Part number lookup

KX121-3ST Replacement Parts

Cross-reference and compare 49 replacement listings for OEM / aftermarket part number KX121-3ST. Use this part-number page — not a generic equipment or brand hub — to review price, availability, and fitment before ordering.

49 Matching Products

Coupling Assembly RC411-42630 RP471-42630 for Kubota Excavator KX033-4 KX121-3 KX71-3 KX91-3 U35KubotaCoupling Assembly RC411-42630 RP471-42630 for Kubota Excavator KX033-4 KX121-3 KX71-3 KX91-3 U35$115.99Fuel Filter Assembly 15291-43010 for Kubota KX033-4 KX121-2 KX91-2 KX161-2 L185DT L185F L2050DT L2050F R420 R520KubotaFuel Filter Assembly 15291-43010 for Kubota KX033-4 KX121-2 KX91-2 KX161-2 L185DT L185F L2050DT L2050F R420 R520$115.99Fuel Tank Cap With Keys 459A 411-51122 For Kubota Loader SVL75-2 SVL90 SVL90-2 Excavator KX040-4 KX057-4 KX121-3 U35 U45 U55KubotaFuel Tank Cap With Keys 459A 411-51122 For Kubota Loader SVL75-2 SVL90 SVL90-2 Excavator KX040-4 KX057-4 KX121-3 U35 U45 U55$99.99Over flow Pipe Injector Return Pipe 16454-42502 for Kubota V1903 V2003T V2203 V2403 EngineKubotaOver flow Pipe Injector Return Pipe 16454-42502 for Kubota V1903 V2003T V2203 V2403 Engine$70.29Thermostat Housing Cover 15321-73260 for Kubota Excavator KX040 KX101 Tractor L235 L245KubotaThermostat Housing Cover 15321-73260 for Kubota Excavator KX040 KX101 Tractor L235 L245$59.991 Set Main Bearing 1A091-23480 1A091-23482 for Kubota D1803 MDI EngineKubota1 Set Main Bearing 1A091-23480 1A091-23482 for Kubota D1803 MDI Engine$125.0418Pcs Cylinder Head Bolt 19013-03450 for Kubota Engine V2403 V2203 V2003Kubota18Pcs Cylinder Head Bolt 19013-03450 for Kubota Engine V2403 V2203 V2003$134.003Pcs Cylinder Head Cover Gasket 1G911-14523 for Kubota Engine V1903 V2203 V2003 V2403Kubota3Pcs Cylinder Head Cover Gasket 1G911-14523 for Kubota Engine V1903 V2203 V2003 V2403$144.14A/C Condenser T1065-72220 for Kubota Excavator KX080-3 KX121-3 KX161-3 U45-3 U50-3KubotaA/C Condenser T1065-72220 for Kubota Excavator KX080-3 KX121-3 KX161-3 U45-3 U50-3$526.13A/C Expansion Valve 6A671-75040 for Kubota Excavator KX080-3 KX121-3 KX161-3 U45-3 U45S U45STKubotaA/C Expansion Valve 6A671-75040 for Kubota Excavator KX080-3 KX121-3 KX161-3 U45-3 U45S U45ST$101.00A/C Expansion Valve 6A671-75040 for Kubota Excavator KX080-3 KX121-3 KX161-3 U45-3 U45S U45STKubotaA/C Expansion Valve 6A671-75040 for Kubota Excavator KX080-3 KX121-3 KX161-3 U45-3 U45S U45ST$88.00Bottom Roller RD118-21700 for Kubota Excavator KX121-3 KX040-4KubotaBottom Roller RD118-21700 for Kubota