
Cummins 8.9L Aftertreatment Device 2015-2024: OEM 5306789
CUMMINS 8.9L AFTERTREATMENT DEVICE 2015-2024: OEM 5306789

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 5306789RM-ATD ( OEM Part Number 5306789 ).This part is primarily made for a Cummins 8.9L, production years 2015-2024, and comes with a One Million Miles or One Year Warranty.
OEM NUMBERS
| Primary OEM | 5306789 |
| Additional OEM | 5306789, A043A459 |
ADDITIONAL DETAILS
| CONDITION | Remanufactured |
| UPC / Barcode | 00840490558816 |
| WEIGHT | 4.00 LBS |
SHIPPING OPTIONS
Ship Weight : 4.00 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.
Manage diesel exhaust emissions with this Cummins 8.9L Aftertreatment Device for 2015–2024 applications. OEM 5306789 helps process exhaust gases to reduce harmful pollutants and ensure proper emissions system operation. A dependable replacement for damaged, restricted, or failing aftertreatment devices in compatible Cummins 8.9L engines.
FITMENT CHART
| YEAR | MAKE | ENGINE(S) | ||||
|---|---|---|---|---|---|---|
| 2015 | Cummins | 8.9L | ||||
| 2016 | Cummins | 8.9L | ||||
| 2017 | Cummins | 8.9L | ||||
| 2018 | Cummins | 8.9L | ||||
| 2019 | Cummins | 8.9L | ||||
| 2020 | Cummins | 8.9L | ||||
| 2021 | Cummins | 8.9L | ||||
| 2022 | Cummins | 8.9L | ||||
| 2023 | Cummins | 8.9L | ||||
| 2024 | Cummins | 8.9L | ||||
PEOPLE ALSO ASKS | BLOG(S)
Regeneration and ash cleaning serve different purposes in diesel exhaust aftertreatment maintenance. For owners considering the Cummins 8.9L Aftertreatment Device 2015–2024, OEM 5306789, understanding this difference helps guide service decisions before purchasing replacement parts.
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Regeneration addresses soot: In systems equipped with a diesel particulate filter (DPF), regeneration uses heat to oxidize accumulated soot and help restore exhaust flow.
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Ash requires separate cleaning: Noncombustible ash remains in the filter after regeneration and must be removed through an approved cleaning process.
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Repeated regeneration requests need diagnosis: Frequent requests can indicate an underlying issue. Checking filter loading, sensor readings, and engine condition helps identify the cause.
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Service intervals depend on the application: Follow the engine manufacturer’s maintenance schedule rather than assuming every aftertreatment assembly needs cleaning at the same mileage.
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Component condition guides replacement: Cleaning may address accumulated material, while cracked filter elements or damaged catalyst components require a different repair decision.
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Correct assembly identification matters: Match OEM 5306789, the engine serial number, and the existing exhaust configuration to confirm the replacement device contains the components your application requires.
Understanding what regeneration can remove helps customers plan aftertreatment maintenance more effectively. When selecting the Cummins 8.9L Aftertreatment Device from TamerX Diesel Parts, confirm compatibility and the diagnosed service need before ordering.
Damage to an Aftertreatment Device can trigger a check engine light when the Engine Control Module (ECM) detects abnormal exhaust conditions or reduced emissions system efficiency. Since diesel aftertreatment devices help control harmful exhaust pollutants, physical damage, internal restrictions, or component deterioration can interfere with normal system operation and generate diagnostic trouble codes.
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Reduced emissions efficiency: A damaged Aftertreatment Device may fail to process exhaust pollutants effectively, triggering emissions-related fault codes and warning lights.
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Excessive exhaust backpressure: Internal blockages, collapsed catalyst material, or accumulated deposits can restrict exhaust flow and contribute to abnormal pressure readings.
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Damaged internal components: Cracked, melted, or deteriorated catalyst and filter materials can affect exhaust treatment and lead to diagnostic faults.
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Exhaust leaks: Cracks, damaged connections, or failing gaskets can allow exhaust gases to escape, potentially affecting sensor readings and aftertreatment operation.
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Abnormal exhaust temperatures: Damaged or restricted components may contribute to unexpected temperature readings that trigger aftertreatment-related warnings.
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DPF regeneration problems: Certain aftertreatment faults can interfere with Diesel Particulate Filter (DPF) regeneration, resulting in recurring fault codes and check engine light activation.
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Sensor-related issues: Faulty pressure sensors, temperature sensors, or NOx sensors can detect abnormal conditions or produce misleading readings that resemble Aftertreatment Device failure.
A damaged Aftertreatment Device can activate the check engine light and contribute to additional emissions system warnings or engine derate conditions. Reviewing diagnostic trouble codes, checking exhaust pressure and temperature readings, and inspecting connected components can help identify the actual problem and determine whether repair or replacement is necessary.
A partial blockage can increase exhaust backpressure and restrict normal gas flow. This may contribute to reduced engine responsiveness, increased exhaust temperatures, or emissions-related fault codes.
Corrosion may result from prolonged exposure to moisture, road chemicals, and changing exhaust temperatures. Severe corrosion can weaken the housing or exhaust connections and increase the risk of leaks.
The aftertreatment device does not directly regulate engine idle speed. However, severe exhaust restrictions or related engine control faults may contribute to unstable operation.
Neglected fuel system problems, excessive oil consumption, and unresolved combustion issues can increase contaminants entering the exhaust system. These conditions may accelerate deposits and deterioration within aftertreatment components.





