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Cummins B6.7, L9 SCR 2018-2021: OEM 5418508

CUMMINS B6.7, L9 SCR 2018-2021: OEM 5418508

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$4,995.00

AVAILABILITY IN STOCK
OEM NUMBER5418508
PART TYPESCR
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEB6.7, L9
YEAR2018-2021
PART NUMBER102-0320RM-SCR
APPLICATION NOTESNavistar, 200-320, EPA17

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx SCR, Tamerx part number 102-0320RM-SCR ( OEM Part Number 5418508 ). 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 B6.7, L9, production years 2018-2021, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM5418508
Additional OEM5418508

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490551794
WEIGHT50.00 LBS

SHIPPING OPTIONS

Ship Weight : 50.00 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.


Kick your emissions control into high gear with the Cummins B6.7/L9 SCR 2018–2021: OEM 5418508, engineered for seamless performance and cleaner exhaust. This genuine SCR unit effectively lowers NOx output while maintaining the efficiency your B6.7 and L9 engines demand. Built to strict OEM standards, it ensures a smooth fit and long-lasting durability for busy roadwork and heavy-duty applications. Trust a part that helps keep your truck running greener and stronger on every haul.

FITMENT CHART

YEARMAKEENGINE(S)
2018Cummins B6.7 L9
2019Cummins B6.7 L9
2020Cummins B6.7 L9
2021Cummins B6.7 L9

PEOPLE ALSO ASKS | BLOG(S)

Keeping your diesel truck’s emission aftertreatment system in proper operating condition is crucial for meeting regulatory standards and maintaining trouble-free service. The Cummins B6.7, L9 SCR 2018–2021: OEM 5418508 is a central component in your Selective Catalytic Reduction (SCR) system that helps reduce harmful nitrogen oxides (NOx) from engine exhaust. Knowing how this SCR unit works and why the correct replacement matters can help you protect your investment and ensure your vehicle stays compliant and reliable on the road.

  • Designed specifically for Cummins B6.7 and L9 engines from 2018 to 2021, the OEM 5418508 SCR unit is engineered for a precise fit with your emission aftertreatment system.

  • The SCR (Selective Catalytic Reduction) process uses diesel exhaust fluid (DEF) injected into the exhaust stream to trigger a reaction that breaks down NOx into harmless nitrogen and water vapor.

  • Choosing the genuine OEM 5418508 SCR ensures proper compatibility with your engine’s emission controls, helping reduce the chances of diagnostic fault codes and service warnings tied to the SCR system.

  • A well-functioning SCR module helps maintain accurate DEF dosing, which supports consistent NOx reduction and helps prevent unnecessary DEF waste.

  • Replacing worn or malfunctioning SCR components with the correct OEM unit helps your truck avoid emission system alerts or potential engine derates that can lead to downtime.

  • Built to meet Cummins’ original manufacturing standards, this SCR module offers durability to withstand the heat, vibration, and rugged conditions of everyday highway and regional trucking.

  • Installation is straightforward, making it practical for service technicians and fleet maintenance teams to replace during routine emission system servicing or part upgrades.

  • Proper SCR maintenance plays a part in keeping your truck operating in compliance with emission regulations, while also supporting the long-term health of the overall aftertreatment system.

Choosing the Cummins B6.7, L9 SCR 2018–2021: OEM 5418508 from Tamerx Diesel Parts means equipping your vehicle with an emission control component designed for your engine’s exact requirements. Timely replacement of critical parts like this SCR unit helps maintain cleaner exhaust output, reduce emission-related issues, and supports dependable operation mile after mile.

The Selective Catalytic Reduction (SCR) system relies on Diesel Exhaust Fluid (DEF) to reduce nitrogen oxide (NOx) emissions in diesel engines. Because DEF is a mixture of urea and deionized water, it has a freezing point of approximately 12°F (-11°C). This often raises concerns about whether the SCR system can freeze in cold weather and how it affects vehicle operation.

  • DEF can freeze in low temperatures, but modern SCR systems are designed with built-in heaters in the DEF tank, lines, and injector to thaw the fluid quickly.

  • When DEF is frozen at startup, the engine can still run normally for a short period. The system will begin dosing once the fluid has thawed to the proper temperature.

  • Repeated exposure to extreme cold without proper system function can lead to DEF crystallization in certain components if there are existing issues.

  • A malfunctioning DEF heater or temperature sensor may trigger warning lights during cold weather operation.

  • Storing DEF properly and keeping the vehicle maintained helps reduce cold-weather-related problems.

While DEF can freeze, SCR systems are engineered to handle cold conditions. Ensuring the DEF heating system is functioning correctly and addressing warning lights promptly will help maintain reliable emissions control even in freezing temperatures.

The Cummins B6.7, L9 SCR 2018-2021: OEM 5418508 actively treats NOx gases to help meet strict environmental regulations. Proper SCR performance is essential for regulated exhaust output.

Regular inspection can catch buildup, clogging, or sensor faults before they lead to bigger problems with the Cummins B6.7, L9 SCR 2018-2021: OEM 5418508. Early detection helps prevent costly repairs and unexpected failures.

A restricted Cummins B6.7, L9 SCR 2018-2021: OEM 5418508 can disrupt exhaust flow and reduce treatment efficiency. This often results in warning codes and diminished system performance.

Yes, problems with the Cummins B6.7, L9 SCR 2018-2021: OEM 5418508 can cause the engine control system to limit power output. This protective derate helps prevent further emissions system issues until the fault is fixed.

Cummins SCRs