Excavator KX121-3 KX040-4$130.00Bottom Roller RD118-21700 for Kubota Excavator KX121-3 KX040-4KubotaBottom Roller RD118-21700 for Kubota Excavator KX121-3 KX040-4$130.00Bottom Roller RD118-21700 for Kubota Excavator KX121-3 KX040-4KubotaBottom Roller RD118-21700 for Kubota Excavator KX121-3 KX040-4$129.00Bucket Cylinder Seal Kit RD411-71820 for Kubota KX121-3 U45-3 U50-3KubotaBucket Cylinder Seal Kit RD411-71820 for Kubota KX121-3 U45-3 U50-3$74.00Connecting Rod 17311-22010 17311-22012 for Kubota V1500 V1702DI V1902DI V2003-T Engine KX121-2 KX121-3 KX161-2 KX161-3 KX91-3KubotaConnecting Rod 17311-22010 17311-22012 for Kubota V1500 V1702DI V1902DI V2003-T Engine KX121-2 KX121-3 KX161-2 KX161-3 KX91-3$155.64Connecting Rod Bearing 17311-22310 17311-22312 for Kubota D1803 MDI EngineKubotaConnecting Rod Bearing 17311-22310 17311-22312 for Kubota D1803 MDI Engine$88.05Cylinder Block for Kubota Engine V2403 Excavator KX121-3 KX161-3 U45ST U45S U45-3 U45-3SKubotaCylinder Block for Kubota Engine V2403 Excavator KX121-3 KX161-3 U45ST U45S U45-3 U45-3S$3,395.30Cylinder Head Gasket 1G790-03612 for Kubota Engine V2403 V2203 Excavator KX121-3ST KX161-3ST U45STKubotaCylinder Head Gasket 1G790-03612 for Kubota Engine V2403 V2203 Excavator KX121-3ST KX161-3ST U45ST$180.33Cylinder Head Gasket 1G790-03622 for Kubota Engine V2403 V2203 Tractor MX5200F L4060DT L45 L47 L5240HST L6060HST M5140F MX5100FKubotaCylinder Head Gasket 1G790-03622 for Kubota Engine V2403 V2203 Tractor MX5200F L4060DT L45 L47 L5240HST L6060HST M5140F MX5100F$182.21Evaporator 6A671-75030 for Kubota Excavator KX080-3 KX121-3 KX161-3 U45-3 U45S U45STKubotaEvaporator 6A671-75030 for Kubota Excavator KX080-3 KX121-3 KX161-3 U45-3 U45S U45ST$210.00Exhaust Gasket Set 1A091-12350 1A091-12360 for Kubota Engine V1902 V2003 V2203 V2403KubotaExhaust Gasket Set 1A091-12350 1A091-12360 for Kubota Engine V1902 V2003 V2203 V2403$54.30Fan Belt 15469-97010 for Kubota D1403 D1703 V1903 V2003 V2203 EngineKubotaFan Belt 15469-97010 for Kubota D1403 D1703 V1903 V2003 V2203 Engine$9.00Fan Belt 15469-97010 for Kubota L3400DT/HST KX161-3 D1403 D1703 V1903 V2003 V2203 EngineKubotaFan Belt 15469-97010 for Kubota L3400DT/HST KX161-3 D1403 D1703 V1903 V2003 V2203 Engine$89.99Fuel Injection Pump 1G787-51010 for Kubota Engine V2203 V2403 Excavator KX121-3 KX161-3 U45S Loader R520SKubotaFuel Injection Pump 1G787-51010 for Kubota Engine V2203 V2403 Excavator KX121-3 KX161-3 U45S Loader R520S$967.99Fuel Stop Solenoid Valve Guide 1A021-56602 for Kubota Engine D1503 D1703 V2203 V2403KubotaFuel