Product Overview

This high-quality common rail diesel fuel injector, referencing OEM numbers 0445120029 and 3965721, is a direct replacement designed for a range of Cummins diesel engines. Manufactured to precise tolerances in Shandong, China, this injector ensures optimal fuel atomization and engine performance. We serve a global B2B client base, with extensive export experience to major markets including North America, Europe, Southeast Asia, the Middle East, and Africa. This component is ideal for fleet maintenance, repair shops, and wholesale distributors requiring reliable, cost-effective fuel system parts.

Key Features & Benefits

• Precision Engineering: Manufactured from high-grade steel to exacting OEM specifications for a perfect fit and reliable sealing.
• Enhanced Performance: Optimized for common rail systems to deliver precise fuel injection timing and volume, improving engine efficiency and reducing emissions.
• Durability & Longevity: Designed to withstand high injection pressures and harsh operating conditions, ensuring a long service life in heavy-duty applications.
• Rigorous Testing: Each injector undergoes pressure and spray pattern testing before shipment to guarantee consistent, trouble-free operation.
• Direct Replacement: A true “drop-in” replacement part, simplifying installation and minimizing vehicle downtime.

Technical Specifications

OEM Cross-Reference

This injector is a direct replacement for the following original equipment manufacturer (OEM) part numbers:

• 0445120029 (Bosch)
• 3965721 (Cummins)

Note: This is a high-quality aftermarket replacement part, not an original OEM part.

Compatibility

This fuel injector is designed for use in various Cummins diesel engines equipped with Bosch common rail fuel systems. Common applications include:

• Cummins ISB, ISBe, and QSB series engines (4-cylinder and 6-cylinder variants).
• Medium-duty trucks, buses, and agricultural equipment.
• Industrial and generator set applications using compatible Cummins platforms.

Please verify your engine model and injector code before purchasing to ensure correct fitment.

Global Supply & Distribution

We offer comprehensive global supply chain solutions for international B2B buyers:

• Worldwide Shipping: Reliable shipping via sea, air, and express courier (DHL, FedEx, UPS) to any destination.
• Major Markets Served: North America (USA, Canada, Mexico), Europe (Germany, UK, Netherlands), Asia-Pacific (Australia, Japan, Korea), Middle East (UAE, Saudi Arabia), and Africa (South Africa, Nigeria).
• Fast Delivery: Efficient logistics network ensures quick delivery to major ports (Shanghai, Qingdao, Ningbo) and industrial centers.
• Export Experience: Proven track record in international trade, with proper documentation and customs clearance support.

Quality Assurance

• Manufacturing Standards: Produced in ISO-certified facilities with strict quality control processes.
• Testing: Each injector is individually tested for spray pattern, opening pressure, and leak tightness.
• Warranty: Backed by a 4-month warranty against manufacturing defects. We stand behind the reliability of our products.

FAQ

Q1: Is this injector compatible with my 2008 Cummins ISB 6.7L engine?
A1: This injector (0445120029/3965721) is commonly used in various Cummins ISB and QSB series engines. While it fits many 6.7L and 5.9L applications, we strongly recommend checking your current injector’s part number and engine serial number to confirm compatibility, as fuel system configurations can vary by year and horsepower rating.

Q2: Do I need to replace the fuel injector hold-down bolt and copper washer?
A2: Yes, it is highly recommended to replace the injector hold-down bolt, copper washer, and any sealing O-rings with new ones during installation. These are single-use components that must be torqued to the manufacturer’s specification to ensure proper sealing and prevent fuel leaks or injector failure.

Q3: What maintenance is required after installing a new fuel injector?
A3: After installation, it is critical to prime the fuel system to remove any air before starting the engine. We also recommend using a high-quality fuel filter and ensuring the fuel rail pressure is within the engine’s specified parameters. For optimal injector life, use clean, high-quality diesel fuel and perform regular fuel system maintenance as outlined in your engine’s service manual.

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 .