Product Overview

This is a high-precision, new replacement fuel injector plunger designed for Zexel diesel injection systems. Engineered for durability and exact fitment, this critical component is essential for maintaining optimal fuel pressure and spray pattern in heavy-duty diesel engines. We supply this part globally to major markets including North America, Europe, Asia-Pacific, and the Middle East, supporting the maintenance and repair needs of construction, mining, and industrial sectors worldwide.

Key Features & Benefits

• Premium High-Speed Steel Construction: Manufactured from wear-resistant high-speed steel for exceptional durability and a long service life under high-pressure conditions.
• Precision Engineering: Produced to exact OEM specifications to ensure perfect fitment, reliable sealing, and consistent fuel delivery.
• 100% Professional Testing: Each plunger undergoes rigorous quality control and performance testing to guarantee it meets or exceeds original equipment standards.
• Universal Fitment Design: Engineered as a direct replacement for multiple Zexel plunger models, simplifying inventory and ensuring broad compatibility.
• Enhanced Engine Performance: Restores precise fuel metering, improves combustion efficiency, and helps reduce emissions and fuel consumption.

Technical Specifications

OEM Cross-Reference

This injector plunger is a direct replacement for the following OEM and aftermarket part numbers:

• Zexel (Bosch): 140163-5320, 1401635320
• Common Aftermarket References: K3341, K342, K344, K345

Always verify the specific plunger model (K3341, K342, K344, or K345) required for your exact injector assembly before ordering.

Compatibility

This plunger is designed for use in Zexel (also known as Bosch Diesel Systems) fuel injection pumps and unit injectors. It is commonly found in a wide range of heavy-duty diesel engines powering:

• Excavators and Construction Machinery
• Mining Equipment
• Industrial Generators and Pumps
• Commercial Trucks and Buses

Note: Compatibility is determined by the injector/pump model, not the vehicle make. Always cross-reference the original part number (140163-5320) or the specific plunger model from your disassembled unit.

Global Supply & Distribution

We are a leading supplier of diesel engine components with extensive experience in international B2B trade. Our logistics network ensures reliable delivery to key industrial regions globally.

• Worldwide Shipping: We export to all major markets, including North America (USA, Canada, Mexico), Europe (UK, Germany, Poland), Asia-Pacific (Australia, Japan, Singapore), and the Middle East (UAE, Saudi Arabia).
• Fast Delivery to Major Hubs: Efficient shipping to major ports and logistics centers such as Rotterdam, Los Angeles, Singapore, and Jebel Ali.
• Export Compliance: All shipments are prepared with complete and accurate commercial documentation (invoice, packing list, certificate of origin) to ensure smooth customs clearance.
• Bulk & Wholesale Support: We specialize in supplying distributors, workshops, and fleet operators with volume orders, offering competitive landed costs.

Quality Assurance

We stand behind the quality and performance of every part we supply.

• Manufacturing Standards: Components are manufactured in ISO-certified facilities using precision CNC machinery and strict quality control protocols.
• Comprehensive Warranty: Backed by an 8-month warranty from the date of purchase, covering defects in material and workmanship.
• Testing Procedures: Each plunger is subjected to dimensional inspection, surface finish analysis, and material hardness testing to ensure it meets the required specifications for pressure tolerance and wear resistance.

FAQ

Q: How do I confirm this plunger is the correct part for my injector?
A: The most reliable method is to match the part number stamped on your original plunger. This part directly replaces OEM number 140163-5320 and its variants (K3341, K342, K344, K345). If the original number is illegible, identify the exact Zexel injector model your engine uses.

Q: What is the typical installation process for a fuel injector plunger?
A: Installation requires specialized tools and knowledge. The injector pump or unit injector must be disassembled in an ultra-clean environment. The old plunger and barrel are replaced as a matched set to maintain precise clearance. We recommend installation by a qualified diesel fuel injection technician.

Q: What are the signs that my injector plunger needs replacement?
A: Common symptoms include hard starting, loss of engine power, excessive black or white smoke, uneven engine idle, and increased fuel consumption. These issues often point to worn plungers that can no longer maintain the required fuel pressure for proper atomization.

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 .