Cummins L9 SCR 2022-2024: OEM 5508188
CUMMINS L9 SCR 2022-2024: OEM 5508188
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 5508188RM-SCR-3 ( OEM Part Number 5508188 ). 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 | 5508188 |
| Additional OEM | 5508188 |
ADDITIONAL DETAILS
| CONDITION | Remanufactured |
| UPC / Barcode | 00840490549371 |
| 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 to support proper emissions control, the Cummins L9 SCR 2022–2024, OEM Part Number 5508188, fits select L9 engine applications as a critical selective catalytic reduction system component. This SCR unit helps reduce NOx emissions by working with Diesel Exhaust Fluid to treat exhaust gases before they exit the aftertreatment system. Manufactured to meet OEM specifications, it offers accurate fitment and durable construction for demanding commercial and vocational environments. When an SCR component becomes restricted or fails, it can trigger warning lights, increased exhaust temperatures, or other aftertreatment concerns, making timely replacement important. Tamerx Diesel Products LLC provides trusted diesel aftertreatment components designed to help keep your Cummins L9 engine operating cleanly and reliably.
FITMENT CHART
| YEAR | MAKE | ENGINE(S) | ||||
|---|---|---|---|---|---|---|
| 2022 | Cummins | L9 | ||||
| 2023 | Cummins | L9 | ||||
| 2024 | Cummins | L9 | ||||
PEOPLE ALSO ASKS | BLOG(S)
The Cummins L9 SCR (Selective Catalytic Reduction) unit OEM 5508188 is a core emissions aftertreatment component that reduces nitrogen oxide (NOx) emissions in the exhaust. While it’s supplied as a single assembly, it contains several internal and external elements that work together to facilitate chemical conversion and integrate with the engine’s exhaust system.
Primary SCR Components
- SCR Housing
- A sturdy metal casing that protects internal elements and attaches the unit to the exhaust system.
- Catalyst Substrate
- A honeycomb-style internal core made from ceramic or metallic material. This substrate provides a large surface area for chemical reactions.
- Catalyst Coating
- Precious metals or tailored catalyst materials are applied to the substrate surfaces. These materials promote the chemical reactions that convert NOx into nitrogen and water.
- Inlet/Outlet Cones
- Internal portions that guide exhaust gases smoothly into and out of the catalyst substrate.
Supporting & Sealing Elements
- Gaskets and Seals
- Heat-resistant seals that prevent leaks where the SCR unit connects to adjacent exhaust components.
- Mounting Flanges
- Machined surfaces and attachment points that secure the SCR unit within the exhaust system.
Sensor and Monitoring Interfaces
Many SCR systems include ports or mounts for monitoring equipment:
- NOx Sensor Ports
- Positions where NOx sensors can be installed to measure emissions before and/or after the SCR catalyst.
- Temperature Sensor Ports
- Locations for temperature probes to monitor exhaust heat and support control logic for DEF dosing and regeneration.
How These Components Work Together
Exhaust gases from the engine flow into the SCR housing and through the catalyst substrate. Diesel Exhaust Fluid (DEF) is injected upstream and converted into ammonia. As ammonia and exhaust gases contact the catalyst coating on the substrate, a chemical reaction occurs that converts NOx into harmless nitrogen and water vapor. Gaskets, mounting flanges, and sensor ports help integrate the SCR unit into the wider aftertreatment system and support feedback to the engine control module (ECM).
Together, these components enable the Cummins L9 SCR OEM 5508188 to effectively reduce NOx emissions, support regulatory compliance, and help maintain stable and clean exhaust output in 2022–2024 applications.
The SCR (Selective Catalytic Reduction) system reduces NOx emissions by injecting Diesel Exhaust Fluid into the exhaust stream. When the system begins to fail, you’ll often see warning indicators and changes in engine operation.
One of the most common signs is an illuminated check engine or SCR warning light.
Other symptoms of a bad SCR system include:
- NOx efficiency fault codes
- Reduced engine operation or speed limitation
- Increased DEF consumption
- Failed emissions testing
- Strong ammonia-like exhaust odor
- Persistent aftertreatment fault messages
If the SCR catalyst is not functioning properly, the vehicle may enter a countdown mode that limits speed until repairs are made.
In some cases, faulty NOx sensors, DEF contamination, or a malfunctioning doser injector can trigger similar symptoms. That’s why proper diagnostics are essential before replacing components.
Prolonged overheating or contamination can damage the internal catalyst substrate, reducing its ability to convert emissions effectively.
If you notice warning lights or drivability changes related to the emissions system, a professional inspection can confirm whether the SCR catalyst or a related component is the source of the problem.
Common indications include emissions-related diagnostic codes or SCR system alerts from the engine control module.
Yes — issues with the SCR Filter can trigger diagnostic trouble codes and emissions system warnings.
Yes, professional installation and diagnostics are recommended to ensure proper mounting, sensor connections, and system communication.
Using the correct OEM 5508188 SCR Filter helps maintain proper NOx reduction and supports compliance with emissions requirements.
Cummins SCRs
Product OEM 5418490
