This is the Bosch 0432193646, a new mechanical fuel injector (nozzle and holder assembly) made by Bosch, not a rebuild. It fits the 1998 to 2002 Cummins ISB 5.9L 24-valve engine with the VP44 pump, midrange version, at the 175 hp rating. It replaces Cummins 3944205 and 3944206.

These midrange injectors look alike and differ by horsepower rating, so the number has to match the engine data plate. The other ratings in this family are Bosch 0432193645 (190 to 195 hp) and 0432193647 (210 to 215 hp). The Dodge Ram pickup engines take their own numbers. A miss at idle, white or gray smoke, a fuel knock, hard starting or fuel in the oil can all come from a worn nozzle or a low opening pressure. On these VP44 engines a weak lift pump or a failing injection pump gives some of the same complaints, so check supply pressure and pump codes before you replace a set. The engine takes six injectors.

Specifications

Fits / Applications

• Cummins ISB 5.9L 24-valve midrange engine, 1998 to 2002, 175 hp rating
• Other midrange ratings are listed under Bosch 0432193645 (190 to 195 hp) and 0432193647 (210 to 215 hp)
• Dodge Ram pickups are listed under other Bosch numbers
• Six injectors per engine

Fit a new sealing washer under each nozzle, keep the bore clean and torque the hold-down to the engine maker’s figure. On the 24-valve head, fuel reaches the injector through a connector tube in the side of the head: check each tube tip and its o-ring, and replace any that are marked or leaking. The tube is a separate part, Bosch F00ZR20002 (Cummins 3944833), one per cylinder. Change the fuel filter at the same time.

Part Numbers & Cross Reference

Bosch 0432193646  ·  Cummins 3944205  ·  Cummins 3944206

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

Which ISB 5.9L does the Bosch 0432193646 fit?

The 1998 to 2002 ISB 5.9L 24-valve midrange engine rated at 175 hp. Check the rating on your engine data plate, or call 530-668-0818 with the engine serial number.

What numbers does it replace?

Cummins 3944205 and 3944206. Match it to the number on your old injector.

Can I use it in place of the other ISB 24-valve injectors?

Order the injector listed for your rating. Bosch 0432193645 (190 to 195 hp) and 0432193647 (210 to 215 hp) cover the other midrange ratings, and the Dodge Ram pickup is listed under different numbers again.

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

It is a new injector made by Bosch. It is sold outright, so there is no core to return.

Related Parts

• Cummins ISB 5.9L 24-Valve Midrange Fuel Injector (210-215 hp) | Bosch 0432193647 New (Cummins 3944197)
• Cummins ISB 5.9L 24-Valve (190-195 hp) & Case CX210, CX240, CX290 Fuel Injector | Bosch 0432193645 New
• 2001-2002 Dodge Ram 5.9L Cummins 24-Valve High Output Fuel Injector (245 hp) | Bosch 0432193581 New
• Freightliner Cummins ISB 5.9 Mid-Range VP44 16X | 0470506029 | Bosch Authorized Remanufactured by VFI
• Mechanical 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.