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Spartan Cummins ISX DEF Head Unit

SPARTAN CUMMINS ISX 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 NUMBER2153-LL2-801002
PART TYPEDEF Head Unit
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEISX
YEAR
PART NUMBER5410-22-FC01-6
APPLICATION NOTESSpartan
ADDITIONAL NOTESDEF Header, 40 MICRON, 22"

PRODUCT DESCRIPTION

This is a Remanufactured, Tamerx DEF Head Unit, Tamerx part number 5410-22-FC01-6 ( OEM Part Number 2153-LL2-801002 ). This part is primarily made for a Cummins ISX, 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 OEM2153-LL2-801002
Additional OEM2153-LL2-801002

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490540705
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.


Revitalize your emissions system with the Spartan Cummins ISX DEF Head Unit (OEM 2153-LL2-801002) — precision-engineered for superior compatibility with Spartan chassis and Cummins ISX engines. Experience real-time accuracy in tracking DEF level, temperature, and quality, all within a rugged, OEM-grade design built to resist harsh conditions. Seamless integration keeps your SCR system humming, helps avoid derates, and restores confidence on the road — the clean, compliant solution your rig deserves.

PEOPLE ALSO ASKS | BLOG(S)

When your truck is built on a Spartan chassis and powered by a Cummins ISX engine, few components are as critical—but as underappreciated—as the DEF (Diesel Exhaust Fluid) head unit. This small yet essential module carries a weighty responsibility: it ensures your aftertreatment system can reliably monitor and dose DEF. If it fails or drifts out of spec, you face fault codes, check engine lights, or engine derates that can derail your uptime.

  • Monitors DEF fluid parameters — level, temperature, and urea concentration — and feeds accurate data to your engine control module

  • Controls precise dosing of DEF into the exhaust stream, allowing the SCR (Selective Catalytic Reduction) system to reduce NOx emissions effectively

  • Built to OEM 10071997 standards, so it fits seamlessly in Spartan Cummins ISX systems

  • Helps prevent emissions warnings, engine derates, and fault codes caused by miscommunication or bad sensor signals

  • Designed to endure vibration, thermal cycling, and the corrosive nature of DEF chemicals

  • Simplifies replacement with a drop-in design that minimizes downtime

Don’t let a faulty DEF head module compromise your emissions compliance or put your truck in limp mode. Installing the OEM 10071997 Spartan Cummins ISX DEF Head Unit restores system integrity, keeps your SCR system operating smoothly, and protects you from surprise errors or downtime. Treat this module not just as a sensor—but as a guardian of your emissions system’s health.

The DEF (Diesel Exhaust Fluid) head unit is a sensitive component that measures DEF level, quality, and temperature. When issues arise, operators often wonder if cleaning the unit can solve the problem or if full replacement is the only option. While cleaning may help in certain situations, it’s not always a permanent fix.

When Cleaning May Help

  • Crystallization Build-Up
    DEF naturally forms crystals when exposed to air. Carefully cleaning away minor build-up can sometimes restore sensor accuracy.

  • Tank Debris or Contamination
    If dirt or other particles interfere with the sensors, cleaning the DEF tank and surrounding components may improve performance.

  • Corroded or Dirty Connectors
    Electrical connectors can be cleaned to restore proper communication between the head unit and the engine control module (ECM).

When Replacement Is Necessary

  • Failed Internal Sensors
    If the quality, temperature, or level sensors are damaged, cleaning will not restore function.

  • Electrical or Circuit Failures
    Internal electronics cannot be repaired by cleaning and require full replacement.

  • Recurring Fault Codes
    If trouble codes persist after cleaning attempts, the head unit is likely failing and must be replaced.

Cleaning a DEF head unit can help in cases of crystallization or minor contamination, but it’s rarely a long-term solution. Because of the delicate sensors and electronics inside, most failures require replacement to restore reliable operation. If symptoms continue after cleaning, replacement is the best way to keep your vehicle compliant and avoid downtime.

A level sensor (float or optical) signals the engine control module when the fluid drops below a safe threshold.

The quality sensor flags the condition, triggering fault codes or limiting dosing to safeguard the system.

With clean DEF, correct handling, and periodic checks, it can function reliably for several years before drift or failure.

Erratic sensor outputs, frequent error codes, “DEF system” warnings, or engine power reduction are common indicators.

Cummins DEF Head Units

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