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Cummins X15 SCR 2018-2021: OEM 5418500

CUMMINS X15 SCR 2018-2021: OEM 5418500

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 NUMBER5418500
PART TYPESCR
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEX15
YEAR2018-2021
PART NUMBER102-0291RM-SCR-8
APPLICATION NOTESTerex Advance, 485-565, EPA17

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx SCR, Tamerx part number 102-0291RM-SCR-8 ( OEM Part Number 5418500 ). 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 OEM5418500
Additional OEM5418500

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490551718
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 heavy-duty engine in peak form with the Cummins X15 SCR 2018–2021: OEM 5418500, engineered for dependable emissions performance. This genuine OEM Selective Catalytic Reduction unit helps slash harmful pollutants while improving fuel efficiency on every run. Built for durability and seamless integration, it’s a smart upgrade for demanding road conditions. Stay compliant and road-ready with performance you can trust.

FITMENT CHART

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

PEOPLE ALSO ASKS | BLOG(S)

For diesel truck owners, maintaining a clean, efficient, and compliant exhaust system isn’t just good practice — it’s essential for avoiding downtime and costly repairs. A key part of that system is the Selective Catalytic Reduction (SCR) assembly, which reduces harmful emissions before they leave the tailpipe. For Cummins X15 engines from 2018 to 2021, the Cummins X15 SCR 2018–2021: OEM 5418500 delivers the correct fit and dependable performance you need to keep your emissions control working as intended.

    • The SCR assembly helps cut nitrogen oxide (NOx) emissions by turning them into harmless nitrogen and water,
      which is crucial for meeting EPA emissions standards and keeping your truck compliant.

    • The OEM 5418500 SCR component is engineered specifically for Cummins X15 engines built between 2018 and 2021,
      ensuring accurate fitment and seamless integration with the factory aftertreatment system.

    • Working alongside your DEF dosing and overall exhaust treatment setup, this SCR unit supports balanced emissions control,
      helping optimize DEF use and maintain efficient system performance.

    • Installing a correct OEM SCR replacement helps reduce the risk of emissions warning lights, fault codes, and derate conditions,
      keeping your truck on the road and out of the shop.

    • A properly functioning SCR system also protects other aftertreatment components by minimizing emissions buildup,
      supporting longer service life and fewer unexpected repairs.

    • Choosing an OEM-quality part like the Cummins X15 SCR 2018–2021: OEM 5418500 gives you confidence in durability,
      correct system integration, and reliable emissions performance.

Selecting the right SCR component is more than just a part swap — it’s a smart investment in your truck’s health and uptime. The OEM 5418500 SCR assembly helps restore effective NOx reduction and supports smooth, compliant operation of your Cummins X15 engine. At Tamerx Diesel Parts, we provide trusted components to help you minimize downtime and keep your diesel truck performing at its best.

A Selective Catalytic Reduction (SCR) system is designed to reduce nitrogen oxide emissions, but it also works closely with the engine control module. When the SCR begins to fail, the vehicle may adjust engine performance to stay within emissions limits. In many cases, this can result in noticeable power loss.

  • Engine derate activation: The system may limit horsepower to protect emissions compliance.

  • NOx sensor faults: Incorrect readings can cause the engine to adjust fueling and reduce output.

  • DEF dosing problems: Improper DEF injection can disrupt exhaust treatment and trigger power limitations.

  • Increased exhaust backpressure: Restriction within the SCR can make the engine work harder.

  • Persistent warning lights: SCR or check engine alerts often appear alongside reduced performance.

  • Progressive power reduction: Some vehicles gradually decrease power if the issue is not corrected.

A failing SCR can definitely cause power loss, especially when protective measures are activated. Prompt diagnostics and repairs help restore full engine performance and prevent further emissions system damage.

By reducing harmful NOx emissions, this SCR unit helps your engine operate within emissions standards and lowers air pollution. Cleaner exhaust also supports better regulatory compliance.

Frequent SCR or DEF warning lights, increased NOx fault codes, and reduced engine performance are frequent indicators. These symptoms suggest the SCR system isn’t effectively processing emissions.

You should consider replacement if the system consistently triggers warning codes or reports poor NOx reduction during diagnostics. Prompt action helps prevent further emissions and performance issues.

While the SCR system’s main purpose is emissions control, a healthy aftertreatment system prevents engine protection modes that can lower fuel economy. A properly functioning SCR unit supports smoother, more efficient operation.

Cummins SCRs

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