Buy 5303101PX - Genuine Cummins Fuel Injector Set ISB/QSB 6.7L - wisentpartscenter.com

Description

The Genuine Cummins Fuel Injector Set contains six Bosch high-pressure common rail injectors for Cummins ISB/QSB 6.7L diesel engines. These electronically controlled injectors deliver precisely metered fuel into each cylinder to maintain efficient combustion, smooth engine operation, and consistent power delivery. The Bosch injector family is also used in select industrial and marine Cummins QSB applications.

Fitment & Specifications

- Brand: Cummins / Bosch
- Part Type: Common Rail Fuel Injector Set
- Engine: Cummins ISB/QSB 6.7L
- Documented Application: QSB6.7, including select marine engines
- Fuel System: Bosch High-Pressure Common Rail (HPCR)
- Injector Type: Electronically controlled solenoid
- Quantity: 6 fuel injectors

Verify fitment with us before ordering to ensure the correct part for your application.

Purpose of the Part

The Cummins Fuel Injector Set delivers high-pressure diesel fuel to all six engine cylinders. Each injector uses electronic control to regulate injection timing and fuel quantity. Precision nozzles atomize the fuel for efficient combustion, supporting reliable starting, smooth idle, engine power, and fuel efficiency.

Issue Symptoms / When to Replace

Worn or malfunctioning fuel injectors may cause:

- Hard starting or extended cranking.
- Rough idle or engine misfires.
- Reduced power or poor acceleration.
- Excessive black or white exhaust smoke.
- Increased fuel consumption.
- Abnormal diesel knock.
- Excessive injector return flow or low fuel rail pressure.

Similar symptoms can result from fuel contamination, leaking injector connectors, fuel supply restrictions, or high-pressure pump problems.

Brand Information

Cummins manufactures diesel engines and power systems for commercial, industrial, and marine applications. Bosch develops high-pressure common rail injection systems and manufactures the injector identified by Bosch number 0445120356 for Cummins applications.

Installation Notes

Maintain strict fuel-system cleanliness during installation. Inspect injector feed tubes and replace required sealing components. Follow Cummins injector installation and tightening procedures, complete any applicable injector coding, and check for fuel leaks after installation.

How to Identify an OEM Part

Identify the Genuine Cummins fuel injectors by the Bosch logo and manufacturer part number on the injector bodies. The documented Bosch number is 0445120356 (0 445 120 356), corresponding to Cummins 5303101. Compare the markings on all six injectors and verify the original packaging.

Why Buy 5303101PX From Wisent Parts Center?

  • 1 Year
    Warranty

  • Genuine Parts

    Authentic OEM parts

  • 30-Day Returns

    Conditions apply

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Warranty & Return Information
Warranty Information

Wisent Parts offers a 1-year warranty on all parts from the date of delivery. This warranty covers orders placed directly through our website. If a part fails during this period, we’re here to help - whether it’s a replacement, repair, or refund. For full details, refer to the Warranty page.

Return Information

Wisent Parts accepts returns within 30 days of delivery. All returns are subject to a restocking fee. To qualify, parts must be unused and in their original condition. For full return instructions and restocking fee details, please refer to the Returns page.