Genuine Kubota Fuel Injector Kit 1J783-53074

The 1J783-53074 is a genuine Kubota common rail fuel injector kit for the current Stage V / Tier 4 Final generation of Kubota’s 3.3L V3307 diesel engine family. This is the factory injector kit Kubota specifies for these machines, supplied new in genuine Kubota packaging. Valley Fuel Injection is an authorized Kubota dealer, so every injector we ship is genuine and backed by Kubota, never gray market and never a lookalike.

Common rail injectors run at extreme pressures with micron-level tolerances, and this generation of the V3307 is unforgiving of off-brand parts. If your machine is throwing injector codes, smoking, hard starting, or losing power, we can help you confirm the diagnosis before you buy. Our shop has specialized in diesel fuel injection since 1993, and we work on common rail systems every day.

Application & Fitment

Kubota lists injector kit 1J783-53074 for the following machines:

• Kubota KX080-4S2 excavator
• Kubota KX080-5 excavator
• Kubota SVL75-3 compact track loader
• Kubota SVL75-3C compact track loader
• Kubota M4-071HDC12 tractor
• Kubota M4D-071HDC12 tractor

These machines run the newer Stage V / Tier 4 Final evolution of the V3307 common rail engine. The SVL75-3, for example, is published with the V3307-CR-TE5 series engine. Important: this is not the injector for the earlier SVL75-2, KX080-4, or M6060/M7060 machines, which use the 1J770 series injector instead. If your machine is not listed above, or you are working on a bare Kubota engine, call us with the engine model and serial number and we will verify the correct injector before anything ships.

Cross-Reference Part Numbers

1J783-53074 is the latest number we have verified in Kubota’s 1J783 injector series. Earlier numbers in the same series include:

• Kubota 1J783-53050
• Kubota 1J783-53070
• Kubota 1J783-53073

These older numbers appear to supersede to 1J783-53074, but supersession data changes, so if your parts book calls out one of them, confirm with us first. We have not verified any published Denso or Caterpillar cross number for this injector. If you are trying to match a number from another brand or an aftermarket box, call and we will cross it for you.

Frequently Asked Questions

Which machines does the 1J783-53074 injector fit?

Confirmed applications are the Kubota KX080-4S2 and KX080-5 excavators, SVL75-3 and SVL75-3C compact track loaders, and M4-071HDC12 and M4D-071HDC12 tractors. These are the Stage V / Tier 4 Final generation machines built on the V3307 common rail engine. When in doubt, give us your engine serial number and we will confirm fitment before you order.

Is this the same injector as the 1J770-53075 used on the SVL75-2 and KX080-4?

No. The 1J770 series injector serves the earlier Tier 4 V3307-CR-TE4 machines such as the SVL75-2, KX080-4, and M6060/M7060 tractors. The 1J783-53074 serves the newer generation listed above. Kubota assigned different part numbers for a reason, so do not interchange them. If you are not sure which generation you have, the engine serial number settles it in one phone call.

Should I replace one injector or all four?

It depends on why the injector failed. A single high-hour injector can sometimes be replaced on its own, but if the failure came from fuel contamination, water, or debris, the other injectors and the rail have usually seen the same abuse. We can test your remaining injectors and go through the common rail system with you so you fix it once instead of chasing repeat failures.

Why Buy From Valley Fuel Injection?

Valley Fuel Injection & Turbo in Woodland, California has specialized in diesel injection since 1993. We are an authorized Kubota dealer for engines, parts, and service, and we are also a working injection shop, so the people answering the phone diagnose and repair these fuel systems every week. That means the correct part the first time, straight answers about what actually failed, and support after the sale that a box-mover cannot match.

Pricing & Availability

Call 530-668-0818 for current pricing and availability on the 1J783-53074 injector kit, or reach us through our contact page. Please have your engine model and engine serial number ready so we can verify fitment and any supersession before you order.