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Cummins ISB 6.7L SCR Outlet Catalyst Module 2018-2022: OEM 4394894

CUMMINS ISB 6.7L SCR OUTLET CATALYST MODULE 2018-2022: OEM 4394894

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$5,995.00

CORE CHARGE:

$1,000.00
iCORE DISCLAIMER: The CORE charge is a 30 day hold and will not be processed as long as the CORE is returned within 30 days. If you do not have a CORE or fail to return the CORE within 30 days, the CORE charge hold amount will be processed at that time.

AVAILABILITY IN STOCK
OEM NUMBER4394894
PART TYPESCR Outlet Catalyst Module
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEISB 6.7L
YEAR2018-2022
PART NUMBER102-0242RM-SCR
APPLICATION NOTESEPA17

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx SCR Outlet Catalyst Module, Tamerx part number 102-0242RM-SCR ( OEM Part Number 4394894 ). 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 ISB 6.7L, production years 2018-2022, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM4394894
Additional OEM4394894, A055R482

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490555822
WEIGHT53.00 LBS

SHIPPING OPTIONS

Ship Weight : 53.00 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.


Take control of your emissions system with the Cummins ISB 6.7L SCR Outlet Catalyst Module 2018–2022 (OEM 4394894). Designed specifically for Cummins ISB 6.7L engines, this module helps support efficient exhaust gas treatment during the final stage of the SCR process. Manufactured to meet OEM specifications, it delivers precise fitment and dependable compatibility across the listed model years. Installing the correct SCR outlet catalyst module helps maintain reliable emissions control, smooth aftertreatment operation, and long-lasting system performance.

FITMENT CHART

YEARMAKEENGINE(S)
2018Cummins ISB 6.7L
2019Cummins ISB 6.7L
2020Cummins ISB 6.7L
2021Cummins ISB 6.7L
2022Cummins ISB 6.7L

PEOPLE ALSO ASKS | BLOG(S)

The Cummins ISB 6.7L SCR Outlet Catalyst Module 2018-2022: OEM 4394894 is designed to serve as an integral part of the diesel exhaust aftertreatment system. Built for OEM compatibility, this outlet catalyst module is engineered to fit seamlessly with the factory SCR assembly, making it a dependable replacement for compatible Cummins ISB 6.7L applications.

  • OEM 4394894 designed specifically for Cummins ISB 6.7L engines from 2018-2022
  • Precision-engineered for factory-style fit and straightforward installation
  • Integrates with the original SCR exhaust aftertreatment system
  • Manufactured to OEM standards for reliable quality and compatibility
  • Rugged construction designed for demanding heavy-duty diesel environments
  • Ideal replacement for worn, damaged, or end-of-life SCR outlet catalyst modules

The Cummins ISB 6.7L SCR Outlet Catalyst Module OEM 4394894 is a quality replacement component for maintaining the original exhaust aftertreatment system configuration. Tamerx Diesel Parts offers trusted OEM-fit diesel emissions components that help keep compatible Cummins-powered trucks equipped with reliable replacement parts.

The SCR Outlet Catalyst Module plays a key role in monitoring the efficiency of the Selective Catalytic Reduction (SCR) system. It helps ensure nitrogen oxide (NOx) emissions are being properly reduced before exhaust gases leave the vehicle. If the module develops a fault or no longer functions correctly, the engine control module can detect the issue and illuminate the check engine light.

  • The check engine light may turn on if the module reports reduced SCR efficiency or abnormal operating conditions.
  • Fault codes related to catalyst performance, NOx reduction, or emissions control are commonly stored in the engine control module.
  • A faulty module can cause incorrect readings that affect Diesel Exhaust Fluid (DEF) dosing and overall SCR operation.
  • Emissions system warning messages may appear alongside the check engine light.
  • If the issue remains unresolved, the vehicle may enter reduced power or engine derate mode to maintain emissions compliance.
  • Problems with related components, such as NOx sensors, DEF injectors, or temperature sensors, can produce similar warning lights and should also be inspected.

A bad SCR Outlet Catalyst Module can certainly trigger a check engine light, but proper diagnostics are necessary to identify the exact cause. Addressing the problem promptly helps restore emissions system performance, prevent further damage, and keep the vehicle operating efficiently.

Yes, contaminated or incorrect Diesel Exhaust Fluid (DEF) can reduce SCR system efficiency. Using DEF that meets manufacturer specifications helps protect the catalyst.

Common signs include emissions warning lights, SCR fault codes, and reduced engine performance. Some vehicles may also enter an engine derate mode.

Yes, coolant or oil entering the exhaust stream can contaminate the catalyst. This contamination can reduce its ability to process exhaust gases effectively.

Technicians retrieve diagnostic trouble codes and monitor SCR system performance using scan tools. They also inspect related sensors, DEF components, and exhaust piping.

Cummins SCR Outlet Catalyst Modules