Stop Solenoid Valve Guide 1A021-56602 for Kubota Engine D1503 D1703 V2203 V2403$18.00Glow Plug 1J860-65510 1J860-65512 for Kubota L3200DT L3400DT/HST L3430DT L35 L3800DT L4330DT/GST/HST(C) L4400DT L5030GST L5740HST M4700 M5400 M5700 MX5000DT MX5100DT R420S R520S Engine V2203KubotaGlow Plug 1J860-65510 1J860-65512 for Kubota L3200DT L3400DT/HST L3430DT L35 L3800DT L4330DT/GST/HST(C) L4400DT L5030GST L5740HST M4700 M5400 M5700 MX5000DT MX5100DT R420S R520S Engine V2203$75.99Hydraulic Filter RD401-61270 for Kubota Excavator KX121-3 KX161-3 KX71-3KX91-3 U25S U27-4 U35 U35-4 U35S U35-S2 U45S U45STKubotaHydraulic Filter RD401-61270 for Kubota Excavator KX121-3 KX161-3 KX71-3KX91-3 U25S U27-4 U35 U35-4 U35S U35-S2 U45S U45ST$15.00Hydraulic Filter RD431-62122 for Kubota Excavator KX121 KX161 U45 KX121-3S KX121-3ST KX161-3S KX161-3ST U45-3SKubotaHydraulic Filter RD431-62122 for Kubota Excavator KX121 KX161 U45 KX121-3S KX121-3ST KX161-3S KX161-3ST U45-3S$50.00Hydraulic Oil Cooler RD411-64050 RD411-64052 for Kubota Excavator KX121-3 KX161-3 U45-3 Loader Backhoe M59 M62KubotaHydraulic Oil Cooler RD411-64050 RD411-64052 for Kubota Excavator KX121-3 KX161-3 U45-3 Loader Backhoe M59 M62$848.95Hydraulic Pump Coupling Assembly for Kubota KX55 Sumitomo SH55 Yanmar ViO27-5 ViO55 ExcavatorKubotaHydraulic Pump Coupling Assembly for Kubota KX55 Sumitomo SH55 Yanmar ViO27-5 ViO55 Excavator$100.00Idler Gear 15221-24010 15221-24014 for Kubota Engine D1403 Excavator KX121-3ST KX161-3ST KX91-3S2 U35-S2 U45STKubotaIdler Gear 15221-24010 15221-24014 for Kubota Engine D1403 Excavator KX121-3ST KX161-3ST KX91-3S2 U35-S2 U45ST$112.17Inner Air Filter R2401-42280 for Kubota Excavator KX121 KX057 KX161 Tractor MX5000 MX5100DTKubotaInner Air Filter R2401-42280 for Kubota Excavator KX121 KX057 KX161 Tractor MX5000 MX5100DT$15.00Joystick Controller Pilot Valve Assy RC448-61712 RC448-61720 for Kubota Excavator KX121-3S KX161-3S KX71-3S KX91-3S U35S U45SKubotaJoystick Controller Pilot Valve Assy RC448-61712 RC448-61720 for Kubota Excavator KX121-3S KX161-3S KX71-3S KX91-3S U35S U45S$909.99LED Head Lamp 3G710-75910 for Kubota KX41-3 KX71-3 KX91-3 M5700 M6800 M8200 M9000KubotaLED Head Lamp 3G710-75910 for Kubota KX41-3 KX71-3 KX91-3 M5700 M6800 M8200 M9000$178.07Muffler RD411-42403 for Kubota Excavator U45-3 U50-3 KX121-3 KX161-3KubotaMuffler RD411-42403 for Kubota Excavator U45-3 U50-3 KX121-3 KX161-3$390.97Oil Pan Gasket Sump 1G780-01620 for Kubota Engine V1903 V2203 V2003 V2403KubotaOil Pan Gasket Sump 1G780-01620 for Kubota Engine