This is the Bosch 0445120272, a new common-rail fuel injector made by Bosch, not a rebuild. It fits the Cummins ISC 8.3L with Bosch common rail, cataloged for 2003 to 2013, and it is the injector Case IH and New Holland sell as 87581565 for Magnum, MX, T8000 and TG tractors. It replaces Cummins 5263305, 4940439, 3973059 and 3965720 and the earlier Bosch numbers 0445120112 and 0445120035. Sold as one injector; the engine takes six.

The remanufactured version of this injector carries Bosch number 0986435532. We list that one separately as a Bosch Authorized Remanufactured injector rebuilt by Valley Fuel Injection & Turbo, and Alliant Power remanufactures the same injector as AP55532. All three fit the same engines. Match the number before you order: Case IH Magnum and New Holland T8000 tractors are also listed with CNH 84346812 and CNH 84347519, which are different injectors. Hard starting, a rough idle, a miss under load, smoke, fuel in the oil or low rail pressure from high injector return flow are the usual reasons these get replaced. Rule out the fuel filters, the supply side and the connector tubes before you condemn a set.

Specifications

Fits / Applications

• Cummins ISC 8.3L with Bosch common rail, 2003 to 2013
• Case IH Magnum 215, 245, 275, 305 and 335 and MX215, MX245, MX275 and MX305 tractors that carry CNH injector 87581565
• New Holland T8010, T8020, T8030, T8040 and T8050 and TG215, TG245, TG275 and TG305 tractors that carry CNH injector 87581565
• A tractor model alone is not enough: these Case IH and New Holland tractor lines are also listed with CNH 84346812 and CNH 84347519, which are different injectors
• Engines that take Cummins injector 5263305, 4940439, 3973059 or 3965720
• Not for EPA 2007 and later ISC engines with the Cummins XPI fuel system, or for 8.3L engines that take Cummins 4993482 (Bosch 0445120133)
• Six injectors per engine

This injector comes with its seal ring (base washer). The high-pressure connector (feed) tube is a separate part: Bosch F00RC00647 is the tube listed for this injector, the same Bosch tube used on the 6.7L Ram. Change the fuel filters and keep everything clean when you fit injectors: dirt in the high-pressure side is the usual cause of an early repeat failure. Sellers of these injectors recommend new high-pressure connector tubes with new injectors on the 8.3L common rail, because a worn or dirty tube contaminates the new injector. At the least, pull the tubes and inspect them closely.

Part Numbers & Cross Reference

Cummins 5263305  ·  Cummins 4940439  ·  Cummins 3973059  ·  Cummins 3965720  ·  Cummins 5263305PX  ·  Case IH / New Holland 87581565  ·  Bosch (earlier number) 0445120112  ·  Bosch (earlier number) 0445120035  ·  Bosch remanufactured version 0986435532  ·  Alliant Power remanufactured version AP55532

Cross-reference numbers can change with engine serial, build year and emissions tier, so treat this list as a starting point. Send us your engine serial number and we will confirm the exact match against your build before anything ships. That check is free and takes a few minutes.

Frequently Asked Questions

Will the Bosch 0445120272 fit my Cummins ISC 8.3?

It fits the ISC 8.3L with Bosch common rail, cataloged for 2003 to 2013, on engines that take Cummins 5263305, 4940439, 3973059 or 3965720. EPA 2007 and later ISC engines with the XPI fuel system take a different injector. Call 530-668-0818 with your engine serial number and we will confirm it.

Does it fit Case IH and New Holland tractors with the Cummins 8.3?

It is the injector Case IH and New Holland sell as 87581565, which sellers list for Case IH Magnum 215 to 335 and MX215 to MX305 tractors and New Holland T8010 to T8050 and TG215 to TG305 tractors. Those tractor lines are also listed with CNH 84346812 and CNH 84347519, which are different injectors. Give us the number on your old injector, or the tractor model and engine serial number, and we will check it before you order.

What numbers does the Bosch 0445120272 replace?

Cummins 5263305, 4940439, 3973059 and 3965720, Case IH / New Holland 87581565, and the earlier Bosch numbers 0445120112 and 0445120035.

Is the 0445120272 new or remanufactured, and is there a core?

It is a new Bosch injector, not a rebuild, and it is sold outright with no core to send back. The remanufactured versions of the same injector are Bosch 0986435532 and Alliant Power AP55532.

Related Parts

• Cummins ISC 8.3L, Case IH & New Holland Common-Rail Fuel Injector | Alliant Power AP55532 Remanufactured
• Cummins QSC 8.3L Common-Rail Fuel Injector | Bosch 0445120133 New (Cummins 4945463, 4993482)
• Cummins QSC 8.3L Common-Rail Fuel Injector | Alliant Power AP55133 Remanufactured (Cummins 4993482)
• Cummins ISC & ISL 8.9L HE300VG Turbo Actuator Kit | Holset 6382091HX Remanufactured
• Common Rail Diesel Injector Testing & Rebuild Service

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 test these units. We verify fitment against your engine serial, VIN or build date before anything ships, so the right part arrives the first time.

Not sure the injectors are the problem? We test and diagnose in-house before you buy. See our common rail injector testing and rebuild service.