Genuine Kubota fuel injector assembly, part number 1J801-53052, for the V2403-CR and D1803-CR common rail engine families. It is a Bosch-built injector (Bosch number 0445110777) supplied in genuine Kubota packaging. The same injector in Bosch packaging is listed as Bosch 0445110777.

Valley Fuel Injection & Turbo has specialised in diesel injection since 1993 and is an authorized Kubota dealer. We stock genuine Kubota engine parts, and because we run a full common rail shop on site we can also help you confirm the injector really is the fault before you spend the money on four of them.

Specifications

Fits / Applications

• Kubota V2403-CR, four-cylinder 2.4 L common rail
• Kubota D1803-CR, three-cylinder 1.8 L common rail
• Equipment applications include Kubota L3301, L3901, L4701 tractors and KX040-4 / U48-5 excavators
• Four injectors on a V-series four; three on the D1803
• Kubota D1803-CR-E4B-KEA-2 parts book: listed from engine serial 7GE0001. Before that the book lists 1J801-53050.
• On the other side of a serial break? Send us the serial number and we will check which part number Kubota calls for.

Part Numbers & Cross Reference

Kubota 1J801-53052  ·  Bosch 0445110777

Original-equipment numbers on these platforms change with engine serial, model year and emissions tier, so we do not publish a blanket interchange list that might send you the wrong part. Send us your engine serial number or VIN and we will confirm the exact match against your build before anything ships. That check is free and takes a few minutes.

Related Parts

• Kubota V2403-CR D1803-CR Injection Pump 1J801-50500 (Genuine)
• Kubota Common Rail Assembly 1J804-50603 for L3301 L3901 KX040-4 (Genuine)
• Same fit, other version: Kubota D1803-CR & V2403-CR Common-Rail Fuel Injector | Bosch 0445110777 New (Kubota 1J801-53052)
• Kubota V2403-CR / D1803-CR Fuel Injection Pump 0445020200 (Genuine Bosch)
• Kubota V2403-CR Common Rail Assembly 1J801-50603 (Genuine)

Why Buy From Valley Fuel Injection

We are a diesel fuel-injection and turbocharger shop in Woodland, CA, rebuilding pumps, injectors and turbos on our own benches since 1993, not a drop-ship storefront. When you call, you talk to the people who run our test benches. Confirm fitment against your engine serial, VIN or build date before you order. Call us and we will help you match the right part.

Not sure the injectors are the problem? We flow-test and diagnose injector complaints in-house. See our injector testing service before you buy a full set.