Loading...

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-4
APPLICATION NOTESDTNA, 485-565, EPA17

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx SCR, Tamerx part number 5418501RM-SCR-4 ( 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 / Barcode00840490550674
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.


Turn your emissions system into a performance asset with the Cummins X15 SCR 2018–2021: OEM 5418501, engineered to help your engine run cleaner and more efficiently. This genuine OEM Selective Catalytic Reduction unit reduces harmful pollutants while enhancing fuel economy for demanding heavy-duty applications. Built tough for long life and a seamless fit, it’s ready for rugged road conditions. Keep your rig compliant and performing strong mile after mile.

FITMENT CHART

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

PEOPLE ALSO ASKS | BLOG(S)

Keeping your heavy-duty truck operating within emissions standards and running smoothly means paying attention to the exhaust aftertreatment system — and the Selective Catalytic Reduction (SCR) assembly is one of its most important parts. For Cummins X15 engines produced between 2018 and 2021, the Cummins X15 SCR 2018–2021: OEM 5418501 delivers a factory-matched emissions control solution that supports reliable NOx reduction and helps your truck stay compliant and dependable.

    • The SCR assembly helps reduce nitrogen oxide (NOx) emissions by converting them into harmless nitrogen and water,
      helping your truck meet environmental standards and produce cleaner exhaust.

    • The OEM 5418501 SCR component is engineered specifically for Cummins X15 engines from 2018 to 2021,
      ensuring precise fitment and smooth integration with your vehicle’s original aftertreatment system.

    • This SCR unit works with your DEF dosing system to support effective exhaust cleaning,
      helping maintain balanced emissions performance and promote efficient DEF use.

    • Using the correct OEM SCR replacement helps reduce the likelihood of emissions warning lights, fault codes,
      and derate conditions that can interrupt operation and lead to unexpected downtime.

    • A properly functioning SCR system helps relieve stress on other aftertreatment components by minimizing excessive emissions buildup,
      which can contribute to longer service life and fewer maintenance surprises.

    • Choosing a quality OEM part like the Cummins X15 SCR 2018–2021: OEM 5418501 gives you confidence in durability,
      correct system integration, and reliable emissions control performance.

Selecting the right SCR assembly is a smart investment in maintaining your Cummins X15’s emissions system and avoiding costly issues down the road. The OEM 5418501 SCR unit delivers dependable performance and proper fitment, helping your truck stay compliant, reduce emissions-related interruptions, and continue performing at its best. At Tamerx Diesel Parts, we provide quality components you can trust to help keep your diesel running clean and efficiently.

A Selective Catalytic Reduction (SCR) system is a vital part of modern diesel emissions control, helping reduce nitrogen oxide levels through the use of diesel exhaust fluid (DEF). Unlike soot-trapping filters, the SCR catalyst does not require frequent cleaning, but regular monitoring and preventive maintenance are still important for long-term reliability.

  • Inspect during scheduled maintenance: SCR components should be checked whenever the exhaust or emissions system is serviced.

  • Service is often condition-based: SCR systems are typically serviced when warning lights or fault codes appear.

  • Maintain DEF quality and supply: Using clean, manufacturer-approved DEF helps prevent contamination and deposits.

  • Check sensors and dosing components: NOx sensors and DEF injectors should be inspected if performance issues occur.

  • Driving habits affect service needs: Frequent short trips and low exhaust temperatures can increase the risk of DEF crystallization.

  • Replacement is not routine: SCR catalysts are usually replaced only when damaged or no longer effective.

SCR servicing does not follow a strict schedule, but routine inspections and early response to warning signs help prevent costly repairs. Proper DEF management and emissions system care are key to extending SCR life and maintaining reliable vehicle operation.

Indirectly, yes — when emissions systems operate correctly, the engine can maintain balanced combustion and optimal exhaust flow. This can support stable fuel economy over time.

Built to OEM durability standards, this SCR unit is made to withstand regular diesel exhaust conditions. With proper maintenance and DEF quality, it can provide reliable service through its intended lifespan.

Restricted flow or internal failure may lead to increased backpressure, emissions warnings, or engine derate conditions. Replacing the SCR with the Cummins X15 SCR 2018-2021: OEM 5418501 can resolve these issues.

It’s a key part of the exhaust aftertreatment system that ensures harmful NOx gases are reduced effectively. The Cummins X15 SCR 2018-2021: OEM 5418501 supports emissions compliance, environmental responsibility, and optimal engine operation.

Cummins SCRs

PRODUCT VIDEOS