
Kovatch Mobile Equipment (KME) Cummins ISB 6.7L DEF Head Unit
KOVATCH MOBILE EQUIPMENT (KME) CUMMINS ISB 6.7L DEF HEAD UNIT

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a Remanufactured, Tamerx DEF Head Unit, Tamerx part number 4310-11-10. This part is primarily made for a Cummins ISB 6.7L, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
Additional Notes: DEF Header, 40 MICRON, 11"
OEM NUMBERS
ADDITIONAL DETAILS
| CONDITION | Remanufactured |
| UPC / Barcode | 00840490540040 |
| WEIGHT | 8.00 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.
Take your fire apparatus emissions game up a notch with the Kovatch Mobile Equipment (KME) Cummins ISB 6.7L DEF Head Unit — precision engineered for seamless SCR performance. This rugged, OEM-grade unit delivers real-time monitoring of DEF level, temperature, and quality to help your system stay sharp, avoid derates, and run clean under pressure. Built tough for the toughest missions, it’s the emissions upgrade your fleet deserves.
PEOPLE ALSO ASKS | BLOG(S)
The DEF (Diesel Exhaust Fluid) head unit is a critical component of your vehicle’s emissions system. It measures DEF level, temperature, and quality to ensure proper system operation. When the DEF head unit begins to fail, your vehicle may show warning signs that, if ignored, can lead to reduced power or even engine derate. Recognizing these symptoms early can help prevent costly repairs and downtime.
Common Symptoms of a Failing DEF Head Unit
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Dashboard Warning Lights
The check engine light or DEF system alert may illuminate when the head unit sensors send incorrect or missing data. -
Inaccurate DEF Readings
The system may display the DEF tank as empty, full, or low when the fluid level is actually fine. -
Recurring Fault Codes
Codes such as P203F (low DEF level), P205B (temperature sensor issue), or P207F (DEF quality fault) are often linked to a bad head unit. -
False DEF Quality Alerts
You may receive warnings about poor DEF quality, even when using certified, clean DEF fluid. -
Engine Derate Mode
If the ECM (Engine Control Module) can’t verify DEF data, it may limit power or speed to stay emissions-compliant. -
Erratic or Inconsistent Behavior
The DEF system may fluctuate between normal and faulted readings as the head unit’s sensors begin to fail.
A failing DEF head unit can start with simple dashboard warnings but quickly lead to performance issues or engine derate. If you notice inaccurate DEF readings, repeated fault codes, or emission alerts, have the unit inspected immediately. Early attention helps keep your emissions system reliable and your vehicle running smoothly.
During routine DEF or emissions system maintenance or whenever DEF faults appear.
Flush the fluid pickup line with clean DEF and gently clean or replace the internal strainer if clogged.
Yes — impurities or crystallized deposits can clog filters, damage sensors, or cause misreadings.
The SCR system cannot reduce NOₓ effectively, leading to fault codes or derate.

















































































































































































































































































