compatible Truck and Excavator equipment original new injector

For procurement, maintenance, and parts distribution teams supporting CAT 3126 series engine operations, the 173-9379 HEUI diesel injector serves as an OEM original replacement component specified for 3126, 3126B, and 3126E engine models. As part of the CAT 3126 product line, this diesel injector features HEUI fuel system architecture and supports engine deployments across industrial, marine, and generator set applications. Its primary OE part number is 173-9379, with a full suite of interchange part numbers provided to simplify part lookup across different cataloging systems.

The injector’s extensive cross-reference number coverage eliminates common part-matching barriers in B2B heavy-duty parts procurement, as it corresponds to a wide range of hyphenated, non-hyphenated, and alternative OEM part identifiers. This broad interchangeability drives operational efficiencies across the supply chain: a single injector SKU can fulfill replacement requests tied to all listed part numbers, supporting inventory consolidation, scheduled maintenance restocking, and aftermarket order fulfillment for B2B buyers.

As a CAT-branded 3126 series component, this replacement injector supports sourcing needs across industrial, marine, and generator set segments within the 3126 engine aftermarket. It supports both planned preventive maintenance stocking and unplanned repair parts sourcing for compatible engine setups, with standardized part numbering to streamline warehouse receiving, work order kitting, and parts verification workflows for all B2B procurement stakeholders.