Cummins ISB 6.7L Decomposition Reactor Tube 2014-2017: OEM 5271590
CUMMINS ISB 6.7L DECOMPOSITION REACTOR TUBE 2014-2017: OEM 5271590
ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY
WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a Remanufactured Tamerx Decomposition Reactor Tube, Tamerx part number 5271590RM-DECOMP ( OEM Part Number 5271590 ). 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 ISB 6.7L, production years 2014-2017, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
OEM NUMBERS
| Primary OEM | 5271590 |
| Additional OEM | 5271590, A032W351 |
ADDITIONAL DETAILS
| CONDITION | Remanufactured |
| UPC / Barcode | 00840490556492 |
| WEIGHT | 23.00 LBS |
SHIPPING OPTIONS
Ship Weight : 23.00 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.
Positioned within the exhaust aftertreatment system, the Cummins ISB 6.7L Decomposition Reactor Tube (2014–2017) OEM 5271590 helps prepare diesel exhaust fluid (DEF) for the selective catalytic reduction process. Manufactured to original equipment specifications, it provides accurate fitment for Cummins ISB 6.7L engines within the specified model years. This reactor tube promotes proper DEF decomposition and mixing with exhaust gases, helping the SCR system reduce nitrogen oxide (NOx) emissions. Its durable construction is designed to handle elevated exhaust temperatures, vibration, and demanding conditions commonly encountered in heavy-duty diesel applications. Suitable for fleet maintenance and professional diesel service, this OEM decomposition reactor tube helps maintain proper aftertreatment operation and dependable long-term service.
FITMENT CHART
| YEAR | MAKE | ENGINE(S) | ||||
|---|---|---|---|---|---|---|
| 2014 | Cummins | ISB 6.7L | ||||
| 2015 | Cummins | ISB 6.7L | ||||
| 2016 | Cummins | ISB 6.7L | ||||
| 2017 | Cummins | ISB 6.7L | ||||
PEOPLE ALSO ASKS | BLOG(S)
The Cummins ISX15 Decomposition Reactor Tube (OEM 5271590) is an essential component of the engine's aftertreatment system because it prepares Diesel Exhaust Fluid (DEF) for the Selective Catalytic Reduction (SCR) process. Designed for 2011–2017 ISX15 engines, this reactor tube helps ensure DEF mixes properly with the exhaust stream before reaching the SCR catalyst, allowing the emissions system to operate efficiently.
Although it isn't as visible as components like the DPF or SCR catalyst, the decomposition reactor tube plays a critical role in reducing harmful emissions and maintaining aftertreatment performance.
Why is the Cummins 5271590 Decomposition Reactor Tube important?
- Promotes proper DEF decomposition
- The reactor tube provides the environment needed for DEF to vaporize and break down into ammonia, which is required for the SCR process.
- Ensures thorough DEF and exhaust mixing
- Its internal design helps create a uniform mixture of DEF and exhaust gases before they enter the SCR catalyst.
- Supports effective NOx reduction
- Proper DEF distribution allows the SCR system to convert harmful nitrogen oxides (NOx) into nitrogen and water vapor more efficiently.
- Helps prevent DEF crystallization
- By encouraging proper atomization and mixing, the reactor tube reduces the likelihood of DEF deposits forming inside the exhaust system.
- Contributes to reliable aftertreatment performance
- Consistent DEF delivery and mixing help the entire emissions system operate as designed.
- Supports emissions compliance
- A properly functioning decomposition reactor tube helps the engine meet modern diesel emissions standards by enabling efficient SCR operation.
Think of the Cummins 5271590 Decomposition Reactor Tube as the preparation chamber for the SCR system. Before harmful NOx emissions can be converted into harmless nitrogen and water vapor, DEF must be properly mixed and decomposed. This reactor tube makes that possible, helping the aftertreatment system operate efficiently while supporting cleaner exhaust and dependable engine performance.
You may be able to continue driving with a failing decomposition reactor tube for a short period, but it's not recommended to delay repairs. The decomposition reactor tube is responsible for helping convert Diesel Exhaust Fluid (DEF) into ammonia before it reaches the SCR catalyst. If it isn't functioning properly, the SCR system cannot effectively reduce NOx emissions.
Although the vehicle may remain drivable initially, continuing to operate it with a failing decomposition reactor tube can lead to additional emissions system problems and increased repair costs.
Here are some of the risks of continuing to drive:
- SCR system warning lights and fault codes
- A failing reactor tube can trigger diagnostic trouble codes related to the DEF dosing system, SCR efficiency, or emissions performance.
- Reduced SCR system efficiency
- Improper DEF decomposition can prevent the SCR catalyst from effectively reducing NOx emissions, causing the system to operate below its intended efficiency.
- Engine derate or limited operating mode
- Many diesel engines are programmed to reduce engine output or limit vehicle speed when SCR-related faults remain unresolved.
- DEF crystallization and deposit buildup
- A damaged or restricted reactor tube can cause DEF to crystallize, creating deposits that may affect the injector, SCR catalyst, and other aftertreatment components.
- Additional strain on the emissions system
- Continuing to drive with an unresolved issue can place extra stress on the DEF injector, NOx sensors, SCR catalyst, and related components, increasing the likelihood of further repairs.
- Failed emissions inspections
- A malfunctioning decomposition reactor tube can prevent the SCR system from operating correctly, potentially causing the vehicle to fail emissions testing.
Driving a short distance to reach a repair facility is generally acceptable, but prolonged operation with a failing decomposition reactor tube is not recommended. Diagnosing and repairing the issue early can help prevent damage to other aftertreatment components, reduce downtime, and keep your emissions system operating as intended.
The OEM 5271590 Decomposition Reactor Tube provides the controlled environment where Diesel Exhaust Fluid (DEF) begins to decompose into ammonia before the exhaust gases enter the SCR catalyst, supporting effective NOx reduction.
The 5271590 reactor tube is designed for Cummins ISB 6.7L engines manufactured between 2014 and 2017 and used in heavy-duty on-highway truck applications.
The decomposition reactor tube is installed in the exhaust system between the DEF dosing injector and the SCR catalyst, where DEF has time to vaporize and decompose before reaching the catalyst.
The reactor tube allows injected DEF to properly convert into ammonia, which is required for the SCR catalyst to effectively reduce nitrogen oxide (NOx) emissions.
Cummins Decomposition Reactor Tubes
