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Cummins N13 SCR 2018-2021: OEM 5418532

CUMMINS N13 SCR 2018-2021: OEM 5418532

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 NUMBER5418532
PART TYPESCR
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEN13
YEAR2018-2021
PART NUMBER5418532RM-SCR
APPLICATION NOTESNavistar, 365-475, EPA17

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx SCR, Tamerx part number 5418532RM-SCR ( OEM Part Number 5418532 ). 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 N13, production years 2018-2021, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM5418532
Additional OEM5418532

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490550889
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 2018–2021 Cummins N13 diesel applications, the SCR unit (OEM 5418532) is a critical component of the exhaust aftertreatment system. This selective catalytic reduction component is engineered to match factory exhaust configurations and emissions sensor locations specific to the N13 platform. Its function is to work with diesel exhaust fluid (DEF) to reduce nitrogen oxide (NOₓ) emissions in the exhaust stream, supporting compliance with applicable emissions standards for these model years. Reliable SCR operation helps maintain consistent exhaust flow and supports the effectiveness of the overall aftertreatment system. This page provides application-specific information to assist with accurate identification of the Cummins N13 SCR OEM 5418532 for service and replacement needs.

FITMENT CHART

YEARMAKEENGINE(S)
2018Cummins N13
2019Cummins N13
2020Cummins N13
2021Cummins N13

PEOPLE ALSO ASKS | BLOG(S)

The Cummins N13 SCR, part number OEM 5418532, is a core component of the Selective Catalytic Reduction (SCR) emissions system used on Cummins N13 engines built between 2018 and 2021. It plays a central role in managing exhaust gases before they exit the vehicle, helping the engine meet emissions standards while supporting smooth operation.

At its core, the SCR system is designed to reduce nitrogen oxides (NOx)—harmful byproducts of diesel combustion. The N13 SCR module works in tandem with Diesel Exhaust Fluid (DEF), a non-hazardous fluid that is injected into the exhaust stream. When DEF mixes with hot exhaust inside the SCR unit, a chemical reaction takes place that converts NOx into nitrogen and water vapor, both of which are far less harmful to the environment.

The Cummins N13 SCR assembly sits downstream of other aftertreatment components, such as the diesel oxidation catalyst (DOC) and diesel particulate filter (DPF), forming part of a complete system that treats exhaust in stages.

What the N13 SCR Does:

  • Provides a catalytic surface for NOx conversion
  • Works with DEF dosing to treat exhaust gases
  • Helps the engine comply with emissions regulations
  • Interfaces with sensors that monitor temperature and NOx levels

In essence, OEM 5418532 is a genuine Cummins part engineered to help the N13 engine’s aftertreatment system reduce emissions and operate reliably from 2018 through 2021.

The main cause of SCR (Selective Catalytic Reduction) failure is DEF-related issues, especially DEF contamination and DEF crystallization, which prevent the SCR system from reducing NOx properly.

SCR systems depend on clean DEF, correct dosing, and proper exhaust temperatures. When DEF quality is poor or DEF dries inside the system, deposits form and the catalyst becomes ineffective.

The most common causes of SCR failure include:

  • DEF crystallization
    • DEF can dry and form crystals in the doser, injector, mixing tube, and SCR inlet, restricting flow and disrupting NOx conversion.
  • Contaminated or incorrect DEF
    • Poor-quality DEF, diluted DEF, or DEF contaminated with fuel/oil/minerals can permanently poison the SCR catalyst.
  • DEF dosing component failure
    • A failing DEF pump, doser valve, injector, or heated line can cause under- or over-dosing, triggering NOx efficiency faults and system derate.
  • Improper exhaust temperatures
    • Exhaust that is too cold (short trips) or too hot (thermal damage) reduces SCR efficiency and accelerates failure.
  • Upstream emissions issues
    • DOC/DPF problems can alter exhaust flow and temperatures, overloading the SCR system and causing repeated SCR efficiency problems.

SCR failure is most often caused by DEF contamination, DEF crystallization, and incorrect DEF dosing, which leads to reduced NOx conversion and recurring emissions faults.

OEM 5418532 is an SCR (Selective Catalytic Reduction) catalyst assembly used in diesel aftertreatment systems for emissions control.

It helps convert nitrogen oxides (NOx) in the exhaust into nitrogen and water when used with DEF.

Yes, it is a key emissions component in the SCR aftertreatment system.

Diesel Exhaust Fluid (DEF) is used with the SCR system.

Cummins SCRs

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