Rosenbauer Cummins
ROSENBAUER CUMMINS
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 5410-18-FA01-7 ( OEM Part Number 8604149-S02 ). This part is primarily made for a Cummins , and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
Additional Notes: DEF Header, 40 MICRON, 18"
OEM NUMBERS
| Primary OEM | 8604149-S02 |
| Additional OEM | 8600553-2S1, 8604149-S02 |
ADDITIONAL DETAILS
| CONDITION | Remanufactured |
| UPC / Barcode | 00840490540033 |
| 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.
Meet the Rosenbauer Cummins DEF Head Unit — engineered for performance under pressure. This rugged, precision-tuned module gives your SCR system real-time data on DEF level, temperature, and quality, helping prevent costly engine derates and modal faults. Perfectly integrated for Rosenbauer applications, it adds compliance and confidence to your fleet, no matter the mission.
PEOPLE ALSO ASKS | BLOG(S)
When it comes to emergency vehicles like Rosenbauer fire trucks powered by Cummins engines, emissions systems must operate flawlessly. The Rosenbauer Cummins DEF Head Unit (OEM 8604149-S02) silently works behind the scenes to ensure your SCR (Selective Catalytic Reduction) system gets accurate data and dosing commands. If it malfunctions or drifts, you can end up with error codes, derates, or unexpected downtime—all of which are unacceptable when lives might depend on your rig.
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Monitors DEF fluid level, temperature, and urea concentration, sending real-time feedback to the engine control module
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Controls precise urea dosing into the exhaust stream so NOx emissions are reduced efficiently
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Designed to meet the OEM 8604149-S02 specification for plug-and-play integration on Rosenbauer / Cummins systems
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Helps prevent fault codes, warning lights, and engine derates once the sensor data strays from expected parameters
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Built to withstand thermal cycles, vibration, and exposure to DEF’s corrosive properties
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Field-friendly to replace, reducing the potential downtime for your apparatus
As tough as fire trucks are, their emissions systems are vulnerable to sensor faults. Installing the correct OEM 8604149-S02 Rosenbauer Cummins DEF Head Unit restores accuracy to your feedback loop, safeguards your SCR system, and helps ensure your vehicle remains reliable and emission-compliant under any call. Don’t let a small sensor become your biggest liability.
The DEF (Diesel Exhaust Fluid) head unit is an essential part of modern diesel emissions systems. It monitors DEF level, temperature, and quality to ensure the system functions within emission standards. When it fails, drivers may face warning lights, fault codes, or even derate conditions. Understanding what causes DEF head unit failures can help prevent costly downtime and repairs.
Common Causes of DEF Head Unit Failures
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Contaminated DEF Fluid
Dirt, debris, or water in the DEF tank can damage sensitive sensors and lead to false readings or malfunctions. -
Crystallization Buildup
DEF can crystallize when exposed to air, forming deposits that block sensors or restrict proper operation. -
Extreme Temperatures
Freezing weather can cause DEF to solidify, while excessive heat can degrade sensors and electronic components. -
Electrical Issues
Corroded wiring, loose connectors, or damaged circuits can interrupt communication between the head unit and the ECM (Engine Control Module). -
Normal Wear and Tear
Like any electronic part, the sensors inside the DEF head unit can degrade over time, especially in high-mileage or heavy-duty vehicles. -
Improper Handling During Maintenance
Mishandling the DEF tank or neglecting routine inspections can cause accidental damage to the unit.
Most DEF head unit failures are caused by preventable issues like contamination, crystallization, or temperature extremes. Using clean, ISO-certified DEF, maintaining electrical connections, and performing regular inspections can help extend the unit’s life. Proactive maintenance ensures your DEF system stays reliable, compliant, and ready for the road.
It includes a temperature sensor to track DEF fluid temperature and report it to the engine controller.
Issues like sensor faults, filter clogging, freeze damage, or erratic readings are common.
You may see DEF system fault codes, inconsistent level or temperature readings, or reduced engine performance.
During regular emissions or DEF system maintenance, or anytime DEF or SCR warnings appear.
Cummins DEF Head Units
