Kalmar Ottawa Cummins ISL, ISB 6.7L DEF Head Unit
KALMAR OTTAWA CUMMINS ISL, 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 5410-18-FA01-3 ( OEM Part Number 90035877 ). This part is primarily made for a Cummins ISL, 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, 18"
OEM NUMBERS
| Primary OEM | 90035877 |
| Additional OEM | 90035877 |
ADDITIONAL DETAILS
| CONDITION | Remanufactured |
| UPC / Barcode | 00840490539976 |
| 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.
Give your terminal fleet an emissions edge with the Kalmar / Ottawa Cummins ISL / ISB 6.7L DEF Head Unit — precision-engineered for real-time DEF level, temperature, and quality monitoring. Built rugged to withstand industrial duty, it integrates seamlessly into your SCR system to help prevent derates, maintain compliance, and keep your operation running clean, reliable, and efficient mile after mile.
PEOPLE ALSO ASKS | BLOG(S)
In material handling and terminal applications, every minute of uptime matters. For Kalmar Ottawa machines equipped with Cummins ISL or ISB 6.7L engines, the emissions aftertreatment system plays a silent but vital role. At the center of that system is the DEF Head Unit (OEM 90035877 / 911181)—a precision sensor and dosing module that ensures your diesel-exhaust fluid (DEF) circuit delivers clean, compliant operation. When the DEF head drifts or fails, error codes, SCR faults, or derates can quietly erode your productivity.
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Senses DEF fluid level, temperature, and urea concentration, relaying precise data to the engine control module
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Manages accurate dosing of DEF into the exhaust stream so the SCR (Selective Catalytic Reduction) system can properly convert NOx
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Designed to fit Kalmar Ottawa / Cummins ISL / ISB 6.7L platforms with OEM compatibility thanks to the 90035877 / 911181 spec
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Helps prevent warning codes, emissions faults, and engine derates resulting from sensor drift or incorrect readings
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Builds in a 40-micron filtration element to protect downstream injectors and plumbing from contamination
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Engineered to withstand vibration, temperature cycling, and exposure to corrosive DEF chemistry
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Field-friendly replacement reduces downtime and simplifies maintenance in operational environments
In terminal operations, a subtle emissions fault can escalate into an unscheduled service event. By outfitting your machine with a correctly specified OEM 90035877 / 911181 DEF Head Unit, you restore the integrity of your emissions feedback loop, maintain SCR efficiency, and reduce the risk of surprise faults or derates. In the emissions chain, this little device may be small—but its role is anything but minor.
The DEF (Diesel Exhaust Fluid) head unit plays an important role in keeping emissions systems compliant by monitoring fluid level, quality, and temperature. Because it’s constantly exposed to DEF fluid and environmental conditions, proper care is essential. With the right maintenance practices, you can extend the life of your DEF head unit and reduce the risk of unexpected failures.
Best Maintenance Practices for DEF Head Units
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Use Clean, Certified DEF
Always use ISO 22241-compliant DEF to avoid contamination that can damage sensitive sensors. -
Inspect Regularly
Check the DEF head unit during routine maintenance for signs of crystallization, leaks, or corrosion. -
Keep Electrical Connections Clean
Ensure wiring and connectors are secure and free from dirt or corrosion to maintain accurate communication with the ECM. -
Prevent Crystallization Buildup
Clean away DEF crystals around the tank and sensors before they interfere with readings. -
Store DEF Properly
Keep DEF in sealed containers, away from heat or sunlight, to preserve fluid quality before use. -
Protect From Extreme Temperatures
Whenever possible, park in areas that reduce prolonged exposure to freezing or excessively hot conditions.
Extending the life of your DEF head unit comes down to consistent care. By using high-quality DEF, inspecting the unit regularly, and protecting it from contamination and temperature extremes, you can maximize performance and avoid costly downtime. Preventive maintenance is always less expensive than unexpected repairs.
A built-in temperature sensor measures the DEF fluid’s temperature and sends that information to the control module.
Problems like sensor failures, clogged filters, freezing DEF in cold conditions, or erratic readings are typical.
You may observe DEF system error codes, inconsistent level or temperature readings, or the machine going into derate.
It should be checked during regular DEF or emissions system maintenance or whenever DEF warnings or faults appear.
Cummins DEF Head Units
