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Cummins B6.7 SCR 2018-2021: OEM 5507928

CUMMINS B6.7 SCR 2018-2021: OEM 5507928

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 NUMBER5507928
PART TYPESCR
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEB6.7
YEAR2018-2021
PART NUMBER5507928RM-SCR
APPLICATION NOTESAutocar, 200-240, EPA17

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx SCR, Tamerx part number 5507928RM-SCR ( OEM Part Number 5507928 ). 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 B6.7, production years 2018-2021, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM5507928
Additional OEM5507928

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490551565
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.


Used on 2018–2021 Cummins B6.7 diesel applications, the SCR unit with OEM 5507928 plays a central role in the emissions aftertreatment system. This selective catalytic reduction component is engineered to align with the B6.7 engine’s exhaust configuration and emissions sensor locations, ensuring proper integration with factory DEF (diesel exhaust fluid) delivery and control systems. Its function is to work with DEF to reduce nitrogen oxides (NOₓ) in the exhaust stream, supporting compliance with emissions requirements for these model years. Reliable SCR operation helps maintain consistent exhaust flow and contributes to the effectiveness of downstream aftertreatment components. This page provides application-focused details to assist with identifying the Cummins B6.7 SCR 2018–2021 (OEM 5507928) for service and replacement needs.

FITMENT CHART

YEARMAKEENGINE(S)
2018Cummins B6.7
2019Cummins B6.7
2020Cummins B6.7
2021Cummins B6.7

PEOPLE ALSO ASKS | BLOG(S)

The Cummins B6.7 SCR, identified by OEM part number 5507928, is a genuine outlet catalyst module used in the Selective Catalytic Reduction (SCR) emissions system on Cummins B6.7 engines from roughly 2018 through 2021 (and often through later years as a direct replacement). 

This part forms a key stage in the engine’s aftertreatment setup. After combustion, diesel exhaust contains nitrogen oxides (NOx), which are regulated pollutants. The SCR unit works with Diesel Exhaust Fluid (DEF) to chemically convert NOx into nitrogen and water vapor, substances that are far less harmful to the environment.

How It Fits Into the System

  • The B6.7 SCR sits downstream in the exhaust stream after components like the diesel oxidation catalyst and particulate filter. 
  • It relies on a catalyst-coated substrate to enable the NOx-reducing chemical reaction.
  • Sensors around the module monitor temperature and emissions to help the engine control module manage DEF dosing and reaction efficiency. 

By converting harmful exhaust gases into benign byproducts like nitrogen and water vapor, the Cummins SCR module (OEM 5507928) helps the B6.7 engine meet emissions standards and maintain reliable exhaust system operation under normal use. 

In short, this SCR unit is a core aftertreatment component that directly supports regulated emissions reduction in Cummins B6.7 applications.

You should replace your SCR (Selective Catalytic Reduction) filter/catalyst when it can no longer reduce NOx effectively and continues triggering emissions faults—even after DEF and sensor-related issues have been corrected. Since SCR catalysts rely on chemical activity, once they’re contaminated or heat-damaged, they cannot be restored to reliable operation.

You should replace your SCR when:

  • NOx efficiency fault codes keep returning
    • If you repeatedly get “SCR efficiency below threshold” or NOx conversion codes after repairs, the catalyst is likely degraded.
  • Derate/restricted mode happens repeatedly
    • Ongoing derate conditions are a strong sign the SCR is not meeting emissions requirements.
  • DEF contamination has occurred
    • Contaminated or incorrect DEF can poison the SCR catalyst permanently. Even after flushing the system, the SCR may remain ineffective.
  • DEF crystallization has caused restriction or internal damage
    • Heavy crystal buildup can block flow and damage the catalyst structure.
  • Excessive heat has damaged the catalyst
    • Prolonged high exhaust temperatures can crack or degrade the SCR substrate and reduce its chemical function.
  • Repairs to dosing components and sensors don’t solve the issue
    • If the DEF pump, doser/injector, lines, NOx sensors, and wiring are verified good but SCR faults continue, replacement becomes necessary.

Replace the SCR when it shows persistent efficiency faults, repeated derate conditions, or confirmed contamination/heat damage, especially after all upstream and DEF system issues have been corrected.

Yes, SCR module faults can trigger aftertreatment warning codes and alerts.

NOx sensors and temperature sensors monitor conditions around the SCR module to gauge conversion efficiency.

Yes, 5507928 is a genuine outlet catalyst module originally specified by Cummins.

Yes, the SCR module can typically be replaced on its own without swapping the entire emissions assembly.

Cummins SCRs

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