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Cummins X15 SCR 2018-2021: OEM 5418546

CUMMINS X15 SCR 2018-2021: OEM 5418546

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 NUMBER5418546
PART TYPESCR
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEX15
YEAR2018-2021
PART NUMBER5418546RM-SCR-2
APPLICATION NOTESPACCAR, 485-565, EPA17

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx SCR, Tamerx part number 5418546RM-SCR-2 ( OEM Part Number 5418546 ). 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 X15, production years 2018-2021, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM5418546
Additional OEM5418546

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490551039
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.


Built for reliability in modern emissions systems, the Cummins X15 SCR (OEM 5418546) is designed to support proper exhaust aftertreatment function in 2018–2021 Cummins X15 engines. This component plays a key role in reducing exhaust emissions by helping manage the selective catalytic reduction process. Manufactured to match OEM specifications, it offers dependable compatibility and a direct-fit installation. It’s a solid replacement option for maintaining the efficiency and operation of your X15 aftertreatment system.

FITMENT CHART

YEARMAKEENGINE(S)
2018Cummins X15
2019Cummins X15
2020Cummins X15
2021Cummins X15

PEOPLE ALSO ASKS | BLOG(S)

Managing nitrogen oxide emissions is a critical part of diesel engine exhaust treatment. The Cummins X15 SCR 2018–2021: OEM 5418546 is a Selective Catalytic Reduction (SCR) assembly designed to help reduce NOx emissions produced during the combustion process. Installed within the aftertreatment system, this SCR component works with diesel exhaust fluid (DEF) to convert harmful gases into nitrogen and water vapor before they exit the exhaust system.

  • Designed for Cummins X15 engines from 2018 to 2021, the OEM 5418546 SCR integrates with the factory exhaust aftertreatment configuration.

  • The SCR catalyst chamber provides the reaction surface where DEF interacts with nitrogen oxide gases in the exhaust stream.

  • As exhaust gases flow through the catalyst structure, chemical reactions break down NOx emissions into less harmful compounds.

  • The catalyst substrate inside the SCR unit contains multiple channels that increase surface area for consistent exhaust gas treatment.

  • A properly functioning OEM 5418546 SCR assembly helps maintain balanced readings from emission sensors located before and after the catalyst.

  • The SCR system works together with DEF dosing components and other aftertreatment parts to control exhaust chemistry.

  • The catalyst housing is built to withstand high exhaust temperatures and continuous heavy-duty engine operation.

  • Replacing a worn or restricted SCR unit can help restore proper exhaust gas processing within the emission system.

The Cummins X15 SCR 2018–2021: OEM 5418546 from Tamerx Diesel Parts provides a dependable replacement option for maintaining the aftertreatment system. Installing the correct SCR assembly helps support consistent emission treatment and reliable exhaust system function during daily truck operation.

The Selective Catalytic Reduction (SCR) system is designed to reduce nitrogen oxide (NOx) emissions by injecting Diesel Exhaust Fluid (DEF) into the exhaust stream. When functioning correctly, the SCR system operates in the background without noticeable issues. Knowing the signs of proper operation can help ensure your diesel engine remains compliant and efficient.

  • No warning lights are present on the dashboard. A properly working SCR system should not trigger check engine, DEF, or emissions-related alerts.

  • The vehicle runs at normal power levels without entering derate or reduced performance mode.

  • DEF consumption remains steady and consistent with the manufacturer’s expected usage range.

  • Emissions tests are passed without difficulty, indicating effective NOx reduction.

  • Diagnostic scans show no active fault codes related to NOx sensors, DEF injectors, temperature sensors, or catalyst efficiency.

  • Exhaust system components, including the DPF, are functioning correctly without frequent regeneration issues.

Regular monitoring and routine maintenance are key to confirming proper SCR operation. By paying attention to warning lights, maintaining DEF quality, and addressing small issues early, you can ensure the SCR system continues to perform reliably and maintain emissions compliance.

Yes, buildup or contamination inside the catalyst can restrict exhaust flow. This can cause emissions warnings and reduced engine performance.

Issues can come from contaminated DEF, faulty sensors, or catalyst wear over time. Exhaust leaks or system restrictions can also affect operation.

.The lifespan depends on driving conditions and maintenance. Proper DEF use and routine system checks can help extend its life.

The catalytic reaction that reduces emissions works best at specific temperatures. If the exhaust is too cool, the reaction may not occur efficiently.

Cummins SCRs