
Cummins ISX12G Aftertreatment Device 2010-2017: OEM 5304054
CUMMINS ISX12G AFTERTREATMENT DEVICE 2010-2017: OEM 5304054

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a Remanufactured Tamerx Aftertreatment Device, Tamerx part number 5304054RM-CNG ( OEM Part Number 5304054 ). 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 ISX12G, production years 2010-2017, and comes with a One Million Miles or One Year Warranty.
Additional Notes: CNG Catalyst Module
OEM NUMBERS
| Primary OEM | 5304054 |
| Additional OEM | 5304054, A042R789 |
ADDITIONAL DETAILS
| CONDITION | Remanufactured |
| UPC / Barcode | 00840490558762 |
| WEIGHT | 45.00 LBS |
SHIPPING OPTIONS
Ship Weight : 45.00 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 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, 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 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.
Developed to support proper exhaust emissions management in heavy-duty natural gas engine applications, the Cummins ISX12G Aftertreatment Device (2010–2017) OEM 5304054 plays an important role in maintaining reliable exhaust system operation. Designed according to original equipment specifications, this aftertreatment device is intended for proper fitment with applicable Cummins ISX12G engines within the specified model years. It works within the exhaust treatment system to help reduce harmful emissions produced during combustion, supporting cleaner exhaust output and proper emissions control. Its durable construction is designed to withstand elevated exhaust temperatures, vibration, continuous operation, and demanding conditions commonly encountered in commercial trucks and heavy-duty vehicles. Suitable for fleet operators, maintenance technicians, and professional engine repair facilities, this OEM aftertreatment device provides a dependable replacement solution for maintaining proper exhaust treatment, consistent emissions system functionality, and reliable long-term engine operation.
FITMENT CHART
| YEAR | MAKE | ENGINE(S) | ||||
|---|---|---|---|---|---|---|
| 2010 | Cummins | ISX12G | ||||
| 2011 | Cummins | ISX12G | ||||
| 2012 | Cummins | ISX12G | ||||
| 2013 | Cummins | ISX12G | ||||
| 2014 | Cummins | ISX12G | ||||
| 2015 | Cummins | ISX12G | ||||
| 2016 | Cummins | ISX12G | ||||
| 2017 | Cummins | ISX12G | ||||
PEOPLE ALSO ASKS | BLOG(S)
The Cummins ISX12G Aftertreatment Device OEM 5304054 is an important component of the exhaust emission control system in compatible Cummins natural gas engines. Proper maintenance helps reduce harmful emissions, prevent costly repairs, and maintain reliable engine operation.
Essential Maintenance Tips for Your Cummins Aftertreatment Device
Keeping your Cummins ISX12G Aftertreatment Device in good condition requires regular inspections and proper maintenance practices.
- Inspect Exhaust Connections
- Check for leaks, corrosion, loose fittings, and visible damage.
- Monitor Warning Lights
- Address engine fault codes and emission system alerts promptly.
- Maintain Ignition Components
- Follow recommended spark plug and ignition system service intervals.
- Use Approved Engine Fluids
- Follow Cummins specifications for engine oil and other service fluids.
- Prevent Contamination
- Keep oil, coolant, and foreign materials from entering the exhaust system.
- Follow Service Guidelines
- Avoid unauthorized cleaning or modifications to the catalyst assembly.
Why Is Regular Aftertreatment Maintenance Important?
Proper care of the Cummins ISX12G Aftertreatment Device 2010–2017 helps maintain effective exhaust treatment and compliance with applicable emission standards.
A damaged or contaminated aftertreatment device may cause increased emissions, diagnostic trouble codes, and expensive repairs.
Always verify OEM 5304054 compatibility using your engine serial number before purchasing a replacement.
An Aftertreatment Device is an essential component of a diesel vehicle's exhaust system. It helps reduce harmful emissions and maintain compliance with environmental regulations. Understanding the lifespan of a diesel aftertreatment device can help prevent unexpected repairs and costly replacements.
How Long Does an Aftertreatment Device Last?
The lifespan of an exhaust aftertreatment device depends on its type, vehicle usage, maintenance, and operating conditions. Many diesel aftertreatment components can last several hundred thousand miles when properly maintained.
Factors That Affect Aftertreatment Device Lifespan
Several factors can influence how long your diesel emissions system lasts:
- Regular Maintenance
- Following manufacturer service schedules helps prevent premature wear.
- Fuel Quality
- Using recommended diesel fuel reduces contamination risks.
- Proper DEF Usage
- Quality Diesel Exhaust Fluid supports SCR system operation.
- Driving Conditions
- Frequent short trips may interfere with DPF regeneration.
- Exhaust Temperature
- Excessive heat can damage sensitive catalyst components.
- Timely Repairs
- Addressing warning lights helps prevent additional system damage.
When Should You Replace an Aftertreatment Device?
Common warning signs include increased exhaust emissions, frequent DPF regeneration, diagnostic trouble codes, and reduced engine output.
If you suspect aftertreatment device failure, consult a qualified diesel technician. Regular inspections and proper maintenance can extend component life, reduce repair expenses, and maintain emissions compliance.
Yes, excessive engine oil entering the exhaust stream can leave deposits that interfere with the operation of catalyst surfaces inside the device, where applicable.
Yes, damaged internal material or accumulated deposits can obstruct exhaust passages and increase restriction through the 5304054.
Cracked connections, damaged sealing surfaces, corrosion, or improper alignment can cause exhaust leaks and interfere with proper installation.
Yes, misfires can allow unburned fuel to enter the exhaust system and create abnormal temperatures that may damage catalyst components.





