Cummins L9, B6.7 SCR 2022-2024: OEM 5418491
CUMMINS L9, B6.7 SCR 2022-2024: OEM 5418491
ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY
WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a Remanufactured Tamerx SCR, Tamerx part number 5418491RM-SCR ( OEM Part Number 5418491 ). 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 L9, B6.7, production years 2022-2024, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
OEM NUMBERS
| Primary OEM | 5418491 |
| Additional OEM | 5418491 |
ADDITIONAL DETAILS
| CONDITION | Remanufactured |
| UPC / Barcode | 00840490552364 |
| WEIGHT | 75.00 LBS |
SHIPPING OPTIONS
Ship Weight : 75.00 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.
Built for 2022–2024 Cummins L9 and B6.7 diesel platforms, the SCR unit with OEM 5418491 is a key component of the exhaust aftertreatment system. This selective catalytic reduction module is engineered to match the exhaust layout and emissions sensor locations specific to both L9 and B6.7 engines, ensuring proper integration with factory diesel exhaust fluid (DEF) delivery and control systems. Its role is to work with DEF to help reduce nitrogen oxide (NOₓ) emissions in the exhaust stream, supporting compliance with applicable emissions standards across these model years. Reliable SCR operation helps maintain consistent exhaust flow and contributes to the effective performance of downstream aftertreatment components. This page provides application-focused details to assist with identifying the Cummins L9 & B6.7 SCR 2022–2024 (OEM 5418491) for service and replacement needs.
FITMENT CHART
| YEAR | MAKE | ENGINE(S) | ||||
|---|---|---|---|---|---|---|
| 2022 | Cummins | L9 | B6.7 | |||
| 2023 | Cummins | L9 | B6.7 | |||
| 2024 | Cummins | L9 | B6.7 | |||
PEOPLE ALSO ASKS | BLOG(S)
The Cummins L9 / B6.7 SCR, OEM 5418491, functions as a core part of the engine’s Selective Catalytic Reduction (SCR) aftertreatment system for 2022–2024 applications. Its primary function is to reduce nitrogen oxide (NOx) emissions in the exhaust stream before the exhaust exits the vehicle or equipment.
This SCR unit does not capture soot like a DPF. Instead, it enables a chemical conversion process designed specifically for NOx reduction. The system injects Diesel Exhaust Fluid (DEF) into the exhaust upstream of the SCR unit. When DEF mixes with hot exhaust gases, it breaks down into ammonia.
Inside the SCR catalyst (OEM 5418491), ammonia reacts with NOx and converts it into:
- Nitrogen (N₂)
- Water vapor (H₂O)
These byproducts are naturally occurring and far less harmful than NOx emissions.
What OEM 5418491 does in the system
- Converts NOx emissions into safer exhaust gases
- Works with DEF dosing to treat exhaust efficiently
- Supports emissions compliance for 2022–2024 Cummins L9 and B6.7 engines
- Helps prevent SCR-related fault codes and reduced-operation conditions
- Maintains stable aftertreatment system performance
The Cummins SCR (OEM 5418491) is essential for emissions control, enabling effective NOx reduction and reliable aftertreatment operation on Cummins L9 and B6.7 engines.
You can prolong the lifespan of an SCR (Selective Catalytic Reduction) system by keeping the DEF system clean, preventing crystallization, and maintaining proper exhaust operating conditions. Because the SCR relies on chemical reactions to reduce NOx, protecting the catalyst surface is the key to long service life.
Best ways to extend SCR lifespan
- Use only high-quality DEF
- Always use DEF that meets ISO standards and comes from sealed containers. Poor-quality DEF introduces minerals that permanently damage the SCR catalyst.
- Prevent DEF contamination
- Never mix DEF with water, fuel, coolant, or additives. Even small contamination can poison the catalyst and trigger efficiency faults.
- Store DEF properly
- Keep DEF sealed in a clean, cool environment. Heat and dirt degrade DEF quality and increase deposit formation.
- Avoid DEF crystallization
- Crystals form when DEF dries in the doser/injector or exhaust piping. Make sure the injector isn’t leaking and system heaters function correctly.
- Fix DEF dosing issues early
- A weak DEF pump, clogged injector, failing doser valve, or damaged heated lines can cause under- or over-dosing, accelerating SCR failure.
- Maintain proper exhaust temperatures
- Frequent short trips keep exhaust too cool for proper SCR operation and increase deposits. Regular steady driving helps keep the system in the correct range.
- Keep upstream emissions components healthy
- DOC or DPF issues can affect exhaust flow and temperature, placing extra strain on the SCR and shortening its lifespan.
An SCR lasts longest when DEF quality is protected, crystallization is prevented, dosing stays accurate, and upstream exhaust components remain in good condition.
It provides a catalyst surface where Diesel Exhaust Fluid (DEF) reacts with exhaust gases to help reduce nitrogen oxides.
It is installed in the aftertreatment section of the exhaust system downstream of the DEF injection point.
Diesel Exhaust Fluid (DEF) is metered into the exhaust to interact with the SCR catalyst surface.
Yes, it supports reduction of regulated nitrogen oxides in the exhaust to assist meeting emissions requirements.
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