Kubota 1J508-53076 Common Rail Fuel Injector Kit for V3800 Engines

The Kubota 1J508-53076 is a genuine Kubota fuel injector kit (Kubota catalog listing “INJECTOR,KIT”) for the 3.8L V3800 common-rail Tier 4 Final engine family. It is a Denso-built common-rail injector and the current factory supersession of part numbers 1J508-53070 and 1J508-53074, so if your parts diagram shows either earlier number, 1J508-53076 is the kit Kubota supplies today. Worn or fouled injectors show up as hard starting, rough idle, smoke, poor fuel economy, and lost power. A genuine Kubota injector restores factory spray pattern, flow calibration, and emissions compliance.

Application & Fitment

This injector kit fits the Kubota V3800-TIEF4 (also listed as V3800-CR-TE4) electronic common-rail diesel, used in:

• Kubota SVL95-2S and SVL95-2SC compact track loaders
• Kubota SVL97-2 and SVL97-2C compact track loaders
• Kubota M5 series tractors, including the M5-091 and M5-111 (HD and HDC variants)
• Kubota M6 series tractors such as the M6-101DTC (listed under this kit’s predecessor part numbers, call to verify)

The same Denso injector also serves the CAT C3.8B, a Kubota V3800-based common-rail engine, in CAT 272D2, 297D2, 299D2, and 299D3 loaders under CAT part number 482-8434. That cross-reference is published against the predecessor Kubota numbers this kit replaces, so call us to verify it against your engine serial number before ordering for a CAT machine.

Fitment always comes down to the serial number. Have your engine model and serial number ready and we will confirm the exact injector for your machine before anything ships.

Cross-Reference Part Numbers

• Kubota 1J508-53070 | superseded by 1J508-53076
• Kubota 1J508-53074 | superseded by 1J508-53076
• Denso 295700-0100 and Denso 295700-0101 | published for the predecessor Kubota part numbers this kit replaces
• CAT 482-8434 | Fuel Unit Injector for the CAT C3.8B, listed against predecessor 1J508-53074

Because the Denso and CAT numbers are published against earlier numbers in this supersession chain, confirm your application with us if you are cross-referencing from one of them.

Frequently Asked Questions

Will 1J508-53076 fit my SVL95-2 or SVL97-2 track loader?

Yes. The SVL95-2S, SVL95-2SC, SVL97-2, and SVL97-2C run the Kubota V3800-TIEF4 common-rail engine this kit serves. Give us the engine serial number and we will confirm it against the Kubota parts system before you order.

Why buy a genuine Kubota injector instead of an aftermarket one?

These are Denso-built common-rail injectors, flow-calibrated to tolerances aftermarket copies rarely match. Each injector carries a correction code that must be programmed into the engine ECU at installation, and a genuine kit comes with a valid code, the correct seals, and Kubota warranty backing. As a shop that rebuilds common-rail systems every day, we know exactly what separates a genuine injector from a cheap copy, and at the injection pressures a V3800 runs, injector quality is not the place to save money.

How do I order this injector kit?

Call 530-668-0818 with your engine model and serial number, or send them through our contact page. We will confirm fitment, quote current pricing and lead time, and advise on quantity. On higher-hour engines, replacing injectors as a complete set is commonly recommended so all cylinders stay balanced.

Why source your Kubota parts from Valley Fuel Injection

As an authorized Kubota dealer and diesel fuel injection specialists, Valley Fuel Injection & Turbo supplies genuine Kubota engines and fuel-system parts, and we rebuild the very common-rail systems these injectors serve. Diesel is all we do, and we have done it from Woodland, California since 1993.

Pricing & availability: this genuine Kubota injector kit is supplied to order. Call 530-668-0818 or request a quote for current pricing, availability, and lead time. Have your engine model and serial number ready so we can confirm the exact part for your machine.

Why do I see this common rail injector cheaper online?
Short answer: it is usually not the same part — and common rail does not forgive “close enough.” Read why ↓

Search any OE number and eBay, Amazon and a dozen storefronts will show it well under dealer cost, sold by outfits with no name, no address and no phone number. We lose business to those listings every week — and we see a lot of them come back through our shop. Here is what is actually different.

• The part number proves nothing on its own. Counterfeit injectors and pumps are stamped with the same OE numbers as the real thing, in housings cast to look identical. The number in the listing title tells you what the seller claims it is, not what came off an OE line.
• “Remanufactured” is not a regulated word. A genuine reman unit is stripped to bare components, has its wear parts replaced — nozzle, plunger and barrel, solenoid, seals — and is then run on a calibration bench until it meets the original flow and response spec. A cheap one is very often cleaned, resealed, painted and shipped. Both get called remanufactured.
• No full teardown, so no idea what is worn. A proper rebuild means the unit comes apart completely and every part gets inspected and measured against spec — not just the ones that are obviously bad. Skip the teardown and you are reusing worn internals inside a freshly painted housing. It will run on the truck. It will not last.
• No factory-spec bench load testing. A unit is not finished until it has been run under load on a test bench and made its numbers across the range, not just at one easy point. That bench time is most of what you are paying for. Sellers working on price cut it first, because nobody can see it in a photo.
• The warranty has to be honored by someone. Everything we remanufacture in house carries a one-year warranty, with 30 days on electrical components. Parts we supply as an authorized dealer carry the manufacturer’s own warranty. Either way you call us, a real shop in California, and we sort it out. A marketplace warranty usually means shipping the part overseas at your own cost and hoping for a reply.
• No core program. We credit your rebuildable core back in full. Discount sellers generally will not take one, so the gap narrows the moment you account for the core you are now stuck holding.
• Common rail has no tolerance for “close enough.” These injectors meter fuel in fractions of a millisecond at pressures north of 20,000 psi, across multiple events per stroke. A nozzle or control valve that is merely near spec will not throw a code on the bench at idle — it shows up as a cylinder that runs hot, a balance rate that drifts, fuel in the oil, or a rail pressure fault six months out. And the labor to go back in is the same as it was the first time.

We are an authorized dealer and a working fuel-injection shop — we have been rebuilding and testing this hardware in Woodland since 1993, and the people who answer the phone are the people who run the benches. Not sure this is the right part for your engine? Call us with your serial number before you order and we will confirm it. Send your rebuildable core back and the core charge is refunded. And if a price somewhere else looks too good, call 530-668-0818 and we will tell you straight whether it is a deal or a problem.