V1903 V2203 V2003 V2403$56.71Radiator RD411-42300 for Kubota Excavator U50-3 U45-3 KX121-3 KX161-3KubotaRadiator RD411-42300 for Kubota Excavator U50-3 U45-3 KX121-3 KX161-3$202.00Rear Oil Seal 16433-04460 1643304460 for Kubota KX033-4 KX040-4 KX121-3ST KX91-3S2 U35-4 U35-S2 U45ST MX5200FKubotaRear Oil Seal 16433-04460 1643304460 for Kubota KX033-4 KX040-4 KX121-3ST KX91-3S2 U35-4 U35-S2 U45ST MX5200F$61.32Rocker Arm Shaft 1A091-14260 for Kubota KJ-S150VX KX121-3 KX161-2 L3710DT L3940DT L4060DT L4240DT L4300DT L4400H L4802FKubotaRocker Arm Shaft 1A091-14260 for Kubota KJ-S150VX KX121-3 KX161-2 L3710DT L3940DT L4060DT L4240DT L4300DT L4400H L4802F$97.00Sprocket 68658-14430 68651-14430 RD118-14433 RD148-14430 for Kubota Excavator KX101 KX121-2 S Series KX040-4 KX121-3 KX121-3S KX121-3STKubotaSprocket 68658-14430 68651-14430 RD118-14433 RD148-14430 for Kubota Excavator KX101 KX121-2 S Series KX040-4 KX121-3 KX121-3S KX121-3ST$184.00Swing Motor Pinion Shaft RC411-17133 for Kubota Excavator KX121-3 KX033-4 KX040-4CA KX91-3S U35-4 U35-S2CAKubotaSwing Motor Pinion Shaft RC411-17133 for Kubota Excavator KX121-3 KX033-4 KX040-4CA KX91-3S U35-4 U35-S2CA$191.00Tank Cap for Kubota KX040-4 KX41-3 KX057-4 KX91-3S KX91-3S2 KX121-3S KX121-3STKubotaTank Cap for Kubota KX040-4 KX41-3 KX057-4 KX91-3S KX91-3S2 KX121-3S KX121-3ST$23.89Tank Cap for Kubota KX040-4 KX41-3 KX057-4 KX91-3S KX91-3S2 KX121-3S KX121-3STKubotaTank Cap for Kubota KX040-4 KX41-3 KX057-4 KX91-3S KX91-3S2 KX121-3S KX121-3ST$23.89Top Roller RD411-22900 for Kubota Excavator KX040-4 KX057-4 KX057-5 KX121-3 KX161-3 U45-3KubotaTop Roller RD411-22900 for Kubota Excavator KX040-4 KX057-4 KX057-5 KX121-3 KX161-3 U45-3$167.00Top Roller RD411-22900 for Kubota Excavator KX040-4 KX057-4 KX057-5 KX121-3 KX161-3 U45-3 U45S U55 U55-4 U55-5KubotaTop Roller RD411-22900 for Kubota Excavator KX040-4 KX057-4 KX057-5 KX121-3 KX161-3 U45-3 U45S U55 U55-4 U55-5$199.00Top Roller RD411-22900 for Kubota Excavator KX040-4 KX057-4 KX057-5 KX121-3 KX161-3 U45-3 U45S U55 U55-4 U55-5KubotaTop Roller RD411-22900 for Kubota Excavator KX040-4 KX057-4 KX057-5 KX121-3 KX161-3 U45-3 U45S U55 U55-4 U55-5$170.00Track Adjuster Cylinder RC411-21503 for Kubota Excavator KX040-4 KX121-3 KX91-3 U35 U35-S2KubotaTrack Adjuster Cylinder RC411-21503 for Kubota Excavator KX040-4 KX121-3 KX91-3 U35 U35-S2$546.00Track Adjuster Cylinder RC411-21606 for Kubota Excavator KX040-4 KX121-3 KX91-3 U35 U35-S2KubotaTrack Adjuster Cylinder RC411-21606 for Kubota Excavator KX040-4 KX121-3 KX91-3 U35 U35-S2$404.00

