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REV Group Cummins ISL DEF Head Unit

REV GROUP CUMMINS ISL DEF HEAD UNIT

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$895.00

CORE CHARGE:

$250.00
iCORE DISCLAIMER: The CORE charge is a 30 day hold and will not be processed as long as the CORE is returned within 30 days. If you do not have a CORE or fail to return the CORE within 30 days, the CORE charge hold amount will be processed at that time.

AVAILABILITY IN STOCK
OEM NUMBER 10563072
PART TYPE DEF Head Unit
BRAND Tamerx Diesel Products
ENGINE MAKE Cummins
ENGINE TYPE ISL
YEAR
PART NUMBER 4310-18-14
APPLICATION NOTES REV Group
ADDITIONAL NOTES DEF Header, 40 MICRON, 18"

PRODUCT DESCRIPTION

This is a Remanufactured, Tamerx DEF Head Unit, Tamerx part number 4310-18-14 ( OEM Part Number 10563072 ). This part is primarily made for a Cummins ISL, 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 OEM10563072
Additional OEM10345880, 10563072

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490540491
WEIGHT8.00 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.


Step up your emissions game with the REV Group Cummins ISL DEF Head Unit — engineered for flawless performance in REV Group chassis. This powerhouse delivers precise monitoring of DEF level, temperature, and quality to safeguard your SCR system. With seamless integration into Cummins ISL engines and rugged construction built to last, it helps you avoid derates and stays road-ready under pressure. Reliable, robust, and ready to go — your emissions solution, perfected.

PEOPLE ALSO ASKS | BLOG(S)

In modern diesel systems, the Diesel Exhaust Fluid (DEF) circuit has become critical—not optional—to meet emissions standards and avoid costly engine derates or fault codes. For REV Group vehicles running the Cummins ISL engine, the REV Group Cummins ISL DEF Head Unit (OEM 719006, Tamerx part 5410-11-FA01-5) serves as a vital conduit for accurate dosing, sensing, and regulation of DEF within the exhaust aftertreatment system. A failing or worn head unit can disrupt readings, trigger warnings, or even push your engine into limp mode.

  • Regulates DEF dosing into the exhaust stream based on sensor feedback

  • Monitors fluid level, temperature, and urea concentration to feed the engine control module valid data

  • Precisely engineered to OEM 719006 specifications, ensuring plug-and-play compatibility

  • Prevents SCR system errors, warning lights, or engine derates caused by mis-measurements

  • Built to resist vibration, corrosion, and thermal stress encountered in daily operation

  • Designed for quick replacement to reduce downtime and restore emissions compliance

Don’t risk leaving your emissions system to chance. Installing the OEM 719006 REV Group Cummins ISL DEF Head Unit helps maintain accurate dosing, prevents errors, and gives you confidence that your vehicle stays emissions-ready. For drivers and fleet managers relying on REV Group trucks, this component is one of your best safeguards against unwelcome maintenance surprises.

The DEF (Diesel Exhaust Fluid) head unit is a key component in modern diesel engines, responsible for monitoring fluid level, quality, and temperature. When it begins to fail, the entire emissions system can be affected, often leading to costly downtime or vehicle derates. Recognizing the warning signs early can help operators take action before the problem escalates.

Common Symptoms of a Failing DEF Head Unit

  • Dashboard Warning Lights
    Check engine lights or DEF system warnings may illuminate when the head unit sends inaccurate or missing signals to the ECM.

  • Diagnostic Trouble Codes (DTCs)
    Codes such as P203F (low fluid), P205B (temperature sensor fault), or P207F (DEF quality issue) often indicate head unit-related failures.

  • Incorrect DEF Level Readings
    The gauge may show the tank as empty or full even when it’s not, signaling a faulty level sensor.

  • Poor DEF Quality Alerts
    False alerts about contaminated or degraded DEF fluid may appear, even when the fluid meets proper standards.

  • Engine Derate or Reduced Power
    If the head unit fails to report correctly, the system may begin reducing engine performance to maintain emissions compliance.

  • Unusual Crystallization Around Sensors
    Build-up in and around the DEF tank area can interfere with sensor readings, leading to inaccurate data or system faults.

A failing DEF head unit can quickly escalate from simple warnings to serious engine restrictions. By paying attention to common symptoms—such as inaccurate readings, DTCs, or derate conditions—operators can take timely action and avoid unexpected downtime. Early diagnosis and maintenance are key to keeping diesel engines compliant and dependable.

It should be inspected and tested during routine service intervals for sensor accuracy and cleanliness.

Extreme cold can slow sensor response or freeze fluid, whereas high heat may stress components or drift calibration.

Highly vulnerable—particles or deposits can impair sensors or clog passages, causing erroneous readings.

The ECM may interpret the delay as a fault or abnormal level until the reading stabilizes or is reset.

Cummins DEF Head Units

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