Global Environmental Products DEF Head Unit
GLOBAL ENVIRONMENTAL PRODUCTS 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 4310-11-21 ( OEM Part Number GS382972 ). This part is primarily made for a , and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
Additional Notes: DEF Header, 40 MICRON, 11"
OEM NUMBERS
| Primary OEM | GS382972 |
| Additional OEM | GS382972 |
ADDITIONAL DETAILS
| CONDITION | Remanufactured |
| UPC / Barcode | 00840490541009 |
| 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.
The Global Environmental Products DEF Head Unit: OEM GS382972 provides accurate monitoring and reliable performance for the diesel exhaust fluid system in compatible Global Environmental Products equipment. Built to OEM specifications, this unit tracks DEF level, temperature, and quality to help maintain emissions compliance and steady aftertreatment operation. Its rugged construction ensures durability in demanding service environments, protecting both the exhaust system and overall engine efficiency. Choosing an OEM DEF head unit minimizes compatibility risks and supports dependable long-term reliability. This component is a trusted solution for keeping Global Environmental Products machinery operating smoothly and within emissions requirements.
PEOPLE ALSO ASKS | BLOG(S)
The DEF (Diesel Exhaust Fluid) Head Unit used by Global Environmental Products is a vital part of the vehicle’s emissions control system. It is mounted on top of the DEF tank and is designed to manage fluid monitoring, routing, and protection functions all within one compact unit.
Here’s a breakdown of the key components found inside this type of DEF head unit:
Key Components:
- Fluid Level Sensor
- This sensor detects the amount of DEF available in the tank and communicates this information to the engine control system. It helps prevent low-fluid conditions that could lead to system faults or reduced engine operation.
- Temperature Sensor
- It monitors the DEF fluid temperature to ensure it remains within operational range. DEF can freeze or crystallize, so knowing the temperature helps activate heaters or adjust system responses.
- Internal Filter / Strainer
- A built-in filter, often around 40 microns, removes debris and particulates from the fluid. Clean DEF ensures smooth operation and protects downstream components from damage.
- Suction / Pickup Port
- This port allows DEF to be drawn from the tank and sent to the dosing module for injection into the exhaust system.
- Return Port
- Excess or unused DEF fluid flows back into the tank through the return port. This maintains system pressure and fluid consistency.
- Electrical Connector(s)
- The unit includes connectors that relay sensor data—such as fluid level and temperature—to the vehicle’s electronic control module.
- Sealing Gasket and Mounting Flange
- These structural elements ensure a secure, leak-proof connection between the head unit and the DEF tank. The mounting flange also supports the header body that houses internal components.
Each of these components plays a critical role in maintaining proper DEF delivery and ensuring that the emissions control system remains compliant and reliable. A properly functioning DEF head unit helps reduce downtime, avoid engine derate, and extend the life of your vehicle’s emissions system.
The DEF (Diesel Exhaust Fluid) head unit is responsible for reporting fluid level, temperature, and quality to your engine’s control system. When it fails, it can cause dashboard warnings, reduced engine performance, and derate events. Diagnosing it early can save you from unnecessary repairs and downtime.
Step-by-Step: How to Diagnose a DEF Head Unit Issue
- Scan for Trouble Codes
- Use a diagnostic tool to check for codes like SPN 1761, 3031, or P203F—these often point to DEF level or quality sensor problems.
- Visually Inspect the DEF Tank
- Confirm fluid level manually. If the dashboard shows empty but the tank is full, the head unit may be providing inaccurate data.
- Check Wiring and Connectors
- Look for corrosion, loose pins, or moisture around the harness. Damaged wiring can mimic sensor failure.
- Review Freeze or Heat History
- If the system experienced extreme cold or heat, internal components may be damaged from crystallization or overheating.
- Monitor DEF Usage
- Unusual increases in DEF consumption can signal a faulty reading or dosing issue.
If these checks confirm inaccurate or erratic behavior, the DEF head unit likely needs to be replaced.
It provides critical DEF data to the SCR system to maintain EPA standards.
Yes, a malfunctioning unit can reduce machine performance and take it out of service.
Delays can lead to failed emissions checks, derates, and costly downtime.
No, it cannot be repaired and must be replaced if defective.