Excavator Engine Parts

1A091-21054 Piston Ring Assembly for Kubota KX121-3 KX161-3 D1703

Q: What numbers are documented for 1A091-21054?

Current Manufacturer Part Number: 1A091-21054. Superseded Manufacturer Part Number: 1A091-21010. Superseded Manufacturer Part Number: 1A091-21050. Relationship labels distinguish formatting aliases, direct interchanges, remanufactured references and related assemblies.

Q: How do I confirm 1A091-21054 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.

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OEM / reference1A091-21054

SpecificationEngine Piston Ring Assembly

Catalog ID81075179

1A091-21054 is listed as a Kubota piston-ring assembly and supersedes 1A091-21010 and 1A091-21050. Published equipment coverage includes KX121-3 and KX161-3 arrangements with D1703-family engines, with some catalogs imposing model/serial breakpoints. Confirm the complete number, standard/oversize marking, bore and piston groove dimensions, engine suffix and machine serial before ordering.

Product Type: Engine Piston Ring Assembly
Size Grade: Confirm standard or oversize marking
Bore and Piston Grooves: Compare with engine specification

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Part-number relationships

Relationship	Reference family	Number
Current Manufacturer Part Number	Kubota piston-ring reference	1A091-21054
Superseded Manufacturer Part Number	Replaced by 1A091-21054	1A091-21010
Superseded Manufacturer Part Number	Replaced by 1A091-21054	1A091-21050

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

1A091-21054

Manufacturer number

1A091-21054
1A091-21010
1A091-21050

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

Product summary

Engine Piston Ring Assembly

Category: Excavator Engine Parts
Catalog ID: 81075179
Photo views: 1

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

3 model references

Representative excavators: Kubota KX121-3 / KX161-3
Engine lead: Kubota D1703 family
Fitment limitation: Confirm number, size grade, bore, grooves, suffix and 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 1A091-21054

Which machines use 1A091-21054?

Recorded compatible model references include Representative excavators: Kubota KX121-3 / KX161-3, Engine lead: Kubota D1703 family, Fitment limitation: Confirm number, size grade, bore, grooves, suffix and serial. Confirm the complete part number and machine serial range before ordering.

What numbers are documented for 1A091-21054?

Manufacturer number: 1A091-21054, 1A091-21010, 1A091-21050.

How do I confirm 1A091-21054 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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