Cummins QSB 6.7L SCR Outlet Catalyst Module 2014-2021: OEM 4328918
CUMMINS QSB 6.7L SCR OUTLET CATALYST MODULE 2014-2021: OEM 4328918
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 4328918RM-SCR ( OEM Part Number 4328918 ).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 | 4328918 |
| Additional OEM | 4328918 |
ADDITIONAL DETAILS
| CONDITION | Remanufactured |
| UPC / Barcode | 00840490557031 |
| 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.
Helping complete the exhaust treatment process, the Cummins QSB 6.7L SCR Outlet Catalyst Module (2014–2021) OEM 4328918 is an important part of the engine’s emissions system. Manufactured according to original equipment specifications, it provides accurate fitment for Cummins QSB 6.7L engines within the specified model years. This module processes exhaust gases through the selective catalytic reduction system, helping reduce nitrogen oxide (NOx) emissions before they exit the exhaust. Its rugged construction is designed to tolerate elevated temperatures, vibration, and challenging conditions commonly encountered in diesel equipment applications. Suitable for equipment owners, technicians, and maintenance professionals, this OEM SCR outlet catalyst module helps preserve proper aftertreatment functionality and dependable long-term service.
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 SCR Outlet Catalyst Module (OEM 4328918) is an important part of the engine’s exhaust aftertreatment system. Its primary role is to help reduce harmful nitrogen oxide (NOx) emissions through Selective Catalytic Reduction (SCR). In this process, Diesel Exhaust Fluid (DEF) helps create the chemical reaction needed to convert NOx into less harmful substances.
Why Is the SCR Outlet Catalyst Module Important?
- Reduces harmful NOx emissions
- The catalyst provides the surface needed for chemical reactions that convert nitrogen oxides into primarily nitrogen and water vapor.
- Works with the DEF system
- DEF is introduced upstream in the exhaust system. As it breaks down, it produces ammonia that reacts with NOx inside the SCR catalyst.
- Supports emissions compliance
- Effective NOx reduction helps properly equipped QSB 6.7L engines operate within applicable diesel emissions requirements.
- Completes an important stage of exhaust treatment
- The SCR catalyst treats NOx after the exhaust has passed through other stages of the aftertreatment system.
- Works alongside sensors and electronic controls
- NOx and temperature sensors provide information that allows the engine control system to monitor SCR performance and detect potential problems.
- Supports dependable engine operation
- A properly functioning catalyst can help prevent SCR efficiency faults, emissions warnings, and potential engine derates associated with aftertreatment problems.
More Than Just an Exhaust Component
The Cummins QSB 6.7L SCR Outlet Catalyst Module (OEM 4328918) is a crucial part of maintaining clean and controlled exhaust emissions. By working with DEF and other aftertreatment components, it helps reduce NOx, supports emissions-system efficiency, and contributes to dependable operation of compatible Cummins QSB 6.7L engines.
Your vehicle may continue to run with a failing SCR Outlet Catalyst Module, but driving for an extended period is not recommended. The module is an important part of the Selective Catalytic Reduction (SCR) system, which reduces nitrogen oxide (NOx) emissions from diesel exhaust.
A developing SCR fault may initially cause little change in how the engine feels. However, if the problem remains unresolved, the engine management system may eventually restrict vehicle operation.
Here are some potential consequences of continuing to drive:
- Check engine and emissions warning lights
- A loss of SCR efficiency can trigger diagnostic trouble codes and dashboard warnings.
- Engine derate
- Depending on the engine and severity of the fault, the control system may limit engine power or vehicle speed until the emissions problem is corrected.
- Higher NOx emissions
- A deteriorated catalyst may no longer convert NOx efficiently, preventing the aftertreatment system from operating as designed.
- Recurring SCR faults
- Catalyst-efficiency codes may continue to return until the underlying problem is properly diagnosed and repaired.
- Additional aftertreatment problems
- Problems involving DEF dosing, NOx sensors, exhaust leaks, or contamination can worsen if the underlying cause is ignored.
- Unexpected downtime
- What begins as a warning light can eventually become a derate or operating restriction, potentially taking the vehicle out of service.
If you only need to travel a short distance to a repair facility and the vehicle is otherwise operating normally, that may be possible depending on the specific fault. However, do not continue driving if you experience a severe derate, abnormal exhaust temperatures, heavy smoke, or other serious symptoms.
Have the entire SCR system diagnosed before replacing the outlet catalyst module. A faulty NOx sensor, DEF dosing problem, contaminated DEF, or exhaust leak can sometimes produce symptoms that resemble catalyst failure.
Yes. Coolant entering the exhaust stream can contaminate or damage aftertreatment catalysts.
Technicians should check for housing damage, cracks, damaged mounting points, excessive deposits, signs of overheating, and internal substrate deterioration.
The DEF doser, NOx sensors, exhaust temperature sensors, wiring, clamps, gaskets, adjoining exhaust pipes, and upstream aftertreatment components should all be inspected.
Yes. Excessive oil entering the exhaust can contaminate the catalyst substrate and reduce its effectiveness.
Cummins SCR Outlet Catalyst Modules