Part Numbers and Cross References

RC411-42630RP471-42630RC601-42630HRC60-42630KX121-3KX121-3SKX121-3STKX91-3KX91-3SKX91-3S215291-43010KH-51HKH-61HKX033-4KX121-2KX161-2KX161-3SKX161-3ST411-51122RD411-51122KX040-4KX057-4KX41-316454-42502V1903V2003TV2203V2403KX161-315321-73260KX040KX101KX121KX161KX151KH-1101A091-234801A091-23482D180319013-03450V20031G911-14523U45STMX5200FT1065-72220KX080-3KX080-3TKX080-3MCKX080-3SKX121-3SCAKX121-3STCA6A671-75040447500-1850RD118-21700RD148-21700RD411-71820U45-3SU45-3ST17311-2201017311-2201217331-2201017311-22013V1500V1702DIV1902DI17311-2231017311-22312D1803MDI1A085-010141A085-010181A261-010101G790-03612V2203-MV2403-CR-E4V2403-CR-TE4V2403-CR-TIE4V2403-MV2403-M-DIV2403-M-DI-TV2403-M-T1G790-03622SQ-1210V2203-M6A671-750301A091-123501A091-1236015439-1235015296-12350V1902D1703L2501FL2501HL2800DT/HST1546997010D1403R520S1G787-510131A021-566021J860-655101J860-65512V2203-BV2203-B-GEHL-1V2203-B-JACOBSEN-1V2203-B-SULLAIR-1V2203-BG-SCGC-1V2203-EBV2203-EB-JACOBSEN-1RD401-61270RD431-62120RD431-62122HY90368RD411-64050RD411-64052U35-S2KX057-515221-2401415221240101522124011U45STKubotaSQ-1140-USASQ-1200-USASQ-3170-USAKubota:R2401-42280KX057RC44861712RC44861720KX71-3S3G710-75910KX080-4KX080-4SKX080-4S2RD411-42403RD411-42406RD411-424001G780-0162015469-0162019228-01620RD411-4230016433-04460SQ-3250-USA-SW1A091-14260KJ-T210VX-USAL3710DTL3710DT-HST-CL3710GST68658-14430RD118-14430RD118-14433RD148-1443068651-14430RC41117133KX033-4CAKX040-4CAKX91-3S2CASVL75-2SVL75-2CSVL75CSVL90SVL90-2SVL90-2CRD411-22900RD547-22900RD461-21900KX057-4CARC411-21503RC411-21505RC411-21506RC411-21603RC411-21606RC411-21605

Applications and Fitment Summary

  • Kubota · KX033-4
  • Kubota · KX71-3 CABIN
  • Kubota · KX71-3 CANOPY
  • Kubota · KX71-3S CABIN
  • Kubota · KX71-3S CANOPY
  • Kubota · KX91-3
  • Kubota · KX91-3S
  • Kubota · KX91-3S2
  • Kubota · KX121-3
  • Kubota · KX121-3S
  • Kubota · KX121-3ST
  • Kubota · U35
  • Kubota · U35-4
  • Kubota · U35S
  • Kubota · U35-S2
  • Kubota · s: Kubota Excavator: KX033-4, KX121-3, KX121-3S, KX121-3ST, KX71-3 CABIN, KX71-3 CANOPY, KX71-3S CABIN, KX71-3S CANOPY, KX91-3, KX91-3S, KX91-3S2, U35, U35-4, U35S, U35-S2
  • Kubota · KH-1 10
  • Kubota · KH-51
  • Kubota · KH-51H
  • Kubota · KH-61
  • Kubota · KH-61H
  • Kubota · KX61-2
  • Kubota · KX61-2(S SERIES)
  • Kubota · KX91-2

Frequently Asked Questions

What parts replace OEM number KX121-3ST?

This page lists 49 replacement listings indexed under KX121-3ST. Compare cross references, applications, and pricing before ordering.

How do I confirm fitment for KX121-3ST?

Match the stamped part number first, then verify machine model, engine code, serial number, mounting points, and photos of your old part before checkout.

Can I request a quote if KX121-3ST is not an exact match?

Yes. Use the fitment inquiry form with your machine plate, engine model, and photos. Support can review alternatives or cross references.

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