Product Overview

This high-quality common rail fuel injector, model 0445120070 (cross-reference 3976631), is specifically engineered for the Cummins ISB engine series. As a critical component of the diesel fuel injection system, this injector ensures precise fuel delivery, optimal combustion, and enhanced engine performance. We are a leading supplier based in Shandong, China, serving a global B2B clientele with reliable shipping to major industrial hubs across North America, Europe, Asia-Pacific, the Middle East, and South America.

Key Features & Benefits

• Precision Engineering: Manufactured to meet or exceed OEM specifications for exact fit and seamless replacement.
• Superior Durability: Constructed from high-grade steel to withstand extreme pressure and temperature conditions within the common rail system.
• Enhanced Fuel Efficiency: Optimized spray pattern and atomization contribute to complete combustion, reducing fuel consumption and emissions.
• Reliable Performance: Rigorously tested for consistent flow rate and pressure tolerance, ensuring stable engine idling and maximum power output.
• Direct Replacement: A universal fit for the ISB series, designed for easy installation without modifications.

Technical Specifications

OEM Cross-Reference

This injector is a direct replacement for the following OEM and reference numbers:

• Bosch Number: 0445120070
• Cummins Number: 3976631
• Alternative Reference: 3976631RX (Remanufactured equivalent)

Compatibility

Engine Models:

• Cummins ISB (4.5L, 5.9L, 6.7L variants)
• Cummins B-Series (common rail versions)

Vehicle Applications:

• Dodge Ram 2500/3500 (2007-2012 with 6.7L Cummins)
• Freightliner M2 Business Class
• International DuraStar
• Various agricultural, industrial, and marine equipment using ISB engines

Global Supply & Distribution

We offer comprehensive logistics solutions to ensure your order arrives on time, anywhere in the world. Our supply chain covers:

• North America: Fast shipping to ports like Los Angeles, Houston, and New York.
• Europe: Direct delivery to Rotterdam, Hamburg, and Felixstowe.
• Asia-Pacific: Expedited service to Singapore, Shanghai, and Sydney.
• Middle East & Africa: Reliable routes to Dubai, Jebel Ali, and Durban.
• South America: Efficient logistics to Santos and Callao.

With our export experience, we handle all customs documentation and compliance, offering competitive freight rates for both FOB and CIF terms.

Quality Assurance

• Manufacturing Standards: Produced in ISO 9001 certified facilities.
• Testing: Each injector undergoes 100% flow bench testing for pressure, spray pattern, and leak-proof performance.
• Warranty: Backed by a 4-month warranty against manufacturing defects.
• Packaging: Secure, neutral packaging to prevent damage during transit.

FAQ

Q1: Is this injector a direct replacement for the Cummins 3976631 part?
Yes, this injector (0445120070) is a direct OEM replacement for the Cummins part number 3976631. It is designed to fit seamlessly into the common rail fuel system of the ISB engine without any modifications required.

Q2: What is the recommended installation procedure for this injector?
Installation should be performed by a certified diesel technician. Key steps include: cleaning the injector bore, replacing the copper washer and O-rings, torquing the injector clamp to manufacturer specifications (typically 18-22 Nm), and priming the fuel system to remove air before starting the engine. Do not mix injectors from different cylinders without calibration.

Q3: How can I ensure the long-term performance of this injector?
To maximize lifespan, use high-quality diesel fuel with proper cetane rating and keep the fuel system clean. Regularly replace fuel filters (every 15,000-20,000 miles or as per OEM schedule) to prevent contaminants from damaging the injector’s internal components. Avoid running the engine on low fuel, which can introduce air into the system.