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Cummins B6.7, L9 SCR 2018-2021: OEM 5418547

CUMMINS B6.7, L9 SCR 2018-2021: OEM 5418547

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 NUMBER5418547
PART TYPESCR
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEB6.7, L9
YEAR2018-2021
PART NUMBER5418547RM-SCR-2
APPLICATION NOTESAutocar, 200-320, EPA17

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx SCR, Tamerx part number 5418547RM-SCR-2 ( OEM Part Number 5418547 ). 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 2018-2021, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM5418547
Additional OEM5418547

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490551053
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.


Keep your emissions system working the way it should with the Cummins B6.7 / L9 SCR (OEM 5418547) designed for 2018–2021 engines. This SCR unit is a key component of the aftertreatment system, helping convert exhaust gases into cleaner emissions through the selective catalytic reduction process. Manufactured to match OEM specifications, it provides dependable compatibility and a direct-fit installation. A practical replacement solution for maintaining proper operation of your Cummins B6.7 or L9 exhaust aftertreatment system.

FITMENT CHART

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

PEOPLE ALSO ASKS | BLOG(S)

Diesel engines produce nitrogen oxide gases during combustion that must be treated before leaving the exhaust system. The Cummins B6.7, L9 SCR 2018–2021: OEM 5418654 is a Selective Catalytic Reduction (SCR) assembly designed to reduce these emissions by supporting the chemical reaction that converts nitrogen oxides into safer compounds within the exhaust stream.

  • Designed for Cummins B6.7 and L9 engines from 2018 to 2021, the OEM 5418654 SCR fits directly into the factory exhaust aftertreatment system.

  • The catalyst chamber allows diesel exhaust fluid to mix with exhaust gases so nitrogen oxide emissions can be treated.

  • As gases pass through the catalyst substrate, chemical reactions transform harmful NOx gases into nitrogen and water vapor.

  • The internal honeycomb-style structure increases the surface area where emission-reducing reactions take place.

  • A properly functioning OEM 5418654 SCR assembly supports stable readings from NOx sensors placed before and after the catalyst.

  • The SCR works together with the DEF system, which injects a urea-based fluid into the exhaust stream to assist with emission reduction.

  • The durable housing is designed to tolerate continuous exposure to high exhaust temperatures during heavy-duty truck operation.

  • Replacing a restricted or worn SCR unit helps restore proper exhaust flow and consistent emission system function.

The Cummins B6.7, L9 SCR 2018–2021: OEM 5418654 from Tamerx Diesel Parts provides a dependable replacement solution for maintaining proper aftertreatment operation. With the correct SCR assembly installed, the emission system can continue processing exhaust gases effectively while supporting reliable engine operation.

The Selective Catalytic Reduction (SCR) system is responsible for reducing nitrogen oxide (NOx) emissions in modern diesel engines through the use of Diesel Exhaust Fluid (DEF). When the system begins to develop issues, it often provides early warning signs before complete failure occurs. Recognizing these symptoms early can help prevent engine derate, emissions violations, and costly repairs.

  • An illuminated check engine light is often one of the first indicators of a developing SCR problem. Early fault codes may relate to DEF dosing, NOx sensors, or catalyst efficiency.

  • A DEF warning message or low-quality DEF alert may appear if the system detects improper fluid or dosing irregularities.

  • Slight increases in DEF consumption can signal that the system is compensating for reduced efficiency.

  • Occasional emissions-related messages that clear temporarily may indicate an intermittent sensor or injector issue.

  • Delayed or irregular regeneration events in related exhaust components can affect overall aftertreatment performance.

  • Minor drops in fuel efficiency or subtle changes in engine response may occur if the system is not operating at full efficiency.

Catching these early warning signs allows for prompt diagnosis and repair before more serious problems develop. Regular inspections, proper DEF handling, and immediate attention to dashboard alerts can help extend the life of the SCR system and maintain reliable emissions control.

Yes, deposits and contaminants in the exhaust stream can build up inside the Cummins B6.7, L9 SCR 2018–2021: OEM 5418547 over time.

The Cummins B6.7, L9 SCR 2018–2021: OEM 5418547 works with DEF injectors, sensors, and other aftertreatment components to control emissions.

The Cummins B6.7, L9 SCR 2018–2021: OEM 5418547 converts NOx gases in the exhaust stream so other aftertreatment components can function properly.

Yes, problems with the Cummins B6.7, L9 SCR 2018–2021: OEM 5418547 can cause reduced engine power due to emissions system protections.

Cummins SCRs