Product Overview

This high-performance 4W7037 Diesel Fuel Pencil Injector Nozzle is engineered as a direct replacement for 3400 Series diesel engines. Manufactured to exacting standards, this common rail injector ensures precise fuel delivery for optimal engine performance and efficiency. We specialize in global B2B supply, serving major markets across North America, Europe, Asia-Pacific, and the Middle East with reliable logistics and export compliance.

Key Features & Benefits

• Precision Engineering: Manufactured from high-grade steel for exceptional durability and resistance to high-pressure common rail systems.
• Optimal Fuel Atomization: Designed to deliver superior fuel spray patterns, promoting complete combustion, increased power, and reduced emissions.
• Direct OEM Replacement: Built to match original specifications for seamless integration, reliable performance, and easy installation.
• Enhanced Engine Longevity: Consistent fuel delivery helps prevent cylinder wash-down and carbon buildup, protecting critical engine components.
• Rigorous Quality Control: Each unit undergoes stringent testing to ensure leak-free operation and precise flow rates before shipment.

Technical Specifications

OEM Cross-Reference

This injector nozzle is a direct cross-reference for the following part numbers:

• 4W7037 (Primary OE Number)
• 127-8216 (Alternative/Cross Reference Number)

Note: Always verify part number compatibility with your specific engine serial number before purchase.

Compatibility

This Diesel Fuel Pencil Injector is designed specifically for applications utilizing the 3400 Series diesel engine. It is a critical component within the Common Rail Diesel Fuel Injection System. For precise fitment, please confirm your engine model and existing injector part number.

Global Supply & Distribution

We are a professional B2B supplier with extensive experience in the international automotive parts trade. Our streamlined supply chain ensures efficient delivery to key industrial hubs and ports worldwide.

• Worldwide Shipping: Reliable air and sea freight to all major continents.
• Key Markets Served: North America (USA, Canada, Mexico), Europe (UK, Germany, Poland), Asia-Pacific (Australia, Japan, Southeast Asia), Middle East, and South America.
• Fast Logistics: Consolidated shipments for cost-effectiveness and expedited delivery to major logistical centers.
• Trade Compliance: All documentation is prepared to meet international customs and import regulations.

Quality Assurance

Every injector is produced under strict manufacturing protocols to ensure reliability and performance parity with original components.

• Manufacturing Standard: Precision machining and assembly in ISO-certified facilities.
• Warranty: Backed by a 4-month warranty from the date of shipment, covering material and workmanship defects.
• Testing: Units are subjected to pressure tests, leak tests, and flow calibration checks to validate performance specifications.

FAQ

Q: Is this injector a direct fit for my 3406C engine?
A: This 4W7037 injector is designed for the 3400 Series engine family, which includes models like the 3406. However, always cross-reference your engine’s specific serial number and existing injector part number to confirm exact compatibility, as sub-models may have variations.

Q: What is included in the “Neutral/WX Packing”?
A> The injector is supplied in secure, unbranded packaging designed for optimal protection during shipping and storage. This is standard for B2B transactions, allowing for easy rebranding or direct integration into your inventory system.

Q: Do you provide technical support for installation?
A> Yes, we provide professional service and can supply basic installation guidelines. For complex installations, we recommend consultation with a certified diesel technician to ensure proper torque specifications, sealing, and system priming are followed to prevent damage.

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 .