Weichai National V Injector Assembly 0445120391 / 612630090055
Weichai National V Injector Assembly 0445120391 / 612630090055
Weichai National V Fuel Injector Assembly — OEM 0445120391 / 612630090055
Keep your Weichai National V diesel engine running at peak performance with this precision-engineered direct-replacement fuel injector assembly. Manufactured to exacting OEM specifications, this stainless steel injector delivers accurate, consistent fuel atomization for smooth engine operation and optimal fuel efficiency.
Key Features
- Direct Drop-In Replacement: Designed specifically for Weichai National V engines — no modifications required for installation.
- OEM Reference Numbers: 0445120391 & 612630090055 — always verify your OE number before purchasing.
- 100% Factory Tested: Every unit is fully tested at the factory and must pass stringent quality checks before shipping.
- Precision Stainless Steel Construction: High-grade stainless steel components for long-lasting durability and corrosion resistance.
- Plug & Play Installation: Ready to install straight out of the box — no special tools or calibration equipment needed.
- Neutral Carton Packaging: Securely packed in an independent neutral carton to protect the injector during transit.
Specifications
| Compatible Engine Series | Weichai National V |
| OEM Part Number | 0445120391 |
| Cross Reference Number | 612630090055 |
| Material | Stainless Steel |
| Installation Method | Direct Replacement |
| Condition | Brand New or High-Quality Remanufactured |
| Country of Origin | Made in Mainland China |
Important Installation Notes
- Verify Your OE Number First: Confirm the OEM number (0445120391) matches the part you intend to replace before ordering to avoid fitment issues.
- Compare Product Photos: Review all product images carefully to confirm this is the correct injector for your application.
- Handle Sealing Rings with Care: During installation, take care not to damage the sealing ring to ensure a leak-free fit.
- Returns Policy: Returns are accepted only if the item is in resalable, undamaged condition and in its original packaging. Units damaged due to installation errors or incorrect part selection are not eligible for return.
Our Service Guarantee
We are committed to 100% customer satisfaction. If you have any questions about fitment, installation, or your order, please contact us — our team is ready to assist you promptly.
For more information on diesel fuel system standards and maintenance best practices, visit the U.S. EPA Emission Standards Reference Guide for Heavy-Duty Engines.
Frequently Asked Questions
Q: How do I confirm this Weichai fuel injector assembly (0445120391) fits my engine?
A: Cross-reference the OEM part number 0445120391 or 612630090055 with your existing injector or your vehicle's service manual. If you need help verifying fitment for your specific Weichai National V engine, please contact us before placing your order.
Q: Is this fuel injector assembly brand new or remanufactured?
A: This injector assembly is either brand new or high-quality remanufactured — as shown in the product images. Regardless of which you receive, every unit undergoes 100% factory testing to ensure it meets OEM performance standards before shipping.
Q: What is included in the package?
A: The package includes only the fuel injector assembly (OEM 0445120391 / 612630090055) in an independent neutral carton. No other components, tools, or accessories are included.
Q: Can I install this injector myself, or do I need a professional mechanic?
A: This injector is designed as a direct plug-and-play replacement, making installation straightforward. However, if you are not experienced with diesel fuel system components, we recommend having the installation performed by a qualified diesel mechanic to ensure proper seating and sealing ring integrity.