Product Overview

This high-quality Diesel Injector Nozzle, model DN4PD57 (OEM 093400-5571), is a precision-engineered component designed for optimal fuel atomization in diesel truck engines. Manufactured from premium High-Speed Steel, this nozzle ensures reliable performance and long service life. We ship globally, serving major markets including North America, Europe, Southeast Asia, the Middle East, and South America, with fast delivery via DHL, TNT, UPS, EMS, and FEDEX.

Key Features & Benefits

• Precision Engineering: Manufactured to exact OEM specifications for perfect fit and function.
• Superior Material: Constructed from high-grade High-Speed Steel for exceptional wear resistance and durability.
• Optimal Fuel Economy: Precision-machined nozzle holes ensure fine fuel atomization, improving combustion efficiency.
• Reliable Performance: Rigorously tested to meet strict quality standards, ensuring consistent engine power and reduced emissions.
• Easy Installation: Direct replacement for original parts, saving time on maintenance and repairs.

Technical Specifications

OEM Cross-Reference

This nozzle is a direct replacement for the following OEM numbers:

• DN4PD57
• 093400-5571

Compatibility

This injector nozzle is specifically designed for diesel truck engines. While the “DN4PD57” designation is a common Bosch-style replacement, it is critical to verify fitment with your specific engine model and injector body. Common applications include various diesel-powered trucks and commercial vehicles. Always cross-reference with your original part number before purchase.

Global Supply & Distribution

We are a leading supplier of diesel engine components, offering worldwide shipping to meet the demands of international B2B buyers. Our logistics network ensures fast and reliable delivery to major ports and industrial centers across the globe, including:

• North America: Los Angeles, Houston, New York, Toronto
• Europe: Rotterdam, Hamburg, Antwerp, London
• Asia-Pacific: Singapore, Dubai, Shanghai, Sydney
• Middle East & Africa: Jebel Ali, Jeddah, Durban
• South America: Santos, Buenos Aires, Valparaiso

We offer flexible shipping options (DHL, TNT, UPS, EMS, FEDEX) and can accommodate both small orders and bulk container shipments. Our team has extensive export experience and ensures full compliance with international trade regulations.

Quality Assurance

Our diesel injector nozzles are manufactured under strict quality control procedures to ensure they meet or exceed OEM performance standards. Each part undergoes dimensional and functional testing before shipment. We stand behind our product with a 6-month warranty against manufacturing defects.

FAQ

Q: How can I confirm this nozzle (DN4PD57 / 093400-5571) fits my engine?
A: To ensure correct fitment, please compare the part number on your existing nozzle with our listing. The most reliable method is to remove your old nozzle and visually confirm the model number (DN4PD57) and the OEM number (093400-5571) are an exact match. If you are unsure, please contact us with your engine model and original part number for verification.

Q: What is the recommended installation procedure for this nozzle?
A: Installation should be performed by a qualified diesel technician. Key steps include: 1) Thoroughly clean the injector bore and seating surface. 2) Replace the nozzle retaining nut and copper washer with new ones (not included). 3) Tighten the nozzle retaining nut to the manufacturer’s specified torque setting. 4) Ensure the fuel system is bled of air before starting the engine. Incorrect installation can lead to poor performance or engine damage.

Q: What maintenance is required for this injector nozzle?
A: The lifespan of a diesel injector nozzle depends heavily on fuel quality and operating conditions. Using high-quality diesel fuel and regularly changing fuel filters are the best ways to extend nozzle life. If you experience symptoms like rough idling, black smoke, decreased power, or increased fuel consumption, the nozzle should be inspected and tested by a professional. We recommend replacing nozzles in sets to ensure balanced engine performance.