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Cummins ISB 6.7L, B6.7 DEF Head Unit 2014-2024: OEM 04-37613-000

CUMMINS ISB 6.7L, B6.7 DEF HEAD UNIT 2014-2024: OEM 04-37613-000

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$950.00

AVAILABILITY IN STOCK
OEM NUMBER04-37613-000
PART TYPEDEF Head Unit
BRANDDuraWRX
ENGINE MAKECummins
ENGINE TYPEISB 6.7L, B6.7
YEAR2014-2024
PART NUMBERASPFL2382
APPLICATION NOTESThomas Built
ADDITIONAL NOTES11.5 Gallon

PRODUCT DESCRIPTION

This is a New, DuraWRX DEF Head Unit, DuraWRX part number ASPFL2382 ( OEM Part Number 04-37613-000 ).This part is primarily made for a Cummins ISB 6.7L, B6.7, production years 2014-2024, and comes with a Warranty.

Additional Notes: 11.5 Gallon

OEM NUMBERS

Primary OEM04-37613-000
Additional OEM04-31921-000, 04-34397-000, 04-35164-000, 04-36002-000, 04-37384-000, 04-37613-000

ADDITIONAL DETAILS

CONDITIONNew
UPC / Barcode00840490554979
WEIGHT4.00 LBS

SHIPPING OPTIONS

Ship Weight : 4.00 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 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, 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 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.

"This Product Doesn't Have a Core"


Keep your DEF system operating with confidence using the Cummins ISB 6.7L, B6.7 DEF Head Unit 2014–2024 (OEM 04-37613-000). Designed specifically for Cummins ISB 6.7L and B6.7 engines, this DEF head unit monitors diesel exhaust fluid level, temperature, and quality to support accurate system communication and dependable emissions control. Manufactured to meet OEM specifications, it provides precise fitment and reliable compatibility across the listed model years. Installing the correct DEF head unit helps maintain efficient aftertreatment performance and long-lasting system reliability.

FITMENT CHART

YEARMAKEENGINE(S)
2014Cummins ISB 6.7L B6.7
2015Cummins ISB 6.7L B6.7
2016Cummins ISB 6.7L B6.7
2017Cummins ISB 6.7L B6.7
2018Cummins ISB 6.7L B6.7
2019Cummins ISB 6.7L B6.7
2020Cummins ISB 6.7L B6.7
2021Cummins ISB 6.7L B6.7
2022Cummins ISB 6.7L B6.7
2023Cummins ISB 6.7L B6.7
2024Cummins ISB 6.7L B6.7

PEOPLE ALSO ASKS | BLOG(S)

The Cummins ISB 6.7L, B6.7 DEF Head Unit 2014-2024 OEM 04-37613-000 is a key component of the diesel emissions system, providing important information about the condition of the Diesel Exhaust Fluid (DEF) tank. One of the most searched topics related to DEF head units is how they help monitor DEF levels and support proper SCR system operation. Installing the correct OEM replacement helps maintain accurate system communication and dependable emissions control.

  • OEM 04-37613-000 is designed for 2014-2024 Cummins ISB 6.7L and B6.7 engine applications, providing factory-style fit and compatibility.
  • Monitors critical DEF tank data, including fluid level and temperature, to support proper emissions system operation.
  • Communicates with the vehicle's engine management system, helping ensure the SCR system receives accurate DEF information.
  • Built to OEM specifications, allowing seamless integration with the original DEF tank and electrical connections.
  • Manufactured with durable materials designed to withstand the demanding conditions of commercial diesel applications.
  • Direct-fit design simplifies installation, matching the original mounting configuration on compatible vehicles.
  • Engineered for dependable long-term operation, making it a reliable replacement for restoring proper DEF system monitoring.

The Cummins ISB 6.7L, B6.7 DEF Head Unit 2014-2024 OEM 04-37613-000 is an excellent replacement for maintaining the reliability of your diesel emissions system. With its OEM-quality construction, precise fitment, and accurate DEF monitoring capabilities, it helps keep your SCR system operating as designed while supporting dependable emissions control.

A DEF head unit is responsible for monitoring the level, temperature, and quality of Diesel Exhaust Fluid (DEF) within the tank. Because it operates in demanding conditions and is exposed to contaminants, temperature changes, and constant vehicle vibration, several factors can contribute to premature failure. Identifying these causes early can help maintain reliable SCR system operation.

  • Contaminated or poor-quality Diesel Exhaust Fluid (DEF) can interfere with sensor operation and reduce the accuracy of the head unit.
  • Exposure to extreme temperatures can place stress on the internal electronics and sensors over time.
  • Moisture intrusion or corrosion in electrical connectors can interrupt communication between the DEF head unit and the engine control module.
  • Damaged wiring harnesses or loose electrical connections may cause intermittent or complete sensor failure.
  • Dirt or debris inside the DEF tank can affect sensor readings and contribute to premature wear.
  • Constant vibration from heavy-duty operation can weaken internal components or electrical connections.
  • Ignoring DEF system warning lights or delaying repairs can allow minor issues to develop into complete head unit failure.

Routine inspection of the DEF system, using clean manufacturer-approved DEF, and addressing electrical or sensor issues promptly can help extend the life of the DEF head unit. Proper maintenance supports reliable SCR performance, accurate DEF monitoring, and consistent emissions system operation.

Yes, contaminated DEF can interfere with the operation of the DEF head unit and other SCR components. Using clean DEF helps maintain reliable system performance.

The DEF head unit helps monitor DEF temperature so the system can manage frozen DEF conditions correctly. This supports proper emissions system operation after startup.

Yes, loose or corroded connectors can interrupt communication between the DEF head unit and the engine control module. This may trigger DEF or SCR-related fault codes.

Common signs include incorrect DEF level readings, warning lights, SCR fault codes, or engine derate conditions. A diagnostic scan can help identify the source of the problem.

Cummins DEF Head Units

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