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Cummins X15 SCR 2018-2021: OEM 5418501

CUMMINS X15 SCR 2018-2021: OEM 5418501

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 NUMBER5418501
PART TYPESCR
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEX15
YEAR2018-2021
PART NUMBER5418501RM-SCR-5
APPLICATION NOTESNavistar, 485-565, EPA17

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx SCR, Tamerx part number 5418501RM-SCR-5 ( OEM Part Number 5418501 ). 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 OEM5418501
Additional OEM5418501

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490550681
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.


Hit the road with cleaner power using the Cummins X15 SCR 2018–2021: OEM 5418501, engineered for superior emissions control and performance. This genuine OEM Selective Catalytic Reduction unit helps cut harmful pollutants while boosting fuel efficiency under heavy-duty conditions. Built rugged for durability and seamless fitment, it’s ready to endure tough hauls and long miles. Trust your rig to stay compliant and running strong wherever the journey takes you.

FITMENT CHART

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

PEOPLE ALSO ASKS | BLOG(S)

The Selective Catalytic Reduction (SCR) system is a critical part of modern diesel exhaust aftertreatment, helping reduce harmful emissions and support clean operation on the road. For Cummins X15 engines built from 2018 through 2021, the Cummins X15 SCR 2018–2021: OEM 5418501 provides an OEM-quality solution designed for proper integration with factory emissions components. Replacing the SCR assembly with the correct part helps ensure consistent exhaust treatment and fewer emissions-related interruptions.

    • The SCR assembly reduces nitrogen oxide (NOx) emissions by converting them into harmless nitrogen and water,
      supporting compliance with EPA emissions regulations for on-road diesel trucks.

    • The OEM 5418501 SCR unit is engineered specifically for Cummins X15 engines from 2018 to 2021,
      ensuring correct fitment and compatibility with the original aftertreatment system.

    • This SCR component works with the DEF dosing process to support effective exhaust cleaning,
      helping maintain balanced emissions control during everyday driving conditions.

    • Installing the proper OEM SCR assembly helps reduce the risk of fault codes, warning lights, and derate conditions,
      which can lead to downtime and costly diagnostics.

    • A well-functioning SCR system also helps protect other aftertreatment parts by minimizing excess emissions buildup,
      supporting longer service life across the exhaust system.

    • Choosing an OEM replacement like the Cummins X15 SCR 2018–2021: OEM 5418501 offers confidence in durability,
      system integration, and dependable emissions control performance.

Selecting the right SCR assembly is essential for maintaining proper exhaust aftertreatment on your Cummins X15 engine. The OEM 5418501 SCR unit delivers the fit and reliability needed to support clean emissions operation and reduce unwanted interruptions. At Tamerx Diesel Parts, we provide trusted diesel components to help you stay compliant and road-ready mile after mile.

 

A Selective Catalytic Reduction (SCR) system is designed to reduce nitrogen oxide emissions by treating exhaust gases with diesel exhaust fluid (DEF). While its main function is emissions control, a blocked or restricted SCR can also affect engine performance. When exhaust flow is limited, the engine may respond with reduced efficiency, warning lights, and power limitations.

  • Increased exhaust backpressure: Blockage restricts exhaust flow, forcing the engine to work harder.

  • Reduced engine power: Sluggish acceleration and decreased responsiveness may occur.

  • Engine derate or limp mode: The system may limit power output to protect emissions components.

  • Poor fuel economy: Higher backpressure and engine adjustments can increase fuel consumption.

  • SCR and NOx-related fault codes: Warning lights often appear when the system detects restriction or inefficiency.

  • Stress on related exhaust components: Continued restriction can impact sensors and downstream parts.

A blocked SCR can definitely cause engine performance problems if left unaddressed. Early diagnosis and proper maintenance help restore exhaust flow, prevent costly repairs, and maintain reliable vehicle operation.

By reducing NOx and facilitating cleaner exhaust, the Cummins X15 SCR 2018-2021: OEM 5418501 reduces stress on other aftertreatment parts. Cleaner exhaust flow helps protect sensors and catalysts.

It plays a critical role in reducing harmful emissions and ensuring compliance with strict environmental regulations. The Cummins X15 SCR 2018-2021: OEM 5418501 helps your engine run cleaner and more efficiently.

While its main role is to reduce emissions, a functioning SCR also helps maintain proper exhaust flow. This can indirectly support smoother engine performance and balanced combustion.

Yes, a professional installation is recommended to ensure correct fitment, sealing, and sensor integration. A technician can also verify DEF connections and prevent leaks.

Cummins SCRs

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