
Cummins L9 SCR 2022-2024: OEM 5418145
CUMMINS L9 SCR 2022-2024: OEM 5418145

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 5418145RM-SCR-3 ( OEM Part Number 5418145 ). 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, 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 | 5418145 |
| Additional OEM | 5418145 |
ADDITIONAL DETAILS
| CONDITION | Remanufactured |
| UPC / Barcode | 00840490552234 |
| 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.
Designed specifically for Cummins L9 engines manufactured between 2022 and 2024, OEM 5418145 is a selective catalytic reduction component used within the exhaust aftertreatment system. This SCR unit is built to meet OEM specifications, ensuring accurate fitment and seamless integration with factory-installed components. It is constructed from durable materials to handle the high-temperature conditions common in heavy-duty diesel applications. The component supports consistent aftertreatment operation and emissions system reliability. It is well suited for fleet service and targeted repairs where dependable emissions control is required.
FITMENT CHART
| YEAR | MAKE | ENGINE(S) | ||||
|---|---|---|---|---|---|---|
| 2022 | Cummins | L9 | ||||
| 2023 | Cummins | L9 | ||||
| 2024 | Cummins | L9 | ||||
PEOPLE ALSO ASKS | BLOG(S)
For fleets running Cummins L9 engines, the SCR system is not just an emissions requirement—it is a safeguard against operational disruption. The Cummins L9 SCR 2022–2024, OEM 5418145, serves as a core part of the exhaust aftertreatment process, ensuring vehicles can remain compliant while continuing to operate reliably in demanding environments.
This SCR unit is responsible for treating exhaust gases after Diesel Exhaust Fluid has been introduced earlier in the system. As exhaust flows through the catalyst, nitrogen oxide emissions are chemically processed into nitrogen and water vapor before exiting the tailpipe. This step is essential for meeting modern emissions regulations and avoiding compliance-related penalties.
OEM 5418145 is designed specifically for 2022–2024 Cummins L9 applications, making it well-suited for fleet vehicles that operate on fixed routes, vocational jobs, or regional schedules. Its consistent operation helps fleets avoid interruptions tied to emissions system issues.
For fleet managers, the importance of this SCR component shows up in several key areas:
- Supporting emissions compliance across multiple vehicles
- Reducing the likelihood of derates and dashboard alerts
- Helping maintain consistent exhaust treatment day after day
- Limiting downtime caused by aftertreatment system failures
By keeping the Cummins L9 SCR OEM 5418145 in proper working condition, fleets can protect uptime, maintain regulatory alignment, and keep vehicles moving without unnecessary interruptions.
The main cause of SCR (Selective Catalytic Reduction) failure is poor-quality or contaminated Diesel Exhaust Fluid (DEF). SCR systems depend on precise chemical reactions to reduce nitrogen oxide (NOx) emissions, and when DEF is contaminated, degraded, or incorrectly formulated, that process is disrupted.
DEF contamination commonly occurs due to improper storage, exposure to heat or sunlight, use of non-certified fluid, or accidental mixing with water, fuel, coolant, or dirt. Even small amounts of contamination can cause DEF crystallization, leading to clogged injectors, restricted dosing, and reduced ammonia delivery to the SCR catalyst. Over time, this results in low NOx conversion efficiency and recurring emissions fault codes.
While DEF issues are the leading cause, SCR failures are often accelerated by unresolved upstream engine and emissions problems. The most common contributing factors include:
- Contaminated or incorrect DEF fluid
- DEF crystallization blocking the dosing injector
- Faulty NOx or exhaust temperature sensors
- Excessive oil consumption or coolant intrusion
- Overheating caused by failed regeneration events
In most cases, the SCR catalyst does not fail from normal wear. Instead, it becomes poisoned or thermally damaged due to underlying issues that were not corrected in time. Proper DEF handling, early diagnostics, and timely repair of engine and emissions components are essential to preventing SCR failure and avoiding costly system replacement.
It is suitable for heavy-duty trucking and commercial applications equipped with the compatible L9 engine.
Yes, it works together with other aftertreatment components like the particulate filter to complete emissions control.
It is engineered to maintain proper exhaust routing as part of the factory-designed system.
Yes, confirming correct sensor connections is essential for maintaining accurate emissions monitoring.

































