Bosch Reman Common Rail Injector for Cummins QSB 4.5L, 5.9L & 6.7L Engines

This is the Bosch OE remanufactured common rail injector 0986435597 — the factory-reman version of new Bosch injector 0445120231 (Cummins 5263262, Komatsu 6754-11-3011; also supersedes 0445120059). It fits a wide range of Cummins QSB engines used in industrial, construction, agricultural, and marine applications. Engineered to meet or exceed OEM specifications, each injector is fully tested on Bosch-certified equipment to ensure precise fuel delivery and long-term durability under demanding conditions.

This listing is for the remanufactured injector at reman pricing. Brand-new Bosch units (0445120231) are also available at a higher price — call us for new-unit pricing.

Included in the Box:

• (1) Reman CR Injector
• (1) Copper Nozzle Tip Chamber Gasket / Washer
• (1) Injector Sealing O‑ring

Features and Benefits:

• 100% end‑of‑line tested using official OE Bosch test equipment and specifications for guaranteed performance
• Manufactured with the latest Bosch engineering updates, often superior to the original unit being replaced
• Built using genuine OE tools and processes, ensuring factory-level quality and fit
• All wearable and critical internal parts replaced with genuine Bosch components during remanufacturing

Fitment:

• Cummins QSB 4.5L engines
• Cummins QSB 5.9L engines
• Cummins QSB 6.7L engines
• Industrial, agricultural, construction, and marine applications (incl. Komatsu)

Important: Please provide your engine serial number (ESN) to verify this is the correct injector for your application before ordering.

Part Numbers — Reman P/N 0986435597 (replaces the following):

Warranty:

12‑month, unlimited‑mileage warranty covering manufacturing defects in material or craftsmanship, when core is returned per policies.

Need Help With Fitment?

Call 530-668-0818 with your engine serial number to verify the correct injector for your application before ordering.