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Cummins B6.7, L9 SCR 2018-2021: OEM 5418652

CUMMINS B6.7, L9 SCR 2018-2021: OEM 5418652

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 NUMBER5418652
PART TYPESCR
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEB6.7, L9
YEAR2018-2021
PART NUMBER5418652RM-SCR
APPLICATION NOTESNavistar, 200-320, EPA17, EPA21

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx SCR, Tamerx part number 5418652RM-SCR ( OEM Part Number 5418652 ). 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 OEM5418652
Additional OEM5418652

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490551169
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 aftertreatment system operating at its best with the Cummins B6.7, L9 SCR 2018–2021: OEM 5418652, an essential component designed for modern diesel emissions control. This SCR assembly works with DEF to convert nitrogen oxides in the exhaust into nitrogen and water, helping reduce harmful emissions.Designed to match OEM specifications, it provides dependable fitment and durability for both Cummins B6.7 and L9 engines. Count on a reliable emissions solution that helps maintain efficient operation and compliance on every mile.

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)

Modern diesel engines depend on advanced exhaust aftertreatment systems to reduce harmful emissions and meet environmental regulations. The Cummins B6.7, L9 SCR 2018–2021: OEM 5418652 is a Selective Catalytic Reduction (SCR) component designed to help reduce nitrogen oxide (NOx) emissions produced during diesel combustion. Positioned within the exhaust system, this SCR unit works together with diesel exhaust fluid (DEF) to convert harmful gases into safer compounds before they leave the vehicle.

  • Designed for Cummins B6.7 and Cummins L9 engines from 2018 to 2021, the OEM 5418652 SCR fits properly within the factory emission aftertreatment system.

  • Selective Catalytic Reduction technology works by injecting diesel exhaust fluid (DEF) into the exhaust stream where it reacts with nitrogen oxides.

  • The SCR catalyst helps convert these NOx emissions into nitrogen and water vapor, reducing harmful pollutants released from the exhaust system.

  • A properly functioning OEM 5418652 SCR unit supports stable emission system readings and balanced exhaust chemistry.

  • Accurate SCR operation helps maintain the correct DEF dosing process required for consistent emission reduction.

  • Installing the correct OEM SCR component helps reduce the likelihood of emission warning lights, diagnostic trouble codes, or system faults.

  • Built to withstand high exhaust temperatures, the SCR catalyst structure is engineered for durability under heavy-duty operating conditions.

  • Replacing a worn or restricted SCR assembly helps restore proper aftertreatment performance and maintain compliance with modern diesel emission standards.

Choosing the Cummins B6.7, L9 SCR 2018–2021: OEM 5418652 from Tamerx Diesel Parts helps ensure your emission system operates as designed. With the correct SCR unit installed, your engine can maintain cleaner exhaust output and dependable emission control for everyday driving.

The Selective Catalytic Reduction (SCR) system is a critical part of a diesel engine’s emissions setup, helping reduce nitrogen oxide (NOx) through the use of Diesel Exhaust Fluid (DEF). While the SCR system does not always require frequent replacement, regular inspection and maintenance are important to ensure proper operation. Knowing how often it should be serviced can help prevent warning lights, derate conditions, and emissions issues.

  • Most manufacturers recommend inspecting the SCR system during routine maintenance intervals, typically aligned with scheduled engine service. This allows technicians to check for fault codes, sensor issues, and proper DEF dosing.

  • DEF levels should be monitored regularly and refilled as needed. Running low or using contaminated DEF can lead to SCR system faults.

  • DEF filters, if equipped, may require periodic replacement depending on the vehicle’s service schedule and operating conditions.

  • NOx sensors and temperature sensors should be checked if diagnostic codes appear, as these components directly affect SCR performance.

  • Vehicles operating in severe conditions, such as heavy loads or frequent stop-and-go driving, may require more frequent inspections.

  • The SCR catalyst itself is designed to last many miles, but contamination or neglect can shorten its lifespan.

Regular servicing and proper DEF handling are key to keeping the SCR system functioning correctly. Following recommended maintenance intervals helps maintain emissions compliance, prevents unexpected power reduction, and supports long-term reliability of the diesel exhaust system.

Drivers may see emissions system alerts, check engine lights, or power reduction messages. These warnings occur when the system detects that NOx conversion is not working correctly.

Sensors monitor exhaust temperature and nitrogen oxide levels to help control the SCR process. This data allows the system to adjust DEF dosing for proper emissions reduction.

Catalyst wear, contaminated DEF, or sensor malfunctions can reduce efficiency. When this happens, the SCR system may not fully convert nitrogen oxide emissions.

The chemical reaction inside the SCR catalyst works best at specific exhaust temperatures. If the temperature is too low, emissions conversion may not occur as efficiently.

Cummins SCRs

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