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Cummins B6.7, L9 SCR 2018-2024: OEM 5418483

CUMMINS B6.7, L9 SCR 2018-2024: OEM 5418483

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 NUMBER5418483
PART TYPESCR
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEB6.7, L9
YEAR2018-2024
PART NUMBER5418483RM-SCR-4
APPLICATION NOTESAll Ratings EPA21, EPA17

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx SCR, Tamerx part number 5418483RM-SCR-4 ( OEM Part Number 5418483 ). 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 OEM5418483
Additional OEM5418483

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490552319
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.


Covering 2018–2024 Cummins B6.7 and L9 diesel applications, the SCR unit with OEM 5418483 is a key part of the exhaust aftertreatment system. This selective catalytic reduction module is engineered to match factory exhaust configurations and emissions sensor locations specific to the B6.7 and L9 platforms. Its role is to work with diesel exhaust fluid (DEF) to reduce nitrogen oxides (NOₓ) in the exhaust stream, supporting compliance with applicable emissions standards for these model years. Reliable SCR operation supports consistent exhaust flow and contributes to the effective performance of downstream aftertreatment components. This page provides application-focused information to assist with identifying the Cummins B6.7 & L9 SCR 2018–2024 (OEM 5418483) for 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 5418483, is a core component of the Selective Catalytic Reduction (SCR) aftertreatment system used on Cummins B6.7 and L9 diesel engines from 2018 through 2024. Its purpose is to treat exhaust gases and reduce regulated emissions before they exit the vehicle.

This SCR unit is often referred to as an SCR filter or SCR catalyst, though it does not trap soot like a DPF. Instead, it supports a chemical conversion process focused on reducing nitrogen oxide (NOx) emissions, which are a major byproduct of diesel combustion.

The SCR system works in combination with Diesel Exhaust Fluid (DEF). DEF is injected into the exhaust stream upstream of the SCR unit. When DEF mixes with hot exhaust gases, it breaks down into ammonia. Inside the SCR catalyst (OEM 5418483), ammonia reacts with NOx and converts it into nitrogen and water vapor, which are far less harmful.

What OEM 5418483 does in the system

  • Serves as the catalytic stage for NOx reduction
  • Works with DEF dosing to treat exhaust gases
  • Supports emissions compliance for B6.7 and L9 engines
  • Helps maintain stable aftertreatment operation and prevent SCR faults

Cummins OEM 5418483 is a genuine SCR catalyst module that plays a critical role in emissions control for Cummins B6.7 and L9 applications from 2018–2024.

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

SCR systems rely on clean DEF, accurate dosing, and proper exhaust temperatures to reduce NOx emissions. When DEF quality is poor or DEF dries inside the system, deposits form and the SCR catalyst can no longer function correctly.

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 poisons 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 issues
    • Problems with the DOC or DPF affect 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.

NOx sensors and temperature sensors monitor conditions around the SCR catalyst.

Yes, it is an original Cummins specified SCR catalyst module for compatible engines.

Yes, the SCR catalyst module can typically be serviced or replaced separately from the rest of the aftertreatment assembly.

It targets nitrogen oxides (NOx) in the exhaust stream.

Cummins SCRs

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