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Cummins B6.7, L9 DPF 2018-2022: OEM 5579371

CUMMINS B6.7, L9 DPF 2018-2022: OEM 5579371

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$1,595.00

CORE CHARGE:

$250.00
iCORE DISCLAIMER: The CORE charge is a 30 day hold and will not be processed as long as the CORE is returned within 30 days. If you do not have a CORE or fail to return the CORE within 30 days, the CORE charge hold amount will be processed at that time.

AVAILABILITY IN STOCK
OEM NUMBER5579371
PART TYPEDPF
BRANDSkyline
ENGINE MAKECummins
ENGINE TYPEB6.7, L9
YEAR2018-2022
PART NUMBERBJ0710-C
APPLICATION NOTESEPA17
ADDITIONAL NOTES2x of CL068,2x of GA068

PRODUCT DESCRIPTION

This is a New, Skyline DPF, Skyline part number BJ0710-C ( OEM Part Number 5579371 ).This part is primarily made for a Cummins B6.7, L9, production years 2018-2022, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

Additional Notes: 2x of CL068,2x of GA068

OEM NUMBERS

Primary OEM5579371
Additional OEM2064075X, 2064075XS, 4394579, 4394579NX, 4394579RX, 5579360RX, 5579371, 5579371RX, A055B959, A064B961

ADDITIONAL DETAILS

CONDITIONNew
UPC / Barcode00840490542679
WEIGHT45.75 LBS

SHIPPING OPTIONS

Ship Weight : 45.75 LBS
UPS Ground, 2nd Day Air, Next Day Air

SHIPPING POLICY

Tamerx Diesel Products ships via UPS Ground. Next day air shipping can be arranged for a reasonable price of anywhere from $50.00 - $100.00 depending on the weight of the product and your location. We will do everything we can to make sure that you get the service you need. We understand how important it is to receive your order as quickly as possible.
In most cases Tamerx Diesel Products only needs one address, as long as your product is shipping to the same location as your billing information. In order to eliminate credit card fraud, your billing information must match the credit card you provide.

The terms, conditions, and details of our warranty vary from product to product. Specific warranty details can be found below.

Tamerx Diesel Products provides a replacement warranty on all of our parts. The duration and mileage limitations of the warranty vary by product and are specified on the product's detail page/item listing.

Please note that the warranty covers replacement of the part and the cost of shipping the replacement part to you only. It does not cover any shop, labor, towing, or any similar or related costs. This is not a "money back guarantee".

If you experience a problem with your part or it is not functioning properly, the correct warranty procedure is to call us at (510) 257-1777 (8:00 AM - 5:00 PM ET Monday through Friday). Be sure to have your order number and/or other relevant order information ready so we can easily locate your order and resolve your issue as quickly as possible. From that point, we will review with you any troubleshooting steps that may need to be taken and other areas or systems that can be checked to rule out external problems contributing to your part's issue. If a replacement is determined to be necessary, we will then arrange for your replacement part to ship out ASAP and issue any necessary return shipping labels and/or documents.

As is the case for the majority of the diesel products sold on Tamerx Diesel Products, your part's warranty is active as soon as you install it. In some other cases, warranty activation is contingent upon you sending us your core (i.e., your old part). Tamerx Diesel Products will provide you a return shipping label for parts that have a warranty with a core return condition. When we have received your core return, the part's warranty coverage begins. We reserve the right to void the product warranty if your core is not received within the allotted time, or if it isn't received at all. If the warranty for the diesel part you are purchasing has a core return requirement, it will be clearly noted on the product detail page/item listing.

What is a Core Charge?

A core charge (also called "core deposit") is similar to the deposit you might pay for a can or bottle of soda and is a standard requirement in the auto parts industry. For example, in many states, to promote recycling, you pay a deposit when you purchase a can of soda and receive your deposit back when you return the empty can. Many automotive parts have a core charge, or core price, that works in essentially the same way as a soda can deposit.

30 Day Core Charge Hold

You authorize Tamerx Diesel Products, to hold your credit card for the specified core charge amount and that you agree to return your core with 30 days of receiving the purchased part. When we have received your core return, the hold is released and the core charge payment is canceled.

The customer, or parts buyer, is responsible for any shipping costs associated with core returns unless otherwise specified in the product listing/detail page. Tamerx Diesel Products offers prepaid UPS shipping labels (SKU numbers UPS-CR1 and UPS-CR2) for use in returning your core that are available for purchase on our website during your shopping/order process.

The shipping label you will need to use for the core return is dependent upon what part you are purchasing. UPS-CR1 is good for cores weighing up to 20 pounds. UPS-CR2 is appropriate for shipping cores weighing 21 pounds or more. You must include enough information with the core return that clearly identifies it as a.) a Core Return, and b.) contains enough information we can use to clearly associate the core return with your order. Including a copy of the invoice or packing slip that came with the original shipment, clearly marked "Core Return", is ideal. Alternately, you can include a note marked as "Core Return" that includes your order number, full name and address, and phone number or other contact information. Failure to include this information with your returned core will most likely delay any due core credit being issued and/or delay any applicable warranty activation. Core returns need to be for the exact part purchased and cannot be damaged. Substituting another part in place of the part you have purchased is not acceptable.

All fluids must be drained.

