Cummins DEF Doser Injector 2021-2024: OEM 5633311
CUMMINS DEF DOSER INJECTOR 2021-2024: OEM 5633311
ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY
WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a New, Tamerx DEF Doser Injector, Tamerx part number 5633311TX ( OEM Part Number 5633311 ).This part is primarily made for a Cummins , production years 2021-2024, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
OEM NUMBERS
| Primary OEM | 5633311 |
| Additional OEM | 5633311 |
ADDITIONAL DETAILS
| CONDITION | New |
| UPC / Barcode | 00840490542075 |
| WEIGHT | 3.00 LBS |
SHIPPING OPTIONS
Ship Weight : 3.00 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"
Ensure accurate Diesel Exhaust Fluid delivery with the Cummins DEF Doser Injector 2021–2024, OEM Part Number 5633311. Designed for select late-model Cummins applications, this injector precisely meters DEF into the exhaust stream to support proper aftertreatment operation and emissions compliance. Manufactured to meet OEM specifications, it offers dependable fitment and consistent functionality under a variety of operating conditions. Symptoms of a failing DEF doser injector can include warning lights, fault codes, or improper DEF distribution, making timely replacement essential. Tamerx Diesel Products LLC provides trusted diesel components to help keep your Cummins engine operating cleanly and reliably.
FITMENT CHART
| YEAR | MAKE | ENGINE(S) | ||||
|---|---|---|---|---|---|---|
| 2021 | Cummins | |||||
| 2022 | Cummins | |||||
| 2023 | Cummins | |||||
| 2024 | Cummins | |||||
PEOPLE ALSO ASKS | BLOG(S)
The Cummins DEF Doser Injector OEM 5633311 is a precision emissions-control component used on Cummins engines built from 2021 through 2024. It is part of the engine’s Selective Catalytic Reduction (SCR) system, which reduces harmful nitrogen oxide (NOx) emissions in the exhaust.
This injector is designed to meter and spray Diesel Exhaust Fluid (DEF)—an aqueous urea solution—into the hot exhaust stream in carefully controlled amounts. When DEF is introduced into the exhaust, heat converts it into ammonia, which then reacts with NOx in the SCR catalyst to form harmless nitrogen and water.
Key points about the Cummins DEF Doser Injector OEM 5633311:
- Delivers precise quantities of DEF into the exhaust at the right time
- Works in coordination with the engine control module (ECM)
- Supports proper SCR catalyst function
- Helps meet emissions regulations by reducing NOx
- Engineered to Cummins factory specifications for 2021–2024 applications
By accurately dosing DEF, this injector ensures the SCR system can effectively lower NOx emissions while maintaining efficient, clean exhaust output.
The DEF doser injector plays a critical role in the SCR system by spraying Diesel Exhaust Fluid into the exhaust stream. Because it operates in high heat and handles fluid that can crystallize, proper care is essential to prevent premature failure.
The key is preventing contamination and crystallization.
To help prolong the lifespan of your DEF doser injector:
- Use fresh DEF that meets ISO 22241 standards
- Store DEF in sealed containers away from extreme temperatures
- Avoid letting the DEF tank run completely empty
- Address warning lights immediately
- Repair exhaust leaks promptly
- Ensure SCR sensors and related components are functioning properly
DEF can crystallize when exposed to air or high heat. Over time, buildup around the injector nozzle can restrict spray patterns and affect dosing accuracy.
Contaminated DEF is another common cause of blockage. Dirt or improper fluid mixtures can clog internal passages and strain the injector.
It is also important to maintain the entire aftertreatment system. Faulty temperature or NOx sensors can cause improper dosing cycles that place extra stress on the injector.
Routine inspections and early attention to minor issues can significantly extend the life of your DEF doser injector and help maintain consistent emissions system operation.
Typically no, but verifying proper system operation with a diagnostic tool after installation is recommended.
The Cummins 5633311 is specified for model years 2021 through 2024.
Yes, issues with the Cummins 5633311 can trigger SCR-related fault codes or emissions alerts.
Using the correct OEM 5633311 ensures accurate DEF delivery and consistent emissions system regulation.
Cummins DEF Doser Injectors
