CUMMINS DEF HEAD UNIT : OEM ASP5310-6606718
ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY
WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a Remanufactured, DuraWRX DEF Head Unit, DuraWRX part number ASP5310-6606718 ( OEM Part Number ASP5310-6606718 ). This part is primarily made for a Cummins , and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
Additional Notes: DEF Header, 40 MICRON, 18"
OEM NUMBERS
| Primary OEM | ASP5310-6606718 |
| Additional OEM | 5011806, 10019935, 10027844, 10035950, 10056545, ASP5310-6606718 |
ADDITIONAL DETAILS
| CONDITION | New |
| UPC / Barcode | |
| 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.
"This Product Doesn't Have a Core"
Specifically designed for Cummins emissions systems, the OEM ASP5310-6606718 DEF Head Unit provides accurate monitoring of diesel exhaust fluid levels and temperature. Its direct-fit construction allows for smooth installation into the DEF tank without any modifications. This component supports essential communication with the engine’s control module, helping to maintain proper system function and emissions compliance. It’s a dependable choice for replacing malfunctioning units or addressing DEF-related service needs. Built to original specifications, this unit ensures consistent working conditions and integration.
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The OEM ASP5310-6606718 DEF head unit is a critical component in Cummins engines equipped with Selective Catalytic Reduction (SCR) systems. This unit is responsible for monitoring Diesel Exhaust Fluid (DEF) levels, temperature, and delivering fluid to the dosing module, all while communicating with the engine’s control system.
When the DEF head fails, it can result in incorrect readings, warning codes, or system shutdowns. Replacing it with the correct OEM part ensures proper communication and fluid handling.
Core features of the OEM ASP5310-6606718 include:
- Integrated Level Sensor
- Reports real-time DEF levels to the ECM
- Built-In Heater Element
- Prevents fluid from freezing in low temperatures
- Temperature Sensor
- Ensures accurate dosing under variable conditions
- OEM-Compatible Connector
- Allows easy plug-in with Cummins wiring harness
- Standard Tank Mounting
- Designed for direct installation on compatible DEF tanks
Verify your equipment’s compatibility and confirm the OEM part number (ASP5310-6606718) before ordering.
This DEF head unit is suitable for a wide range of Cummins-powered commercial, industrial, and vocational vehicles that require precise emissions system management.
A failing DEF (Diesel Exhaust Fluid) head unit can trigger system warnings, cause inaccurate readings, or lead to serious driveability issues. Spotting the signs early can help avoid unnecessary downtime and expensive repairs.
Common Signs of a Bad DEF Head Unit:
- Inaccurate DEF Level Readings
- The dash may show full when the tank is low—or empty when it’s clearly filled.
- “Service DEF System” Warning
- This message often appears when the head unit fails to report accurate data to the ECM.
- Check Engine Light or DEF-Related Codes
- Diagnostic codes like SPN 3364, SPN 1761, or SPN 5246 may appear, pointing to sensor or communication faults.
- DEF Mileage Countdown or Derate Warning
- You might see messages like “XX miles until speed limited”, indicating the system can't verify DEF status.
- No DEF Flow Detected
- If the truck reports no DEF usage, despite normal driving, the sensor or internal heater may have failed.
How to Confirm the Issue:
- Use an OBD-II or HD diagnostic tool to read trouble codes
- Visually inspect the harness and connector for corrosion or damage
- Check for manufacturer recalls or technical service bulletins (TSBs)
If these signs are present, replacing the DEF head unit is often the only fix. Clearing codes and running a drive cycle afterward helps confirm successful repair.
It manages diesel exhaust fluid (DEF) suction, heating, temperature sensing, and level monitoring in SCR-based emissions systems.
Yes, issues with fluid level or temperature sensing, or heater function, can trigger fault codes and engine derate.
Symptoms include incorrect DEF level warnings, DEF temperature faults, poor dosing performance, or system fault codes.
Yes, prolonged vibration or improper mounting can lead to internal sensor failure or connector issues.
Cummins DEF Head Units
