This is the Bosch 0432133878, a new nozzle and holder assembly for the Cummins 6BT 5.9L 12-valve engine, listed at the 190 hp (141 kW) rating. It replaces Cummins 3919092 and the Cummins service number 3802255. The injector body carries the ID 9092 and the holder is a Bosch KDAL59P6. It is a Bosch-made part, sold each, and the engine takes six.

Hard starting, white or black smoke, a rough idle, fuel knock and fuel in the oil are the usual signs of worn nozzles on these engines. Mechanical injectors wear as a set, so most shops test or replace all of them at once. A weak lift pump, air in the supply line or a worn injection pump cause the same complaints, so rule those out first. Cummins used more than one injector on the 190 hp 5.9L, and several B-series injectors share the same holder. Match the Cummins number or the body ID, not the shape or the rating alone.

Specifications

Fits / Applications

• Cummins 6BT 5.9L, 12-valve, listed at 190 hp (141 kW)
• Engines that call for Cummins injector 3919092 or service number 3802255
• Old injector stamped with body ID 9092
• Six injectors per engine

Fit a new sealing washer under each injector and make sure the old one is out of the bore. Flush the lines before you connect them, change the fuel filter and bleed the system. Torque the hold-down to the engine manual, not by feel.

Part Numbers & Cross Reference

Bosch 0432133878  ·  Cummins 3919092  ·  Cummins 3802255  ·  Cummins ReCon exchange 3802255RX  ·  Bosch nozzle holder KDAL59P6

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

What Cummins numbers does the Bosch 0432133878 replace?

Cummins 3919092 and the Cummins service number 3802255, also shown as 3802255RX. The body ID stamped on the injector is 9092.

Does it fit a Dodge Ram 12-valve pickup?

We found no catalog that lists it for the pickup. It is listed for the 190 hp 5.9L under Cummins 3919092. Call 530-668-0818 with your engine serial number and we will check.

How is it different from the 0432133861?

Both are listed for the 5.9L at about 190 hp, but they carry different numbers: Cummins 3919092 and body ID 9092 for this one, Cummins 3926819 and body ID 6819 for the 861. Order by the number on your old injector, or send us the CPL.

Is it new, and do I send my old injector back?

It is a new Bosch injector, not a rebuild. It is sold outright, so there is no core to return.

Related Parts

• Cummins 6BT 5.9L 12-Valve Mechanical Fuel Injector, 210 hp (3926820, 3802548) | Bosch 0432133858 New
• Cummins 6BTA 5.9L Marine Mechanical Fuel Injector (3897197, 3802621) | Bosch 0432133854 New
• Cummins 4BT 3.9L & 6BT 5.9L Mechanical Fuel Injector (3926819, 3802547) | Bosch 0432133861 New
• Cummins 4BT 3.9L, Case, Kobelco VE4 Injection Pump 0460424081 | Bosch Authorized Remanufactured by VFI
• Bosch P7100 Inline Injection Pump 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.