
Cummins QSB 6.7L SCR Outlet Catalyst Module 2014-2021: OEM 5306682
CUMMINS QSB 6.7L SCR OUTLET CATALYST MODULE 2014-2021: OEM 5306682

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a Remanufactured Tamerx SCR Outlet Catalyst Module, Tamerx part number 5306682RM-SCR ( OEM Part Number 5306682 ). 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 QSB 6.7L, production years 2014-2021, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
OEM NUMBERS
| Primary OEM | 5306682 |
| Additional OEM | 5306682 |
ADDITIONAL DETAILS
| CONDITION | Remanufactured |
| UPC / Barcode | 00840490557109 |
| WEIGHT | 88.00 LBS |
SHIPPING OPTIONS
Ship Weight : 88.00 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.
Functioning as an important part of the exhaust treatment process, the Cummins QSB 6.7L SCR Outlet Catalyst Module (2014–2021) OEM 5306682 helps control emissions produced during diesel engine operation. Manufactured according to original equipment specifications, it provides accurate fitment for Cummins QSB 6.7L engines within the specified model years. This module supports the selective catalytic reduction system by helping convert nitrogen oxide (NOx) emissions into less harmful compounds before exhaust gases are released. Its durable construction is suited for prolonged exposure to high exhaust temperatures, vibration, and challenging operating environments. Suitable for equipment maintenance and professional diesel service, this OEM SCR outlet catalyst module helps preserve proper aftertreatment function and dependable long-term operation.
FITMENT CHART
| YEAR | MAKE | ENGINE(S) | ||||
|---|---|---|---|---|---|---|
| 2014 | Cummins | QSB 6.7L | ||||
| 2015 | Cummins | QSB 6.7L | ||||
| 2016 | Cummins | QSB 6.7L | ||||
| 2017 | Cummins | QSB 6.7L | ||||
| 2018 | Cummins | QSB 6.7L | ||||
| 2019 | Cummins | QSB 6.7L | ||||
| 2020 | Cummins | QSB 6.7L | ||||
| 2021 | Cummins | QSB 6.7L | ||||
PEOPLE ALSO ASKS | BLOG(S)
The Cummins QSB 6.7L Aftertreatment Device (OEM 5306682) is an emissions-control component used with compatible Cummins QSB 6.7L engines. Its purpose is to treat diesel exhaust before it is released from the system, helping reduce pollutants and maintain proper emissions performance.
One important detail is that OEM 5306682 is commonly identified as a Cummins “Aftertreatment Device,” and some listings describe it as a DPF/DOC assembly rather than specifically an SCR outlet catalyst. Because of this, exact configuration and fitment should be confirmed using the engine serial number before replacement.
What Does the Cummins 5306682 Aftertreatment Device Do?
- Treats engine exhaust
- The assembly helps remove or chemically convert pollutants produced during diesel combustion.
- Supports particulate control
- When configured with a Diesel Particulate Filter (DPF), the unit captures soot from the exhaust stream and holds it until regeneration can burn much of the accumulated material away.
- Supports oxidation of exhaust pollutants
- A Diesel Oxidation Catalyst (DOC) helps convert carbon monoxide and unburned hydrocarbons into less harmful compounds.
- Works with emissions sensors
- Temperature, pressure, and NOx sensors may work with the aftertreatment assembly to provide information to the engine control system.
- Supports regeneration
- Proper exhaust temperatures and catalyst operation help the DPF complete regeneration and manage accumulated soot.
- Helps maintain emissions compliance
- By treating exhaust pollutants, the aftertreatment device helps compatible QSB 6.7L engines maintain their intended emissions performance.
The Cummins QSB 6.7L Aftertreatment Device (OEM 5306682) is a major part of keeping diesel exhaust clean and controlled. Proper operation helps manage soot and other pollutants while supporting dependable engine and emissions-system performance.
For OEM 5306682, it is particularly important to verify the exact application before describing or purchasing it specifically as an SCR Outlet Catalyst Module, since available parts information more broadly classifies it as an aftertreatment device and identifies DPF/DOC configurations for ISB/QSB 6.7L applications.
An SCR Outlet Catalyst Module is designed to withstand high exhaust temperatures and demanding operating conditions, but it can deteriorate over time. In many cases, premature failure is caused by contamination, excessive heat, improper DEF dosing, or an underlying engine problem rather than normal wear alone.
Here are some of the most common causes of SCR Outlet Catalyst Module failure:
- Contaminated or incorrect DEF
- Poor-quality, diluted, or contaminated Diesel Exhaust Fluid can interfere with the SCR reaction and contribute to deposits or catalyst damage.
- Improper DEF dosing
- A malfunctioning DEF injector or dosing system can supply too much or too little DEF, reducing NOx conversion and potentially creating deposits inside the aftertreatment system.
- Oil or coolant contamination
- Engine oil or coolant entering the exhaust can coat or chemically damage the catalyst material, reducing its ability to treat exhaust gases.
- Excessive exhaust temperatures
- Repeated overheating can damage or melt the internal catalyst substrate, especially when other engine or aftertreatment problems are present.
- Soot and deposit buildup
- Excessive soot production or DEF crystallization can restrict exhaust flow and interfere with proper catalyst operation.
- Engine-related problems
- Faulty fuel injectors, turbocharger issues, EGR problems, or excessive oil consumption can change exhaust conditions and shorten catalyst life.
- Physical damage and vibration
- Impacts, loose mounting hardware, severe vibration, or corrosion can damage the housing or internal catalyst structure.
- Normal catalyst deterioration
Over a long service life, repeated heat cycles and chemical exposure can gradually reduce the catalyst's ability to convert NOx efficiently.
If your SCR Outlet Catalyst Module has failed, it's important to determine why it failed before installing a replacement. Correcting problems with DEF dosing, engine operation, contamination, or other aftertreatment components can help prevent the new catalyst module from suffering the same premature failure.
The 5306682 OEM number, Engine Serial Number (ESN), equipment application, and existing aftertreatment configuration should be matched before ordering to confirm correct fitment.
No, the type and severity of the deposits and the condition of the internal aftertreatment components should be diagnosed before determining whether 5306682 requires replacement.
Yes, misaligned exhaust piping can place mechanical stress on the 5306682 housing, connections, and mounting hardware.
Upstream fueling, turbocharger, EGR, or combustion problems can overload an aftertreatment device and potentially shorten the service life of a replacement 5306682.















