Cummins X15 DEF Doser Injector 2024-2027: OEM 5511172
CUMMINS X15 DEF DOSER INJECTOR 2024-2027: OEM 5511172
ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY
WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a Genuine Cummins DEF Doser Injector, Cummins part number 5511172 ( OEM Part Number 5511172 ). 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 X15, production years 2024-2027, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
Additional Notes: EPA24
OEM NUMBERS
| Primary OEM | 5511172 |
| Additional OEM | 5511172 |
ADDITIONAL DETAILS
| CONDITION | Genuine |
| UPC / Barcode | 00840490534230 |
| WEIGHT | 12.00 LBS |
SHIPPING OPTIONS
Ship Weight : 12.00 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.
Engineered for Cummins X15 engines from model years 2024–2027, OEM 5511172 is a DEF doser injector designed to precisely deliver Diesel Exhaust Fluid into the SCR aftertreatment system. This component is manufactured to OEM specifications to ensure accurate fitment and compatibility with the factory dosing and exhaust assemblies. Built from durable materials, it is suited for the operating conditions common in modern heavy-duty diesel applications. The doser injector supports controlled DEF delivery to help maintain emissions control effectiveness. It is a reliable choice for fleet maintenance and targeted repair needs requiring consistent aftertreatment system operation.
FITMENT CHART
| YEAR | MAKE | ENGINE(S) | ||||
|---|---|---|---|---|---|---|
| 2024 | Cummins | X15 | ||||
| 2025 | Cummins | X15 | ||||
| 2026 | Cummins | X15 | ||||
| 2027 | Cummins | X15 | ||||
PEOPLE ALSO ASKS | BLOG(S)
The main role of the Cummins X15 DEF Doser Injector 2024–2027: OEM 5511172 is to precisely inject Diesel Exhaust Fluid (DEF) into the exhaust stream as part of the engine’s Selective Catalytic Reduction (SCR) system.
This component is responsible for delivering a carefully measured amount of DEF at the correct time and spray pattern. Once injected into the hot exhaust gases, the DEF breaks down into ammonia. That ammonia is then used inside the SCR catalyst to chemically convert nitrogen oxide (NOx) emissions into nitrogen and water vapor before the exhaust exits the vehicle.
Because emissions standards remain strict for 2024–2027 model years, the DEF doser injector plays a critical role in ensuring proper exhaust treatment. The engine control module continuously monitors exhaust conditions and adjusts the doser injector’s operation to maintain accurate DEF delivery under varying loads and driving conditions.
The primary responsibilities of OEM 5511172 include:
- Metering precise amounts of DEF into the exhaust stream
- Ensuring proper atomization for effective chemical reaction
- Supporting NOx reduction within the SCR system
- Helping prevent emissions-related fault codes or derates
In short, the Cummins X15 DEF Doser Injector is essential for maintaining emissions compliance, supporting reliable SCR operation, and ensuring the engine operates within regulatory standards for 2024–2027 applications.
A bad DEF doser injector can cause SCR efficiency problems, increased emissions, and engine derates if not addressed quickly. The DEF doser injector is responsible for precisely spraying Diesel Exhaust Fluid into the exhaust stream to reduce NOx emissions. When it fails, the SCR system cannot function properly.
One of the earliest signs is an illuminated check engine or SCR warning light. You may also notice reduced DEF consumption or inconsistent dosing performance. If the injector becomes clogged with crystallized DEF, it may restrict flow or spray improperly, leading to poor NOx conversion.
Midway through diagnosis, the most common signs of a failing DEF doser injector include:
- Persistent SCR efficiency or NOx conversion fault codes
- Low or high DEF pressure/delivery codes
- Engine derate or countdown warnings
- DEF crystallization buildup around the injector tip
- Abnormally low or excessive DEF consumption
- Failed SCR or dosing system self-tests
In more advanced cases, a stuck-open injector can over-dose DEF, causing ammonia slip or white residue at the exhaust outlet. A restricted or stuck-closed injector can prevent proper dosing altogether, triggering emissions faults.
Before replacing the injector, verify DEF quality, check for line blockages, and confirm proper pump pressure. Early diagnosis and cleaning, when possible, can prevent damage to the SCR catalyst and avoid more expensive repairs.
Yes, malfunction or clogging in the DEF doser injector can lead to emissions-related diagnostic trouble codes.
Yes, it interfaces with the engine control module and DEF system sensors for proper dosing feedback.
Heavy-duty trucks and commercial vehicles equipped with Cummins X15 engines from 2024–2027 use this doser injector.
Yes, a diagnostic scan is typically recommended after replacement to confirm proper DEF system integration.
Cummins DEF Doser Injectors
