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Cummins B6.7, L9 SCR 2018-2024: OEM 5418488

CUMMINS B6.7, L9 SCR 2018-2024: OEM 5418488

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$4,995.00

AVAILABILITY IN STOCK
OEM NUMBER5418488
PART TYPESCR
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEB6.7, L9
YEAR2018-2024
PART NUMBER5418488RM-SCR-2
APPLICATION NOTESNavistar, 200-320, EPA17

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx SCR, Tamerx part number 5418488RM-SCR-2 ( OEM Part Number 5418488 ). All parts are proudly remanufactured in the U.S.A. to the highest of OEM standards, and improvements are often applied to the original design in the remanufacturing process. This part is primarily made for a Cummins B6.7, L9, production years 2018-2024, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM5418488
Additional OEM5418488

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490552340
WEIGHT75.00 LBS

SHIPPING OPTIONS

Ship Weight : 75.00 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.


Serving 2018–2024 Cummins B6.7 and L9 diesel platforms, the SCR unit with OEM 5418488 is a vital part of the exhaust aftertreatment system. This selective catalytic reduction module is engineered to match factory exhaust configurations and emissions sensor locations specific to both B6.7 and L9 engines. Its role is to work with diesel exhaust fluid (DEF) to reduce nitrogen oxide (NOₓ) levels in the exhaust stream, helping support compliance with applicable emissions standards across these model years. Reliable SCR operation supports consistent exhaust flow and contributes to the proper function of downstream aftertreatment components. This page provides application-focused details to assist with identifying the Cummins B6.7 & L9 SCR 2018–2024 (OEM 5418488) for accurate service and replacement needs.

FITMENT CHART

YEARMAKEENGINE(S)
2018Cummins B6.7 L9
2019Cummins B6.7 L9
2020Cummins B6.7 L9
2021Cummins B6.7 L9
2022Cummins B6.7 L9
2023Cummins B6.7 L9
2024Cummins B6.7 L9

PEOPLE ALSO ASKS | BLOG(S)

The Cummins B6.7 / L9 SCR, OEM 5418488, plays multiple critical roles within the Selective Catalytic Reduction (SCR) aftertreatment system used on 2018–2024 Cummins B6.7 and L9 engines. Together, these roles ensure regulated emissions control and stable exhaust system operation.

Key roles of OEM 5418488

  • Reduces nitrogen oxide (NOx) emissions
    • The SCR catalyst provides the chemical surface needed to convert harmful NOx gases into safer byproducts before exhaust exits the system.
  • Works with Diesel Exhaust Fluid (DEF)
    • DEF is injected upstream, and the SCR unit enables the chemical reaction that converts NOx into nitrogen and water vapor.
  • Supports emissions compliance
    • Proper SCR operation is essential for meeting emissions regulations across 2018–2024 B6.7 and L9 applications.
  • Maintains stable aftertreatment operation
    • By efficiently converting NOx, the SCR helps prevent warning lights, fault codes, and reduced-operation (derate) conditions.
  • Protects other aftertreatment components
    • Correct SCR function reduces strain on sensors, DEF dosing components, and downstream exhaust parts.
  • Works with sensor feedback systems
    • The SCR interacts with temperature and NOx sensors to confirm conversion efficiency and system health.

OEM 5418488 serves as the core SCR catalyst module that enables effective NOx reduction and reliable aftertreatment performance on Cummins B6.7 and L9 engines from 2018 to 2024.

The main cause of SCR (Selective Catalytic Reduction) failure is DEF-related issues, with DEF contamination and DEF crystallization being the most common culprits.

SCR systems rely on clean DEF, precise dosing, and proper exhaust temperatures to reduce NOx emissions. When DEF quality is compromised or DEF dries inside the system, deposits form that restrict flow and poison the SCR catalyst, reducing its ability to function.

The most common causes of SCR failure include:

  • DEF crystallization
    • DEF dries and forms crystals in the doser, injector, mixing pipe, and SCR inlet, restricting flow and reducing NOx conversion.
  • Contaminated or incorrect DEF
    • Low-quality DEF, diluted DEF, or DEF mixed with fuel, oil, or minerals permanently damages the SCR catalyst.
  • Incorrect DEF dosing
    • Failed DEF pumps, clogged injectors, bad doser valves, or damaged heated lines cause under- or over-dosing, triggering SCR efficiency faults.
  • Improper exhaust temperatures
    • Exhaust that is too cold (short trips) or too hot (thermal damage) reduces SCR efficiency and accelerates catalyst degradation.
  • Upstream DOC/DPF problems
    • Issues with the DOC or DPF can alter exhaust flow and temperature, placing extra stress on the SCR system.

SCR failure is most often caused by DEF crystallization, DEF contamination, and dosing problems, which prevent proper NOx reduction and lead to repeated emissions fault codes.

Frequent aftertreatment warnings and abnormal sensor readings can indicate issues with the SCR catalyst.

NOx sensors measure exhaust NOx levels before and after the SCR catalyst to monitor conversion effectiveness.

Yes, faults in the SCR system can lead to aftertreatment diagnostic fault codes.

It supports the reduction of regulated nitrogen oxides as part of the engine’s emissions aftertreatment system.

Cummins SCRs