If you have purchased a set or a parts package, you will need to return cores for all components of the set. For example, if you have purchaed a high pressure oil pump with an IPR valve, you will need to return both HPOP and IPR valve cores to receive proper credit. If you have purchased an EGR cooler/EGR valve package, your core return must consist of an EGR cooler core and an EGR valve core, or core credit will not be given.

Core Charges are often mandated by state legislature, and, as such, the actual core charge and taxes on the charge may vary depending on the state in which you buy your part. The Tamerx Diesel Products core charge presented to you online today with your item is representative of the most common core charge.


The Cummins B6.7, L9 DPF OEM 5579371 is a genuine Diesel Particulate Filter designed to effectively capture and remove soot from the exhaust stream in engines manufactured between 2018 and 2022. Built to Cummins factory specifications, this OEM component ensures precise fitment, optimal filtration efficiency, and dependable emissions control. By maintaining proper exhaust flow and supporting regeneration cycles, it helps engines meet emissions compliance while preserving performance and fuel economy. Its durable construction is engineered to withstand high heat and demanding operating conditions, offering long service life and consistent reliability. For fleets and technicians, this DPF delivers OEM-certified quality and trusted performance to keep Cummins-powered equipment running clean and efficient.

FITMENT CHART

YEARMAKEENGINE(S)
2018Cummins B6.7 L9
2019Cummins B6.7 L9
2020Cummins B6.7 L9
2021Cummins B6.7 L9
2022Cummins B6.7 L9

PEOPLE ALSO ASKS | BLOG(S)

The Diesel Particulate Filter (DPF) with part number 5579371 is a core component in the aftertreatment system of Cummins B6.7 and L9 engines (2018–2022). Its main function is to trap and reduce particulate matter (soot) from the exhaust before it exits the tailpipe.

Core Responsibilities

  • Soot Capture & Filtration
    • As exhaust gases pass through the DPF, the filter substrate captures soot particles and holds them, preventing them from entering the atmosphere.
  • Soot Accumulation & Storage
    • The DPF accumulates soot during normal engine operation. Over time, it stores this particulate until a regeneration event is triggered.
  • Regeneration / Soot Burn-off
    • At appropriate intervals, the engine control system initiates regeneration, heating the DPF to burn off the stored soot, converting it to ash and carbon dioxide. This restores the filter’s capacity to trap more soot.
  • Backpressure Management
    • The DPF must balance filtering capability with exhaust flow. It’s designed to maintain acceptable backpressure so the engine does not suffer from too much restriction.
  • Emission Compliance Support
    • By capturing and eliminating soot, the DPF helps the engine meet strict environmental emissions standards for particulate matter.

The OEM 5579371 DPF acts as the “soot trap” in the Cummins B6.7 / L9 aftertreatment system. It filters, stores, and periodically regenerates to keep emissions in check, while supporting engine performance and regulatory compliance.

The Diesel Particulate Filter (DPF) plays a vital role in reducing emissions by trapping soot and exhaust particulates before they leave the tailpipe. While DPFs are designed to last for many years, they can fail much sooner if certain conditions are ignored. Understanding the causes of premature DPF failure can help prevent costly repairs and extended downtime.

Common Causes of Premature DPF Failure

  • Poor Maintenance
    • Neglecting regular service is the leading cause of DPF issues. When filters, sensors, and fluid systems aren’t inspected routinely, soot buildup accelerates — reducing the DPF’s ability to regenerate properly.
  • Faulty or Contaminated Injectors
    • Leaking or inefficient injectors can cause incomplete combustion, leading to excessive soot production. This overloads the DPF faster than it can burn off, clogging it prematurely.
  • Short Driving Cycles
    • Frequent short trips or long idle times prevent the DPF from reaching the temperature needed for regeneration — the self-cleaning process that burns away trapped soot. Over time, the filter becomes blocked and fails.
  • DEF System Problems
    • A malfunctioning DEF (Diesel Exhaust Fluid) system can disrupt exhaust chemistry and prevent proper regeneration. Faulty sensors, poor-quality DEF, or contamination can all contribute to early DPF failure.
  • Engine Oil or Coolant Contamination
    • If oil or coolant enters the exhaust stream due to worn seals or gaskets, it coats the DPF with residue that cannot be burned off, forcing replacement.
  • Low-Quality Fuel
    • Using low-grade or contaminated diesel increases soot levels and adds impurities that clog the DPF faster than normal.

How to Prevent Premature DPF Failure

  • Follow the manufacturer’s maintenance schedule for filter cleaning or replacement.
  • Use high-quality fuel and DEF fluid that meet OEM standards.
  • Allow the engine to complete regeneration cycles fully.
  • Regularly inspect injectors, EGR valves, and sensors for proper operation.
  • Address warning lights immediately — ignoring them often leads to complete DPF blockage.

A DPF typically fails prematurely due to poor maintenance, excessive soot buildup, or system contamination. The best way to prevent failure is through regular inspection, high-quality fluids, and allowing proper regeneration. With consistent care, your DPF can perform reliably for hundreds of thousands of miles.

Loss of power, high exhaust backpressure, or frequent regeneration cycles often indicate a clogged filter.

Yes, a restricted or failed DPF can trigger the ECM to limit power to protect the engine and emission system.

Cleaning or replacement intervals depend on operating conditions but are typically every 200,000 to 400,000 miles.

Yes, if structurally sound, it can be professionally cleaned to restore flow and efficiency.

Cummins DPFs

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