Spartan Cummins ISX15, X15 DEF Head Unit
SPARTAN CUMMINS ISX15, X15 DEF HEAD UNIT
ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY
WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a Genuine New, Tamerx DEF Head Unit, Tamerx part number DM501-2206A765 ( OEM Part Number DM501-2206A765 ).This part is primarily made for a Cummins ISX15, X15, production years 2011-2020, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
Additional Notes: Gen 7
OEM NUMBERS
| Primary OEM | DM501-2206A765 |
| Additional OEM | DM501-2206A765 |
ADDITIONAL DETAILS
| CONDITION | Genuine New |
| UPC / Barcode | 00840490542501 |
| 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 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.
The Spartan Cummins ISX15, X15 DEF Head Unit OEM DM501-2206A765 is a genuine factory component designed to maintain proper Diesel Exhaust Fluid system function in Spartan vehicles powered by Cummins engines from 2011 to 2020. Built to strict OEM specifications, this unit ensures precise fitment and dependable performance in demanding applications. By keeping the DEF system operating correctly, it supports emissions compliance and helps maintain consistent engine reliability. Its rugged construction is engineered for durability, delivering long-term service life under heavy-duty conditions. For fleets and operators, this DEF head unit provides OEM-certified quality and trusted dependability.
FITMENT CHART
| YEAR | MAKE | ENGINE(S) | ||||
|---|---|---|---|---|---|---|
| 2011 | Cummins | ISX15 | X15 | |||
| 2012 | Cummins | ISX15 | X15 | |||
| 2013 | Cummins | ISX15 | X15 | |||
| 2014 | Cummins | ISX15 | X15 | |||
| 2015 | Cummins | ISX15 | X15 | |||
| 2016 | Cummins | ISX15 | X15 | |||
| 2017 | Cummins | ISX15 | X15 | |||
| 2018 | Cummins | ISX15 | X15 | |||
| 2019 | Cummins | ISX15 | X15 | |||
| 2020 | Cummins | ISX15 | X15 | |||
PEOPLE ALSO ASKS | BLOG(S)
Spartan chassis vehicles equipped with Cummins ISX15 and X15 engines rely on advanced emission systems to meet strict environmental standards. A central part of this system is the DEF (Diesel Exhaust Fluid) Head Unit, OEM DM501-2206A765. Mounted on the DEF tank, this multifunction component ensures proper fluid monitoring, flow, and protection for the SCR system.
Core Roles
- DEF Level Monitoring
- Tracks the amount of DEF in the tank and relays data to the engine control module (ECM), ensuring timely refills and preventing unexpected downtime.
- Temperature Management
- Monitors DEF temperature to prevent freezing in cold weather or overheating in extreme conditions. Many units integrate heating functions to keep the fluid within usable limits.
- Fluid Flow Control
- Provides the pickup port to deliver DEF to the dosing system and a return port to cycle unused fluid back into the tank.
- Filtration
- Built-in strainer prevents crystals, debris, or other contaminants from entering sensitive system components.
- Data Communication
- Sends real-time sensor information to the ECM so it can regulate dosing accurately and detect potential system faults.
The DEF Head Unit OEM DM501-2206A765 is essential for maintaining reliable operation and emissions compliance. By combining sensing, heating, filtration, and communication in a single assembly, it ensures Spartan vehicles with Cummins ISX15 and X15 engines operate efficiently, even in demanding conditions.
The DEF (Diesel Exhaust Fluid) head unit is responsible for monitoring fluid level, quality, and temperature. When it begins to fail, your vehicle will usually warn you before it goes into full derate mode. Recognizing these symptoms early can save you from costly downtime.
Common Symptoms of a Bad DEF Head Unit
Watch for these warning signs:
- DEF system fault codes
- displayed on your dashboard
- Check engine light
- triggered by emissions issues
- Incorrect DEF readings,
- such as showing empty when the tank is full
- Premature derate countdowns,
- restricting mileage and speed
- Vehicle entering limp mode,
- sometimes limiting you to 5 mph
- Inconsistent system warnings,
- with alerts appearing and disappearing
The DEF head unit contains sensors that report critical data to the engine control module. If these sensors fail, the system assumes the emissions equipment is not functioning correctly, which triggers warnings and driving restrictions to remain compliant.
A bad DEF head unit should never be ignored. If you see any of these symptoms, schedule service quickly to prevent being stranded by a truck locked in low-speed derate mode.
It ensures accurate DEF monitoring, which is critical for emissions compliance.
Yes, a failed unit may trigger derates that limit vehicle performance.
It sends signals for DEF level, quality, and temperature.
They use diagnostic tools to read fault codes and test sensor outputs.
Cummins DEF Head Units
