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Cummins L9 SCR 2022-2024: OEM 5508188

CUMMINS L9 SCR 2022-2024: OEM 5508188

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$6,995.00

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 NUMBER5508188
PART TYPESCR
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEL9
YEAR2022-2024
PART NUMBER5508188RM-SCR-5
APPLICATION NOTESSunny D 370-450 EPA21

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx SCR, Tamerx part number 5508188RM-SCR-5 ( 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 OEM5508188
Additional OEM5508188

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490549395
WEIGHT75.00 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.


Supporting emissions regulation on select Cummins L9 engines, the Cummins L9 SCR 2022–2024, OEM Part Number 5508188, is engineered as a key selective catalytic reduction component. This SCR unit works in tandem with Diesel Exhaust Fluid to help lower NOx emissions before exhaust gases exit the aftertreatment system. Built to meet OEM specifications, it provides precise fitment and durable construction for demanding commercial and vocational use. When an SCR component becomes restricted or fails, it can trigger warning lights, elevated exhaust temperatures, or other aftertreatment concerns, making timely replacement important. Tamerx Diesel Products LLC supplies trusted diesel aftertreatment components to help keep your Cummins L9 engine operating cleanly and reliably.

FITMENT CHART

YEARMAKEENGINE(S)
2022Cummins L9
2023Cummins L9
2024Cummins L9

PEOPLE ALSO ASKS | BLOG(S)

The Cummins L9 SCR OEM 5508188 is part of the Selective Catalytic Reduction system designed to reduce nitrogen oxide (NOx) emissions in 2022–2024 Cummins L9 engines. It works by using Diesel Exhaust Fluid (DEF) and a catalyst to chemically convert harmful exhaust gases into harmless compounds.

The SCR process begins after exhaust gases leave the engine and pass through upstream aftertreatment components.

Here’s how the system works step by step:

  • The engine produces exhaust gases containing NOx
  • DEF is injected into the exhaust stream upstream of the SCR unit
  • Exhaust heat converts DEF into ammonia
  • The exhaust-ammonia mixture enters the SCR housing
  • Gases pass through a catalyst-coated honeycomb substrate
  • Ammonia reacts with NOx on the catalyst surface
  • NOx is converted into nitrogen and water vapor

Inside the SCR unit is a ceramic or metallic honeycomb substrate coated with catalytic materials. This coating accelerates the chemical reaction between ammonia and NOx, allowing the conversion to occur efficiently within the exhaust flow.

The engine control module (ECM) continuously monitors NOx sensors and temperature sensors. Based on this data, it adjusts DEF dosing to maintain effective NOx reduction while avoiding over-injection.

Proper exhaust temperature is important for the SCR process to function efficiently. The system works in coordination with other aftertreatment components to maintain the right operating conditions.

When functioning correctly, the Cummins L9 SCR OEM 5508188 helps ensure emissions compliance, maintain clean exhaust output, and support dependable engine operation.

The SCR (Selective Catalytic Reduction) system reduces NOx emissions by injecting Diesel Exhaust Fluid into the exhaust stream. While it is designed for long-term durability, replacement is based on condition rather than mileage.

You should replace your SCR catalyst when diagnostics confirm it can no longer convert emissions efficiently.

Common signs it may be time for replacement include:

  • Persistent NOx efficiency fault codes
  • Ongoing SCR or check engine warning light
  • Failed emissions testing
  • Reduced engine operation or speed limitation
  • Confirmed internal catalyst damage
  • Repeated faults after repairing related components

Before replacing the SCR, it’s important to rule out supporting issues. Faulty NOx sensors, DEF contamination, or a malfunctioning doser injector can trigger similar fault codes.

A professional inspection typically includes:

  • Reviewing NOx sensor data
  • Verifying proper DEF dosing
  • Checking for exhaust leaks
  • Inspecting temperature readings

If the internal catalyst substrate is cracked, melted, or severely contaminated, cleaning is usually not effective and replacement is required.

Replacing a failing SCR promptly helps restore proper emissions control and prevents further strain on the aftertreatment system.

Yes, it is designed to work with the engine’s original NOx and temperature sensors for accurate emissions monitoring.

Yes, professional installation is recommended to ensure proper mounting, sensor connections, and exhaust routing.

Using the correct OEM part helps ensure the emissions system functions as intended and maintains regulatory compliance.

The SCR module helps convert nitrogen oxides (NOx) in the exhaust into less harmful nitrogen and water before release.

Cummins SCRs