4120L-10M/10MB is a highly efficient, large-capacity spin-on diesel fine filter (also known as a secondary filter). Its core function is to remove extremely fine particulate impurities and moisture from diesel fuel, providing the highest level of protection for high-pressure common rail fuel injection systems (such as those in electronically controlled engines). It is a critical component for ensuring the smooth operation and extending the service life of modern diesel engines.
Item No :
4120L-10M, 4120L-10MBPayment :
T/T, Cash, AlipayProduct Origin :
chinaColor :
CustomizedShipping Port :
Ningbo Port, Shanghai PortPrice :
11.27 USDDescription:
Fine Filtration: Utilizing high-performance filter media, it effectively filters out tiny particles in diesel fuel with diameters of only 2-10 micrometers.
Efficient Water Separation: A special coating on the filter media coalesces tiny water droplets in the diesel fuel into larger droplets. These larger droplets separate from the diesel fuel under gravity and settle at the bottom of the filter. The large water storage capacity extends maintenance intervals. It directly protects high-value, high-precision components such as the high-pressure fuel pump, common rail, and injectors, preventing costly repairs caused by contamination.
Parameter:
| Product Name | 4120L-10M Fuel Filter 4120L-10MB |
| Diameter | 113.7 mm ; 112mm |
| Height | 369.5 mm ; 348.8mm |
| Thread size | 1-14 UNF ; 1-12 UNF |
| Weight | 2100g; 1710g |
| Applicable models | Volkswagen |
| Price | 11.27 USD |
Features:

High Filtration Efficiency – Effectively separating most free water and emulsified water from diesel fuel, thereby protecting downstream precision components from corrosion and damage.
Sensor interface –The bottom of the filter is usually designed with a water level sensor interface.
Integrated spin-on design – Allows for manual disassembly and assembly without tools, making replacement quick and easy, ensuring reliable sealing and preventing oil leaks.
Strong pressure resistance – The casing is robust and can withstand pressure fluctuations and vibrations in the fuel system.
Applications:
Our Service
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| OEM Support: Custom product and packaging options available. | Sample Orders: We welcome sample orders for testing. | Quick Response: We respond to inquiries within 24 hours. |
Payment Options: T/T, PayPal, Alipay.
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Sample Delivery: 3-15 days.
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Order Delivery: 20-30 working days, depending on quantity. |
Shipping: Available by sea, air, or express.
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Test the products upon receipt and contact us if there are any issues. |

Frequently Asked Questions
Question: How is the quality of your products?
A. Our advanced machinery and materials guarantee outstanding performance and craftsmanship.
B. Customized materials and standards can be provided to meet specific market demands.
Question: What is the payment method?
Letter of Credit, Telegraphic Transfer, Documents against Payment, PayPal, Western Union Money Transfer, Small Payment, MoneyGram.
Question: Do you offer samples?
Yes, samples can be provided (either free of charge or at a fee, depending on the product); the shipping cost is borne by the buyer.
Question: What packaging options are available?
A. Customized Packaging
B. White or natural packaging
C. Color Box Options
Question: How long is the delivery time?
A. Generally, it takes 15 to 30 days.
B. Spot goods: Shipment will be made within 7 days after payment.
Question: What are the loading ports?
Guangzhou Port, Ningbo Port and Shanghai Port.
Question: What are the transportation methods?
A. Oceans, skies and land.
B. In cases where there are multiple sources of supply in China, we can assist in coordinating with the freight forwarders to integrate your goods transportation.
Question: Could we visit your factory?
A. Sure, our factory is located in Wenzhou City, Zhejiang Province, China.
Our hours
Mon 11/21 - Wed 11/23: 9 AM - 8 PM
Thu 11/24: closed - Happy Thanksgiving!
Fri 11/25: 8 AM - 10 PM
Sat 11/26 - Sun 11/27: 10 AM - 9 PM
(all hours are Eastern Time)