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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

$1,295.00

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 NUMBER10324253
PART TYPEDEF Head Unit
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEISL
YEAR
PART NUMBER5410-22-FC01-5
APPLICATION NOTESREV Group
ADDITIONAL NOTESDEF Header, 40 MICRON, 22"

PRODUCT DESCRIPTION

This is a Remanufactured, Tamerx DEF Head Unit, Tamerx part number 5410-22-FC01-5 ( OEM Part Number 10324253 ). 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, 22"

OEM NUMBERS

Primary OEM10324253
Additional OEM10324221, 10324253

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490540699
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.


Ignite superior emissions performance with the REV Group Cummins ISL DEF Head Unit — precision-engineered to keep your REV Group chassis compliant and efficient. This robust unit provides real-time tracking of DEF level, temperature, and quality, ensuring seamless integration with Cummins ISL systems. Optimized to fend off engine derates and built to handle the road’s demands, it’s the smart upgrade for long-lasting reliability and clean-running power.

PEOPLE ALSO ASKS | BLOG(S)

In today’s strict regulatory environment, your DEF (Diesel Exhaust Fluid) system is at the core of keeping a diesel vehicle compliant. The REV Group Cummins ISL DEF Head Unit (OEM 719006) is a mission-critical component that ensures your aftertreatment system can measure, adjust, and respond to changing conditions. Failures here often result in emissions warnings, error codes, or even derates—so choosing the right DEF head is more than just repair work; it’s preventative maintenance.

  • Continuously monitors DEF fluid level, temperature, and urea concentration and feeds data to the engine control system

  • Controls precision dosing of DEF into the exhaust stream to support the SCR (Selective Catalytic Reduction) process

  • Manufactured to match OEM 719006 tolerances for plug-and-play compatibility with REV Group Cummins ISL installations

  • Reduces risk of warning codes, system faults, and engine derates caused by inaccurate or errant sensor feedback

  • Built to resist vibration, thermal cycling, and exposure to DEF’s corrosive chemistry

  • Designed for relatively easy installation to minimize vehicle downtime

Waiting until a warning light appears can be costly. Installing the OEM 719006 REV Group Cummins ISL DEF Head Unit ensures your emissions system stays accurate, reliable, and compliant—protecting your engine, your operations, and your peace of mind.

 
 

The DEF (Diesel Exhaust Fluid) head unit is a vital part of your vehicle’s emissions system, monitoring DEF quality, level, and temperature. When it begins to fail, the system may provide inaccurate information to the engine control module (ECM), often leading to reduced performance or costly downtime. Spotting the signs early can help you avoid bigger problems.

Common Symptoms of a Failing DEF Head Unit

  • Warning Lights on the Dashboard
    Check engine or DEF system alerts often appear as one of the first signs of failure.

  • Recurring Diagnostic Trouble Codes (DTCs)
    Codes such as P203F, P205B, or P207F may indicate problems with the DEF head sensors.

  • Incorrect DEF Readings
    The system may display empty when the tank is full, or show false full readings when fluid is low.

  • False Fluid Quality Alerts
    You may receive poor DEF quality warnings even when using certified, uncontaminated DEF.

  • Engine Derate or Power Loss
    As the ECM struggles to verify DEF data, it may reduce power or limit speed to maintain compliance.

  • Crystallization Around the Tank or Sensors
    Build-up can block accurate readings, often signaling underlying head unit issues.

A failing DEF head unit can quickly escalate from simple alerts to severe engine restrictions if ignored. By recognizing the common symptoms—like false readings, fault codes, or reduced engine power—you can act early, avoid breakdowns, and keep your vehicle compliant and dependable.

Very susceptible — particles, crystals, or impurities can impair sensors or clog internal passages.

Yes — diagnostic tools typically allow resetting or recalibrating after installation or cleaning.

Over time, sensor drift, seal degradation, and electronic wear can reduce measurement precision and reliability.

The unit may output intermittent faults, erratic readings, or DEF system alerts before failing entirely.

Cummins DEF Head Units

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