OEM / REF: B5.9SKU: pilotpart061523-8571656863992
Fuel Injector 3977689 for Cummins Engine 4B3.9 6B5.9 B5.9 is a Injectors & Nozzle replacement part for Cummins Engine Spare Parts, categorized under Engine Spare Parts > Injectors & Nozzle. Use OEM part number B5.9 and confirm machine model, engine model, and serial details before checkout.
This Injectors & Nozzle is indexed for Cummins s: 4B3.9, B5.9, 6B5.9, B4.5, ISD4.5, ISB6.7, ISF3.8, B4.5s. Compare reference number B5.9 against the label on your existing Cummins component before ordering.
Additional cross references on file: 6B5.9, B4.5, ISD4.5. If your machine plate shows a different number, submit a fitment inquiry with photos before checkout.
Match the OEM or reference number first, then verify machine model, engine model, serial number, connector layout, mounting points, and old part photos.
Yes. Send the old part number, machine plate, and photos through the fitment inquiry form. Support can review possible replacements or alternatives.
Products are indexed as replacement parts unless explicitly marked otherwise. Always compare reference numbers and confirm fitment before purchase.
