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Cummins ISL, 8.9L SCR Outlet Catalyst Module 2014-2018: OEM 4353844

CUMMINS ISL, 8.9L SCR OUTLET CATALYST MODULE 2014-2018: OEM 4353844

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 NUMBER4353844
PART TYPESCR Outlet Catalyst Module
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEISL, 8.9L
YEAR2014-2018
PART NUMBER4353844RM-SCR
APPLICATION NOTESTier 4

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx SCR Outlet Catalyst Module, Tamerx part number 4353844RM-SCR ( OEM Part Number 4353844 ). 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 ISL, 8.9L, production years 2014-2018, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM4353844
Additional OEM4353844

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490556126
WEIGHT92.00 LBS

SHIPPING OPTIONS

Ship Weight : 92.00 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 dependable emissions performance, the Cummins ISL, 8.9L SCR Outlet Catalyst Module 2014–2018 (OEM 4353844) plays a critical role in the final stage of the SCR aftertreatment system. Engineered for Cummins ISL 8.9L applications, this module helps optimize exhaust gas treatment for efficient emissions control. Manufactured to meet OEM specifications, it offers precise fitment and reliable compatibility across the listed model years. Installing the correct SCR outlet catalyst module helps maintain smooth aftertreatment operation and dependable long-term performance.

FITMENT CHART

YEARMAKEENGINE(S)
2014Cummins ISL 8.9L
2015Cummins ISL 8.9L
2016Cummins ISL 8.9L
2017Cummins ISL 8.9L
2018Cummins ISL 8.9L

PEOPLE ALSO ASKS | BLOG(S)

The Cummins ISL Fuel Injector Line 2011-2016: OEM 5525526 is a critical fuel system component that transfers high-pressure fuel from the fuel rail to the injector. Designed to meet OEM specifications, this injector line helps ensure a secure connection and reliable fuel delivery for Cummins ISL engines.

  • OEM 5525526 fits Cummins ISL engines from 2011-2016
  • Transfers high-pressure fuel directly to the fuel injector
  • Precision-manufactured for accurate routing and secure connections
  • Built to OEM specifications for proper fit and compatibility
  • Durable steel construction designed to withstand high fuel system pressures
  • Ideal replacement for cracked, leaking, or damaged injector lines

The Cummins ISL Fuel Injector Line OEM 5525526 is a dependable replacement part for maintaining the integrity of the fuel delivery system. Tamerx Diesel Parts offers quality OEM-fit fuel system components trusted by diesel truck owners and service professionals for reliable repairs and long-lasting performance.

The SCR Outlet Catalyst Module is an essential part of the Selective Catalytic Reduction (SCR) system, helping ensure nitrogen oxide (NOx) emissions are properly reduced before exhaust gases exit the vehicle. Whether the module can be cleaned or must be replaced depends on the type of contamination and the extent of the damage. A proper diagnosis is always the first step before making a repair decision.

  • Light external contamination or buildup on related components may be cleaned during routine maintenance.
  • DEF crystallization affecting nearby injectors or piping can often be removed without replacing the catalyst module itself.
  • Oil or coolant contamination that reaches the catalyst can permanently reduce its efficiency, making replacement the more reliable solution.
  • Internal damage such as a cracked or melted catalyst substrate cannot be repaired through cleaning.
  • Persistent catalyst efficiency fault codes after all related components have been repaired may indicate the module has reached the end of its service life.
  • Professional inspection can determine whether the issue is caused by the outlet module or by another SCR component, such as a NOx sensor or DEF injector.

Cleaning may be an option for certain external issues, but it cannot restore a catalyst that has been internally damaged or contaminated. Proper diagnostics help determine whether cleaning is sufficient or if replacing the SCR Outlet Catalyst Module is the best long-term solution.

Yes, excessive soot from engine problems can reduce catalyst performance. Correcting the source of the soot helps extend component life.

Common causes include overheating, contamination, excessive soot, and long-term wear. Engine or DEF system problems may also contribute to premature failure.

Yes, SCR system failures can cause the ECM to reduce engine power. This helps maintain emissions compliance until repairs are completed.

Technicians use diagnostic software to retrieve fault codes and monitor SCR system performance. They also inspect related sensors and exhaust components.

Cummins SCR Outlet Catalyst Modules