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Cummins L9 SCR 2022-2024: OEM 5507876

CUMMINS L9 SCR 2022-2024: OEM 5507876

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 NUMBER5507876
PART TYPESCR
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEL9
YEAR2022-2024
PART NUMBER5507876RM-SCR-3
APPLICATION NOTESFCCC 370-450 EPA21

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx SCR, Tamerx part number 5507876RM-SCR-3 ( OEM Part Number 5507876 ). 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 2022-2024, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM5507876
Additional OEM5507876

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490551398
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.


Designed for 2022–2024 Cummins L9 diesel applications, the SCR unit with OEM 5507876 is a key part of the exhaust aftertreatment system. This selective catalytic reduction module is engineered to align with the L9 engine’s exhaust layout and emissions sensor locations, ensuring proper integration with the factory DEF (diesel exhaust fluid) delivery and control systems. Its role is to work with DEF to help reduce nitrogen oxide (NOₓ) emissions in the exhaust stream, supporting compliance with applicable emissions standards for these model years. Consistent SCR operation helps maintain steady exhaust flow and supports the effectiveness of downstream aftertreatment components. This page provides application-specific details to assist with identifying the Cummins L9 SCR 2022–2024 (OEM 5507876) for service and replacement needs.

FITMENT CHART

YEARMAKEENGINE(S)
2022Cummins L9
2023Cummins L9
2024Cummins L9

PEOPLE ALSO ASKS | BLOG(S)

The Cummins L9 SCR, OEM 5507876, is a vital emissions component used on 2022–2024 Cummins L9 diesel engines. Its main role is to reduce nitrogen oxide (NOx) emissions, helping vehicles meet strict emissions regulations while keeping the aftertreatment system operating correctly.

SCR stands for Selective Catalytic Reduction, a process that treats exhaust gases after combustion. Instead of trapping soot like a DPF, the SCR catalyst focuses on chemical conversion. The system injects Diesel Exhaust Fluid (DEF) into the exhaust stream upstream of the SCR unit. As DEF mixes with hot exhaust, it breaks down into ammonia, which reacts inside the catalyst to convert NOx into nitrogen and water vapor—two far less harmful byproducts.

This makes the SCR system essential for modern diesel applications, especially in commercial trucks and vocational equipment that depend on consistent emissions control.

Key roles of the Cummins L9 SCR (OEM 5507876) include:

  • Converting NOx into safer exhaust byproducts
  • Working with DEF dosing to treat regulated emissions
  • Supporting emissions compliance for Cummins L9 engines
  • Helping prevent SCR fault codes, warning lights, and derate conditions
  • Promoting stable aftertreatment operation in 2022–2024 applications

OEM 5507876 is a core part of the Cummins L9 aftertreatment system, supporting clean exhaust operation and long-term emissions reliability.

The main cause of SCR (Selective Catalytic Reduction) failure is DEF-related problems, especially DEF contamination and DEF crystallization.

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

The most common causes of SCR failure include:

  • DEF crystallization
    • DEF can dry and form crystals in the doser/injector, mixing pipe, and SCR inlet, restricting flow and reducing NOx conversion.
  • Contaminated or incorrect DEF
    • Low-quality DEF, diluted DEF, or DEF contaminated with fuel/oil/minerals can permanently poison the SCR catalyst.
  • Incorrect DEF dosing
    • A failing DEF pump, clogged injector, bad doser valve, or damaged heated lines can cause under- or over-dosing, triggering SCR efficiency faults and derate.
  • Improper exhaust temperatures
    • Exhaust that is too cold (short trips) or too hot (thermal damage) reduces SCR effectiveness and accelerates failure.
  • Upstream DOC/DPF problems
    • DOC or DPF failures can affect exhaust flow and temperature, placing extra stress on the SCR system.

SCR failure is most often caused by DEF crystallization, DEF contamination, and dosing issues, which prevent proper NOx reduction and lead to repeated emissions fault codes.

Yes, proper DEF quality helps ensure effective chemical reactions in the SCR system.

Frequent aftertreatment warnings and abnormal sensor readings can indicate SCR assembly problems.

NOx sensors measure exhaust NOx levels before and after the SCR assembly to monitor conversion effectiveness.

Yes, SCR system problems can lead to aftertreatment diagnostic codes.

Cummins SCRs

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