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Spartan Cummins ISX DEF Head Unit

Click Here To View All Cummins DEF Head Units

SPARTAN CUMMINS ISX DEF HEAD UNIT

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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 NUMBER3133-LL2-801001
PART TYPEDEF Head Unit
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEISX
YEAR
PART NUMBER4310-22-10
APPLICATION NOTESSpartan
ADDITIONAL NOTESDEF Header, 40 MICRON, 22"

PRODUCT DESCRIPTION

This is a Remanufactured, Tamerx DEF Head Unit, Tamerx part number 4310-22-10 ( OEM Part Number 3133-LL2-801001 ). 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 OEM3133-LL2-801001
Additional OEM3133-LL2-801001

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490540880
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.


Supercharge your emissions system with the Spartan Cummins ISX DEF Head Unit — engineered for flawless compatibility with Spartan chassis and Cummins ISX engines. Delivering real-time precision in DEF level, temperature, and quality monitoring, this rugged, OEM-grade unit helps your SCR system stay in sync, avoid derates, and maintain compliance under any condition. Built for dependability and designed for performance — the upgrade your rig never saw coming (but never wants to be without).

PEOPLE ALSO ASKS | BLOG(S)

Every component in your emissions system matters—but few get as little attention as the DEF (Diesel Exhaust Fluid) head. On a Spartan chassis running a Cummins ISX, the Spartan Cummins ISX DEF Head Unit, OEM 2153-LL2-801002, acts as the central node for sensing, feedback, and dosing. If this little box fails, your emissions system can go haywire—fault codes, derates, warning lamps—and none of those welcome surprises are good when you’re on the road.

  • Measures fluid level, temperature, and urea concentration inside the DEF tank and relays the data to your engine control module

  • Controls precise dosing of DEF into the exhaust stream so the SCR (Selective Catalytic Reduction) system can reduce NOx emissions correctly

  • Built to the OEM 2153-LL2-801002 specification, ensuring plug-and-play compatibility with Spartan / Cummins ISX setups

  • Helps prevent emissions fault codes, warning lights, and engine derates triggered by bad or missing sensor signals

  • Designed to endure harsh conditions—vibration, thermal cycling, and exposure to DEF’s corrosive chemistry

  • Engineered for field replacement, helping minimize downtime

Drivers and fleet owners often overlook the DEF head until it’s too late. That’s a mistake. With the OEM 2153-LL2-801002 Spartan Cummins ISX DEF Head Unit installed, you restore the feedback chain in your emissions circuit, keep your SCR working properly, and avoid being sidelined by error codes or enforced power losses. In short: don’t let this small component be your system’s weak link.

 

The DEF (Diesel Exhaust Fluid) head unit monitors fluid level, temperature, and quality to ensure the emissions system operates correctly. Since DEF is highly sensitive to environmental conditions, temperature changes can have a direct impact on the performance and reliability of the DEF head unit. Understanding these effects can help operators take preventive steps to protect their system.

Ways Temperature Impacts DEF Head Unit Performance

  • Freezing Temperatures
    DEF begins to freeze at around 12°F (-11°C). When frozen, sensors may give inaccurate readings until the fluid thaws.

  • High Heat Exposure
    Excessive heat can degrade DEF fluid, causing sensors to detect abnormal values and potentially reducing the accuracy of the head unit.

  • Sensor Stress
    Rapid temperature swings put strain on the sensitive electronics within the DEF head unit, which may lead to premature failure.

  • Crystallization Issues
    Freeze-thaw cycles encourage crystallization inside the tank, and buildup around sensors can interfere with their ability to provide accurate data.

  • Outdoor Storage Concerns
    Vehicles stored in extreme climates are more likely to experience head unit malfunctions due to prolonged exposure to hot or cold conditions.

Temperature plays a critical role in how well a DEF head unit performs. By minimizing exposure to extreme weather, storing vehicles properly, and using high-quality DEF fluid, operators can protect this essential component and extend its service life.

Yes, diagnostic tools often allow the head unit to be reset or calibrated after installation or cleaning.

With time, sensors drift, seals deteriorate, and electronic parts wear out, reducing measurement accuracy.

It may present intermittent fault codes, erratic readings, or repeated DEF system alerts before completely failing.

The engine control module may switch to a fail-safe or reduced power mode, disable DEF dosing, or limit performance until the unit is replaced.

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