Product Details
Product Overview
This high-precision 4W7020 Pencil Fuel Injector Nozzle is engineered for optimal performance in demanding diesel engine applications. Designed as a direct replacement for OEM components, it ensures reliable fuel atomization and combustion efficiency. We supply this critical part to a global network of distributors, engine rebuilders, and heavy equipment service centers across North America, Europe, the Middle East, and Asia-Pacific, facilitating fast and reliable engine repair worldwide.
Key Features & Benefits
- Precision Engineering: Manufactured to exacting tolerances for consistent fuel spray pattern and optimal engine performance.
- Durable Construction: Made from high-grade steel to withstand high-pressure common rail fuel systems and ensure long service life.
- Direct OEM Replacement: Designed as a plug-and-play component, ensuring perfect fitment and seamless integration without modification.
- Enhanced Combustion: Improves fuel atomization for more complete combustion, leading to better power output and reduced emissions.
- Reliable Supply: Available with neutral or WX packaging, suitable for global distribution and easy integration into your inventory system.
Technical Specifications
| Specification | Detail |
|---|---|
| Primary Part Number | 4W7020 |
| Alternative Part Number | 0R-8791 |
| Product Name | Pencil Fuel Injector Nozzle |
| Type | Common Rail Injector |
| Fuel Type | Diesel |
| Condition | New |
| Material | Steel |
| Application | Diesel Fuel Injection System |
| Packing | Neutral Packing / WX Packing |
| Single Package Dimensions | 25 x 5 x 5 cm |
| Single Gross Weight | 0.500 kg |
| Minimum Order Quantity (MOQ) | 6 pieces |
OEM Cross-Reference
This injector nozzle is a direct cross-reference for the following OEM part numbers:
- 4W7020
- 0R-8791
Always verify the part number stamped on your original component for confirmation.
Compatibility
This injector nozzle is designed for use in specific industrial and heavy equipment diesel engines. Primary applications include:
- Engine Models: CaterpillarĀ® 406C, 3412, and 3412C diesel engines.
- Application: Ideal for power generation units, industrial machinery, and heavy-duty equipment utilizing these engine platforms.
Note: Compatibility is based on part number interchange. Always confirm the engine model and existing part number before purchase.
Global Supply & Distribution
We are a specialist supplier to the global heavy equipment aftermarket. Our logistics network ensures efficient delivery to key industrial regions:
- Worldwide Shipping: We export to all major markets, including North America (USA, Canada, Mexico), Europe (UK, Germany, Netherlands), the Middle East (UAE, Saudi Arabia), and Asia-Pacific (Australia, Singapore).
- Fast Delivery to Hubs: Consolidated shipments to major ports and logistics centers in Rotterdam, Hamburg, Los Angeles, Houston, Dubai, and Singapore for rapid regional distribution.
- Export Compliance: All shipments are prepared with professional commercial invoices, packing lists, and comply with international trade regulations for a smooth customs clearance process.
Quality Assurance
- Manufacturing Standards: Produced in ISO-certified facilities using precision CNC machinery and rigorous quality control protocols.
- Performance Testing: Each injector undergoes functional testing to verify spray pattern, flow rate, and leak integrity before packaging.
- Warranty: Backed by a 4-month warranty from the date of shipment, covering defects in material and workmanship.
FAQ
Q: How do I confirm this injector nozzle is compatible with my specific engine?
A: The surest method is to match the part number. Locate the part number stamped on your existing injector nozzle (typically 4W7020 or 0R-8791) and cross-reference it with our listing. Also, verify your engine model (e.g., 3412C).
Q: Is this a single injector or a set?
A: This listing is for a single item (one injector nozzle). The Minimum Order Quantity (MOQ) is 6 pieces. This is standard for B2B transactions to ensure cost-effective shipping and inventory management for our partners.
Q: What packaging do you use for international shipping?
A> We offer neutral packaging (non-branded) or WX packaging, both designed to protect the component during transit. This is ideal for distributors and workshops who require parts without specific brand packaging. All shipments are securely packed in export-grade cartons.
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 .
FAQ
Common Product Inquiry Questions
How can I confirm this part matches my engine or injector model?
Send the OEM number, engine model, application, or clear product photos. We will help verify the suitable part before quotation.
Can I ask for packing, shipping, and delivery details together?
Yes. You can combine product confirmation, quantity, destination, packing request, and shipment method in one inquiry so the quotation is more complete.
Why is price not displayed on the page?
This catalog is built for B2B inquiry. Final pricing depends on the confirmed part number, quantity, stock situation, and shipping destination.
What information helps you quote faster?
Please include the OEM number, engine model, quantity, destination country, and any packing or shipping preference. This usually speeds up matching and quotation.
Inquiry Desk
Send Product Inquiry
Use this form to ask for fitment, MOQ, delivery time, packing, and shipping support for this product.
- Simple inquiry flow with direct sales follow-up.
- Send OEM number, quantity, or destination in the optional message if available.
- Every submission is stored in WordPress and sent to your admin email.
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Quick Inquiry
4W7020 0R-8791 Pencil Fuel Injector Nozzle | Common Rail Diesel | 406C 3412 Engine
Send one clear inquiry and we will reply with quotation, lead time, and fitment confirmation.
- OEM number is included automatically when available.
- Add quantity, destination, and packing needs for a faster quote.
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Inquiry Desk
Send Inquiry
Quick contact for this product. OEM number is attached automatically.
- Simple inquiry flow with direct sales follow-up.
- Send OEM number, quantity, or destination in the optional message if available.
- Every submission is stored in WordPress and sent to your admin email.