Cummins ISL SCR Outlet Catalyst Module 2018-2022: OEM 5418527
CUMMINS ISL SCR OUTLET CATALYST MODULE 2018-2022: OEM 5418527
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 5418527RM-SCR ( OEM Part Number 5418527 ). 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, production years 2018-2022, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
OEM NUMBERS
| Primary OEM | 5418527 |
| Additional OEM | 4394924, 5418527 |
ADDITIONAL DETAILS
| CONDITION | Remanufactured |
| UPC / Barcode | 00840490556850 |
| WEIGHT | 78.00 LBS |
SHIPPING OPTIONS
Ship Weight : 78.00 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 reliable exhaust aftertreatment operation, the Cummins ISL SCR Outlet Catalyst Module (2018–2022) OEM 5418527 is an essential component for maintaining proper emissions system functionality. Manufactured to meet original equipment specifications, it ensures precise compatibility with Cummins ISL engines across the specified model years. This SCR outlet catalyst module serves as the final stage of the selective catalytic reduction system, helping reduce nitrogen oxide (NOx) emissions before exhaust gases exit the system while supporting compliance with emissions standards. Constructed from durable, high-quality materials, it is engineered to withstand extreme exhaust temperatures and the demanding conditions of heavy-duty diesel applications. Ideal for fleet operators, technicians, and maintenance professionals, this OEM SCR outlet catalyst module helps maintain dependable aftertreatment system operation and long-term reliability.
FITMENT CHART
| YEAR | MAKE | ENGINE(S) | ||||
|---|---|---|---|---|---|---|
| 2018 | Cummins | ISL | ||||
| 2019 | Cummins | ISL | ||||
| 2020 | Cummins | ISL | ||||
| 2021 | Cummins | ISL | ||||
| 2022 | Cummins | ISL | ||||
PEOPLE ALSO ASKS | BLOG(S)
The Cummins ISL SCR Outlet Catalyst Module (OEM 5418527) is a vital aftertreatment component designed for 2018–2022 Cummins ISL engines. Installed near the end of the exhaust system, this Selective Catalytic Reduction (SCR) Outlet Catalyst Module is responsible for reducing harmful nitrogen oxide (NOx) emissions after Diesel Exhaust Fluid (DEF) has been introduced into the exhaust stream. Working alongside the Diesel Oxidation Catalyst (DOC), Diesel Particulate Filter (DPF), and DEF system, it helps ensure the engine meets modern emissions standards.
Unlike a DPF, which captures soot, the SCR Outlet Catalyst Module uses a catalyst to trigger a chemical reaction that transforms NOx into environmentally safe gases.
What Does the Cummins 5418527 SCR Outlet Catalyst Module Do?
- Reduces nitrogen oxide (NOx) emissions
- The catalyst converts harmful NOx gases into harmless nitrogen and water vapor through a reaction with ammonia produced from DEF.
- Completes the exhaust treatment process
- Positioned at the outlet of the SCR system, it performs one of the final stages of emissions control before exhaust gases leave the vehicle.
- Works with the DEF system
- The module depends on accurately injected DEF to create the chemical reaction necessary for effective NOx reduction.
- Supports the complete aftertreatment system
- It operates together with the DOC, DPF, NOx sensors, temperature sensors, and the Engine Control Module (ECM) to maintain efficient emissions control.
- Maintains proper exhaust flow
- Its design allows treated exhaust gases to move smoothly through the final stage of the aftertreatment system.
- Helps maintain emissions compliance
- A properly functioning SCR Outlet Catalyst Module is essential for meeting diesel emissions regulations and supporting reliable engine operation.
The Cummins ISL SCR Outlet Catalyst Module (OEM 5418527) serves as the final emissions-cleaning stage in the aftertreatment system. By converting harmful NOx emissions into harmless nitrogen and water vapor, it helps the engine produce cleaner exhaust, supports the efficiency of the complete emissions system, and contributes to the long-term reliability of compatible Cummins ISL engines.
An SCR Outlet Catalyst Module is responsible for helping the Selective Catalytic Reduction (SCR) system reduce nitrogen oxide (NOx) emissions. As the module begins to fail, it can affect the efficiency of the entire aftertreatment system, leading to warning lights, reduced engine operation, and recurring emissions problems.
Recognizing the symptoms early can help prevent additional damage and unnecessary downtime.
Here are the most common signs of a bad SCR Outlet Catalyst Module:
- Check engine light
- One of the earliest signs is an illuminated check engine light caused by emissions-related faults detected by the engine control module.
- Recurring SCR efficiency fault codes
- Diagnostic trouble codes related to SCR efficiency, catalyst performance, or NOx conversion may continue to return even after clearing the codes.
- Engine derate or reduced-power mode
- Many diesel engines automatically limit engine output when the SCR system detects a significant fault to protect the emissions system.
- Higher DEF consumption
- A failing catalyst module may cause the system to use more Diesel Exhaust Fluid (DEF) as it attempts to maintain proper emissions control.
- Failed emissions inspections
- If the catalyst can no longer effectively reduce NOx emissions, the vehicle or equipment may fail emissions testing.
- Visible damage or excessive contamination
- Cracks, corrosion, impact damage, or contamination from soot, oil, or DEF deposits can reduce the module's effectiveness.
- Persistent SCR system issues
- If NOx sensors, DEF injectors, and other SCR components have been inspected or replaced but the same problems continue, the SCR Outlet Catalyst Module may be the source of the issue.
If you notice these warning signs, it's important to inspect the entire aftertreatment system rather than replacing parts individually. Diagnosing the root cause early can help restore proper emissions system operation, reduce repair costs, and prevent additional damage to related components.
The 5418527 module is designed for Cummins ISL engines used in compatible heavy-duty truck, bus, and vocational vehicle applications manufactured between 2018 and 2022. Engine serial number (ESN) verification is recommended before installation.
The SCR Outlet Catalyst Module is installed downstream of the Diesel Particulate Filter (DPF) in the aftertreatment system, where exhaust gases are treated after DEF has been injected.
Its primary function is to facilitate the chemical reaction that converts harmful NOx emissions into harmless nitrogen and water vapor, significantly reducing diesel exhaust emissions.
Yes. The SCR catalyst depends on properly metered Diesel Exhaust Fluid (DEF) to generate ammonia, which reacts with NOx inside the catalyst to reduce emissions.
Cummins SCR Outlet Catalyst Modules
