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.

Our advantages

1.An authorized wholesaler of Isuzu genuine parts, Hino genuine parts, Mitsubishi genuine parts and Mahle parts.

2. We are not only supply genuine parts, but also high quality OEM parts, which are made in China or made in Japan.

3. More than 10 years of experience in machinery parts, professional supply of diesel engine parts.

4. Fast delivery, the fastest can be shipped in one day ,more than 500,000 of different types parts in stock.

5. Scientific ERP system, easy and fast to locate the parts that customer needs.

6. Professional technician checks the parts before delivery, to make sure the parts are correct, usable and defect-free.

Exhibition

Packing&Shipping

1.  Our shipment is by air/sea/express (DHL/FEDEX/TNT/UPS/EMS).

2.  Once we get confirmation of payment, we will ship products in 2 days.

3.  Our packaging is standard export wooden box or others as your requirement.

4. We’ll check and test the products before shipping , and givethe pictures to our customers to confirm.

FAQ

Q1. What is your company major products?

A: Our main products are Liner kit, Piston, Rings, Liner, Gasket kit, Bearing, Injection pump, Nozzle, Water pump, Oil pump,Crankshaft, Turbocharger,Filter, etc.

Q2.What is the MOQ?

A: Normally we can supply any quantity if we have in stock.

Q3. What is your payment term ?

A: We accept Western Union, T/T, Paypal.

Q4. What is the packing ?

A: Carton or wooden case , If you want to put your logo on the packing , We will do it after get your authorization letter.

Q5. When can you deliver products after payment ?

A: By Express ,usually might take 3-4 days ;By Air , Usually take 7-9 days ; By Sea ,usually take 1-2 months .

Q6. What can you do to complete order perfectly ?

A: In the beginning , We will communicate with clients in details to understand what they need .

Before packing , We will check the products and send photos to clients .After confirmation ,

We will packing products well to avoid damage . Once we get tracking number ,

We will send it to customer and keep contact in with clients .