
Kalmar Ottawa Cummins ISL DEF Head Unit
KALMAR OTTAWA CUMMINS ISL 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 4310-18-8 ( OEM Part Number 90035882 ). This part is primarily made for a Cummins ISL, 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 | 90035882 |
Additional OEM | 90035882 |
ADDITIONAL DETAILS
CONDITION | Remanufactured |
UPC / Barcode | 00840490540392 |
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.
Designed for Kalmar Ottawa terminal tractors powered by Cummins ISL engines, the DEF Head Unit OEM 90035882 ensures reliable Diesel Exhaust Fluid system operation. This OEM component is manufactured to exact specifications, delivering accurate fitment and dependable service in demanding industrial environments. By keeping the DEF system functioning properly, it supports emissions compliance and consistent engine performance. Built for durability, it withstands the harsh conditions of daily yard operations, providing long-term reliability. For fleets and operators, this DEF head unit offers OEM-certified quality and the assurance of a trusted replacement.
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The OEM 90035882 DEF Head Unit is a multifunctional component used in Kalmar Ottawa terminal tractors and industrial vehicles powered by Cummins ISL engines. Mounted on the DEF (Diesel Exhaust Fluid) tank, it acts as the central hub for monitoring and managing fluid levels, temperature, and flow while communicating with the engine’s emission system.
Key Functions
- Fluid Sensing
- Measures the amount of DEF in the tank and alerts the system when levels are low.
- Temperature Monitoring
- Tracks DEF temperature to prevent freezing or overheating that could affect proper dosing.
- Fluid Routing
- Provides a pickup port to draw DEF into the dosing system and a return path for unused fluid.
- Filtration
- Includes an internal filter or strainer to block contaminants or crystallized particles from reaching sensitive system components.
- Signal Communication
- Sends sensor data to the engine control module (ECM), enabling accurate DEF dosing and fault detection.
The DEF Head Unit OEM 90035882 ensures that Kalmar Ottawa vehicles remain compliant with emissions regulations. By combining monitoring, fluid routing, filtration, and communication in one assembly, it protects the SCR system from failures and helps maintain reliable performance in demanding work environments.
When a DEF (Diesel Exhaust Fluid) head unit fails, one of the first questions drivers ask is whether they can safely replace it themselves. While it is possible for someone with mechanical experience, there are important risks to consider before attempting a do-it-yourself replacement.
What Makes Replacement Challenging?
The DEF head unit is connected to both the tank and the emissions system. Replacing it requires:
- Draining the DEF tank
- to avoid spills and contamination
- Disconnecting sensitive electrical connectors
- without damaging pins
- Handling DEF fluid carefully,
- as even small impurities can damage the new unit
- Resetting system codes
- after installation to restore proper function
Safety Considerations
If the installation is done incorrectly, you could face:
- Persistent warning lights or fault codes
- DEF contamination that shortens the new unit’s lifespan
- Emissions compliance issues that lead to derate mode
- Costly repeat repairs due to installation errors
It may be safe to change a DEF head unit on your own if you have the tools and technical skill. However, for most drivers, having a certified technician perform the job ensures correct installation, system resets, and long-term reliability.
It provides essential DEF data to the emissions system, ensuring compliance during operation.
Yes, inaccurate signals from the unit can trigger DEF system alerts.
False readings can cause unnecessary derates, compliance issues, and service interruptions.
OEM parts ensure proper fit, accurate readings, and long-term reliability with Cummins ISL engines.