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Tiffin Motorhomes Cummins ISX DEF Head Unit

TIFFIN MOTORHOMES 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 NUMBER5023032
PART TYPEDEF Head Unit
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEISX
YEAR
PART NUMBER5410-22-FA01-5
APPLICATION NOTESTiffin Motorhomes
ADDITIONAL NOTESDEF Header, 40 MICRON, 22"

PRODUCT DESCRIPTION

This is a Remanufactured, Tamerx DEF Head Unit, Tamerx part number 5410-22-FA01-5 ( OEM Part Number 5023032 ). 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 OEM5023032
Additional OEM5023032

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490540361
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.


The Tiffin Motorhomes Cummins ISX DEF Head Unit orchestrates your aftertreatment system with precision, controlling DEF dosing to ensure peak emissions performance and system efficiency. Built to OEM standards for seamless integration and long-term durability, it’s the dependable component to keep your motorhome running clean, responsive, and compliant—mile after mile.

PEOPLE ALSO ASKS | BLOG(S)

When it comes to keeping your motorhome compliant with emissions regulations, the DEF (Diesel Exhaust Fluid) system plays a critical role. For Tiffin Motorhomes equipped with the Cummins ISX engine, the DEF Head Unit is a vital component that helps monitor and regulate DEF levels, temperature, and quality. A properly functioning DEF head ensures smooth operation and prevents costly downtime caused by system faults.

The Tiffin Motorhomes Cummins ISX DEF Head Unit, OEM 14484, is designed to deliver dependable performance and accurate monitoring within the Selective Catalytic Reduction (SCR) system. By replacing a faulty DEF head promptly, motorhome owners can avoid issues like derates, error codes, and unnecessary repair delays.

  • Accurate Monitoring: Provides precise readings of DEF levels, temperature, and quality to keep your system running smoothly.

  • OEM Quality: Built to meet OEM standards (OEM 14484), ensuring compatibility with the Cummins ISX engine in Tiffin Motorhomes.

  • Prevents Derates: A reliable DEF head helps reduce the risk of engine derates caused by faulty readings or sensor malfunctions.

  • Easy Replacement: Designed for straightforward installation to minimize downtime and get you back on the road quickly.

  • Durable Construction: Manufactured to handle demanding conditions for long-lasting reliability.

Replacing a failing DEF Head Unit is not just about compliance—it’s about maintaining the reliability of your Tiffin Motorhome. With the Tiffin Motorhomes Cummins ISX DEF Head Unit (OEM 14484), you can trust that your emissions system is operating properly, keeping your travels worry-free and your engine protected.

The DEF head unit plays a vital role in monitoring fluid levels, temperature, and quality within your diesel exhaust fluid system. When this component fails, it can trigger engine derates and costly downtime. Fortunately, adopting the right maintenance practices can help extend the lifespan of your DEF head unit and keep your emissions system running reliably.

Maintenance Practices to Extend DEF Head Unit Life

  • Use High-Quality DEF Fluid
    Always choose certified DEF fluid to prevent contamination and avoid damaging sensitive sensors in the head unit.

  • Keep the DEF Tank Clean
    Regularly check the tank for debris, dirt, or crystallization build-up. A clean tank reduces the chances of clogging and inaccurate sensor readings.

  • Inspect Electrical Connections
    Look for signs of corrosion or loose wiring in the DEF head’s connectors to ensure proper communication with the engine control module.

  • Protect Against Temperature Extremes
    Store vehicles and DEF fluid in environments that minimize exposure to freezing or excessive heat, as extreme conditions can harm sensors.

  • Perform Routine System Checks
    Include DEF system inspections in your regular maintenance schedule. Early detection of issues can prevent head unit failure.

  • Handle with Care During Service
    Avoid rough handling or using improper tools when servicing the DEF tank or head unit to prevent unnecessary damage.

A well-maintained DEF head unit not only extends the life of the component but also ensures compliance with emissions standards and reduces costly downtime. By following consistent maintenance practices, operators can keep their diesel systems dependable and efficient for the long run.

When kept clean and operating under well-regulated conditions, it can remain functional for many years and service cycles.

Warning lights for the DEF or SCR system, inconsistent DEF use, or errors in regeneration often precede failure.

A failure disables proper DEF dosing, potentially causing elevated NOₓ levels, engine derate, or emission noncompliance.

By commanding dosing pulses, measuring actual DEF volume delivered, and comparing it to expected values via diagnostic tools.

 

Cummins DEF Head Units

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