Volvo/Mack D13/MP8 DEF Head Unit
VOLVO/MACK D13/MP8 DEF HEAD UNIT
ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY
WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a Remanufactured, Tamerx DEF Head Unit, Tamerx part number 24383068 ( OEM Part Number 24383068 ). This part is primarily made for a Volvo/Mack D13/MP8, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
Additional Notes: DEF Header, 70 L
OEM NUMBERS
| Primary OEM | 24383068 |
| Additional OEM | 21636394, 21834302, 21866608, 21906237, 22015705, 22021891, 22278201, 22306785, 22432646, 23043836, 23045836, 23539939, 24383068, 701162AT |
ADDITIONAL DETAILS
| CONDITION | Remanufactured |
| UPC / Barcode | 00840490541672 |
| WEIGHT | 8.00 LBS |
SHIPPING OPTIONS
Ship Weight : 8.00 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.
Designed for Volvo and Mack trucks, the DEF Head Unit OEM 24383068 ensures the Diesel Exhaust Fluid system functions reliably in D13 and MP8 engines. This genuine OEM part is manufactured to precise factory standards, delivering accurate fitment and dependable service in demanding applications. By supporting emissions compliance, it contributes to smooth and consistent engine operation while meeting regulatory requirements. Built with durability in mind, it withstands the rigorous conditions of heavy-duty trucking. For operators seeking a trusted replacement, this DEF head unit provides long-term reliability and OEM-certified quality.
PEOPLE ALSO ASKS | BLOG(S)
In Volvo and Mack trucks equipped with the D13 or MP8 engines, the DEF Head Unit bearing OEM part number 24383068 plays a central role in the Selective Catalytic Reduction (SCR) aftertreatment system. It acts as a smart interface between the Diesel Exhaust Fluid (DEF) tank and the engine’s control systems.
What It Does
- Fluid Level Monitoring
- The primary purpose is to sense how much DEF remains in the tank and relay that information to the engine’s electronic control module (ECM). This ensures the system knows when to alert operators to refill.
- Integration of Multiple Sensors
- In many modern designs, that head unit not only monitors level, but also tracks temperature and checks fluid quality to ensure the DEF meets required standards.
- Fluid Header / Distribution
- The unit also serves as the header — the intake, return, and routing point for DEF flow between the tank and dosing / injection systems.
- Temperature Management Support
- Because DEF can freeze or degrade under unfavorable temperatures, the head unit often incorporates heating or coolant paths or supports sensors to assist in maintaining usable fluid.
- Communication & Fault Detection
- It sends real-time data to the ECM about fluid status, and if anything is out of range (low level, bad quality, freeze risk) it helps trigger fault codes, warnings, or system safeguards.
In short, the OEM 24383068 DEF Head Unit in Volvo/Mack D13 / MP8 engines is essential for monitoring, controlling, and safeguarding the DEF system. It ensures proper fluid supply, helps maintain system integrity, and supports compliance with emissions requirements.
A DEF (Diesel Exhaust Fluid) head unit is a critical part of a truck’s emissions system. It tracks fluid level, quality, and temperature to keep the vehicle compliant with regulations. Like any component, it won’t last forever — but how long should you expect it to serve reliably?
Average Lifespan of a DEF Head Unit
Most DEF head units last between 5 and 7 years under normal operating conditions. However, heavy-duty cycles, harsh environments, and poor DEF handling can cause earlier failures.
Factors That Affect Lifespan:
- Quality of DEF fluid
- Contaminated or expired DEF can damage sensors
- Operating environment
- Extreme heat or cold puts stress on the unit
- Storage and handling
- Using improper containers introduces dirt and debris
- Maintenance practices
- Skipping inspections can allow small issues to grow
How to Extend the Life of a DEF Head Unit
Drivers and fleets can maximize the lifespan by:
- Always using certified DEF fluid
- Keeping storage containers sealed and clean
- Protecting the tank from extreme weather when possible
- Inspecting the DEF system regularly for buildup or damage
A DEF head unit should last several years, but its longevity depends heavily on how well DEF is stored, handled, and maintained. Preventive care is the best way to get the most life out of this crucial component.
They confirm problems by checking active fault codes and testing sensor feedback.
Yes, it is designed as a direct-fit OEM component for the DEF tank assembly.
Ignoring a faulty unit can cause incorrect DEF readings, warning lights, and unplanned downtime.
Failure can cause fault codes, DEF warnings, and limited vehicle operation.
