Excavator Engine Parts

371-3974 Common-Rail Fuel Injector for Cat C7.1 Excavators

Q: What numbers are documented for 371-3974?

Primary Part Number: 371-3974. Formatted Alias: 3713974. Remanufactured Service Number: 20R-4560. Archived Source Reference - Verify Relationship: T410631. Archived Manufacturer Reference - Verify Relationship: 0445120347. Relationship labels distinguish formatting aliases, direct interchanges, remanufactured references and related assemblies.

Q: How do I confirm 371-3974 before ordering?

Match the complete part number, compare the connector or mounting arrangement with the product photos, and confirm the machine or engine model and serial range. Send clear photos of the original unit when requesting a quote.

371-3974 Common-Rail Fuel Injector for Cat C7.1 Excavators, OEM/reference 371-3974, Common-Rail Fuel Injector, product view 1

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OEM / reference371-3974

SpecificationCommon-Rail Fuel Injector

Catalog ID53091392

Common-rail fuel injector identified by Cat part number 371-3974. Caterpillar's exact-number record confirms C7.1 engine service and a broad equipment list including 320, 323, 326 and 330 excavator families; it also identifies 20R-4560 as the Cat Reman alternative. T410631 and 0445120347 are preserved only as archived source references pending configuration verification. Three matching owned injector views are retained. Confirm the engine arrangement and serial range before ordering.

Product Type: Common-rail fuel injector
Engine Family: Cat C7.1
Condition: New replacement injector

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Part-number relationships

Relationship	Reference family	Number
Primary Part Number	Caterpillar common-rail injector	371-3974
Formatted Alias	Same number without separator	3713974
Remanufactured Service Number	Caterpillar official alternative	20R-4560
Archived Source Reference - Verify Relationship	Perkins-formatted source number	T410631
Archived Manufacturer Reference - Verify Relationship	Bosch-formatted source number	0445120347

Product fitment guide

Part numbers and compatible models

Quickly compare the reference number and recorded machine applications. Use the original photos and the checklist before ordering.

Part identification

Reference numbers

Primary number

371-3974

Manufacturer number

0445120347

Formatting alias

3713974

Remanufactured number

20R-4560

Other documented relationship

T410631

Formatting aliases are the same number written differently. Related assemblies and remanufactured numbers are not presented as direct interchanges.

Product summary

Common-Rail Fuel Injector

Category: Excavator Engine Parts
Catalog ID: 53091392
Photo views: 3

Before ordering

Confirm these details

Match the complete part number on the original component.
Compare connectors, mounting points and visible dimensions with the product photos.
Confirm the exact machine or engine model and serial range before ordering.

Machine fitment

Compatible model references

4 model references

Verified engine: Cat C7.1
Verified excavator examples: 320 / 323 / 326 / 329 / 330
Other official equipment examples: 953K / D4 / D5 / D6K2 / 924 / 926 / 930 / 938
Fitment limitation: Confirm engine arrangement, injector calibration and machine serial

Compatibility lists identify searchable model families, not every production serial range. Confirm the original part number and machine serial number before purchase.

Quick fitment answers

Common questions about 371-3974

Which machines use 371-3974?

Recorded compatible model references include Verified engine: Cat C7.1, Verified excavator examples: 320 / 323 / 326 / 329 / 330, Other official equipment examples: 953K / D4 / D5 / D6K2 / 924 / 926 / 930 / 938, Fitment limitation: Confirm engine arrangement, injector calibration and machine serial. Confirm the complete part number and machine serial range before ordering.

What numbers are documented for 371-3974?

Manufacturer number: 0445120347. Formatting aliases for the same number: 3713974. Remanufactured references: 20R-4560.

How do I confirm 371-3974 before ordering?

Match the complete part number on the original component. Compare connectors, mounting points and visible dimensions with the product photos. Confirm the exact machine or engine model and serial range before ordering. Send clear photos of the original unit and connector layout when requesting a quote.

Continue comparing verified references from the same system.

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