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Cummins L9 SCR 2018-2021: OEM 5418518

CUMMINS L9 SCR 2018-2021: OEM 5418518

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 NUMBER5418518
PART TYPESCR
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEL9
YEAR2018-2021
PART NUMBER5418518RM-SCR-2
APPLICATION NOTESPACCAR, 250-320, EPA17

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx SCR, Tamerx part number 5418518RM-SCR-2 ( OEM Part Number 5418518 ). 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 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 OEM5418518
Additional OEM5418518

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490550766
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.


A critical component in the diesel exhaust aftertreatment system, the Cummins L9 SCR 2018–2021 (OEM 5418518) is designed for compatibility with select Cummins L9 engine applications. This Selective Catalytic Reduction (SCR) unit works with diesel exhaust fluid (DEF) to convert nitrogen oxides in the exhaust stream into less harmful gases before they exit the vehicle. Built to meet original equipment specifications, it is engineered for proper fitment and reliable integration with existing emissions components. The durable construction is designed to withstand the high temperatures and demanding operating conditions common in heavy-duty diesel environments. Replacing a worn or restricted SCR unit with the OEM 5418518 helps maintain proper exhaust aftertreatment function and supports compliance with emissions regulations.

FITMENT CHART

YEARMAKEENGINE(S)
2018Cummins L9
2019Cummins L9
2020Cummins L9
2021Cummins L9

PEOPLE ALSO ASKS | BLOG(S)

The Cummins L9 SCR (Selective Catalytic Reduction) system, OEM 5418518, is an essential component in the emissions control system used in many Cummins L9 engines manufactured between 2018 and 2021. Its primary importance lies in its ability to reduce nitrogen oxide (NOx) emissions produced during diesel combustion, helping vehicles comply with modern environmental standards.

The SCR system operates as one of the final stages of the exhaust aftertreatment process. After exhaust gases pass through components such as the Diesel Oxidation Catalyst (DOC) and Diesel Particulate Filter (DPF), the SCR system treats the remaining pollutants before the exhaust leaves the vehicle.

Key Reasons the Cummins L9 SCR 5418518 Is Important

  • Reduces nitrogen oxide (NOx) emissions
    • from diesel exhaust gases
  • Uses diesel exhaust fluid (DEF)
    • to enable chemical reactions that treat exhaust gases
  • Converts NOx into nitrogen and water vapor,
    • which are less harmful to the environment
  • Helps diesel engines meet emissions regulations
    • for heavy-duty vehicles
  • Works with other aftertreatment components
    • to complete the exhaust treatment process

The SCR system ensures that the exhaust gases leaving the engine are treated effectively. Without a properly functioning SCR unit, nitrogen oxide emissions can increase and the emissions system may not operate as intended.

For trucks equipped with Cummins L9 engines from 2018 to 2021, the OEM 5418518 SCR system plays a crucial role in maintaining proper emissions control and supporting the reliability of the entire aftertreatment system.

A Selective Catalytic Reduction (SCR) system is designed to last for a long time while helping diesel vehicles meet emissions standards. The SCR catalyst works with diesel exhaust fluid (DEF) to convert nitrogen oxide gases into less harmful substances before they exit the exhaust system. Although the component is built for durability, it may eventually require replacement.

In many diesel applications, an SCR catalyst can last between 300,000 and 500,000 miles under normal operating conditions. However, its lifespan can vary depending on vehicle use, maintenance practices, and the condition of related emissions components.

Several factors can influence how long an SCR system remains effective, including:

  • Contaminated or low-quality DEF
    • that leaves deposits inside the catalyst
  • DEF crystallization
    • that interferes with fluid dosing
  • Sensor or injector issues
    • affecting proper DEF delivery
  • Excessive soot or residue
    • entering the exhaust system
  • Unresolved engine problems
    • that affect emissions components

Drivers should also watch for warning signs that the SCR system may be reaching the end of its service life. Emissions-related warning lights, diagnostic trouble codes, or DEF system alerts can indicate a problem.

Routine inspections and proper DEF handling can help extend the lifespan of the SCR system. Addressing sensor or engine issues early can also help prevent unnecessary stress on the catalyst and reduce the likelihood of premature replacement.

They can verify compatibility by matching the OEM reference number 5418518 with the engine model and applicable production years.

The catalyst is designed to reduce nitrogen oxide gases produced during diesel combustion.

The SCR catalyst enables reactions that convert nitrogen oxides in the exhaust into nitrogen and water.

The diesel exhaust fluid dosing system introduces DEF into the exhaust stream to support the catalytic reaction.

Cummins SCRs