Cummins QSX15 Decomposition Reactor Tube 2018-2022: OEM 5508332
CUMMINS QSX15 DECOMPOSITION REACTOR TUBE 2018-2022: OEM 5508332
ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY
WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a New Tamerx Decomposition Reactor Tube, Tamerx part number 5508332-OE ( OEM Part Number 5508332 ). 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 QSX15, production years 2018-2022, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
Additional Notes: Decompositio Reactor
OEM NUMBERS
| Primary OEM | 5508332 |
| Additional OEM | 5508332 |
ADDITIONAL DETAILS
| CONDITION | New |
| UPC / Barcode | 00840490554016 |
| WEIGHT | 35.00 LBS |
SHIPPING OPTIONS
Ship Weight : 35.00 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.
"This Product Doesn't Have a Core"
Engineered for proper exhaust aftertreatment function, the Cummins QSX15 Decomposition Reactor Tube (2018–2022) OEM 5508332 is a critical component within the SCR system. Designed to meet original equipment specifications, it ensures precise compatibility with Cummins QSX15 engines across the specified model years. This reactor tube facilitates the decomposition of diesel exhaust fluid (DEF), supporting effective reduction of nitrogen oxide (NOx) emissions. Constructed from durable, high-quality materials, it is built to withstand high temperatures and demanding diesel operating conditions. Ideal for technicians and fleet maintenance professionals, this OEM component helps maintain consistent emissions system operation and long-term reliability.
FITMENT CHART
| YEAR | MAKE | ENGINE(S) | ||||
|---|---|---|---|---|---|---|
| 2018 | Cummins | QSX15 | ||||
| 2019 | Cummins | QSX15 | ||||
| 2020 | Cummins | QSX15 | ||||
| 2021 | Cummins | QSX15 | ||||
| 2022 | Cummins | QSX15 | ||||
PEOPLE ALSO ASKS | BLOG(S)
The Cummins QSX15 Decomposition Reactor Tube (OEM 5508332) is an essential component within the SCR aftertreatment system, playing a key role in preparing exhaust gases for proper emissions treatment. Designed for 2018–2022 engines, it helps ensure that the SCR process operates efficiently and consistently.
This component is responsible for managing how Diesel Exhaust Fluid (DEF) is introduced and broken down before it reaches the SCR catalyst. Without this step, the chemical reaction needed to reduce emissions would not occur effectively.
Here’s why the decomposition reactor tube is so important:
- Facilitates proper DEF breakdown
- The tube helps convert DEF into ammonia, which is the active substance needed for the SCR system to reduce nitrogen oxides (NOx).
- Ensures even distribution of DEF in the exhaust stream
- It promotes proper mixing of DEF with exhaust gases, allowing for a more complete and efficient reaction downstream.
- Supports effective NOx reduction
- By preparing the DEF correctly, it enables the SCR catalyst to convert harmful emissions into nitrogen and water vapor.
- Prevents crystallization and buildup
- Proper decomposition reduces the risk of DEF deposits forming inside the exhaust system, which can lead to blockages or reduced efficiency.
- Maintains overall aftertreatment system balance
- It works in coordination with injectors, sensors, and the SCR catalyst to ensure the entire system operates smoothly.
- Helps avoid system faults and downtime
- If the decomposition process is not functioning correctly, it can trigger fault codes or limit engine operation.
In simple terms, the Cummins 5508332 decomposition reactor tube acts as a preparation chamber for DEF, ensuring it is properly converted and mixed so the SCR system can effectively reduce emissions and keep the engine running within required standards.
Decomposition reactor tubes play a critical role in breaking down Diesel Exhaust Fluid (DEF) into usable gases for emissions control. The most common cause of failure is crystallization and deposit buildup inside the tube, which restricts flow and disrupts proper operation.
When DEF does not fully vaporize—often due to low temperatures or poor system conditions—it can leave behind solid deposits. Over time, these deposits harden and block the tube, leading to reduced efficiency or complete failure.
Several factors contribute to this issue:
- DEF crystallization
- Incomplete decomposition of DEF can leave behind solid crystals that accumulate inside the tube and restrict flow.
- Low operating temperatures
- If the system doesn’t reach the required heat levels, DEF may not fully convert, increasing the risk of buildup.
- Poor DEF quality
- Contaminated or low-grade fluid can introduce impurities that accelerate deposit formation.
- Injector or dosing issues
- Incorrect DEF injection can cause uneven distribution, leading to localized buildup within the tube.
- Lack of routine maintenance
- Without regular inspection, small deposits can grow into major blockages that affect overall system function.
Understanding these causes helps with early detection and prevention. Keeping the system clean and operating under proper conditions can reduce the risk of decomposition reactor tube failure.
If it fails, DEF may not fully convert into ammonia, leading to increased emissions, system faults, and possible engine derate conditions.
It provides a controlled environment where DEF can evenly mix with hot exhaust gases before reaching the SCR catalyst, improving system efficiency.
Typical signs include SCR system warnings, increased emissions levels, visible DEF crystallization, or fault codes related to the aftertreatment system.
Yes, it is built to OEM specifications, allowing it to fit directly into compatible exhaust systems without modification.
Cummins Decomposition Reactor Tubes
