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MTU / DETROIT DEF HEAD UNIT : OEM ASPNR0C-65177618

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$1,200.00

AVAILABILITY IN STOCK
OEM NUMBERASPNR0C-65177618
PART TYPEDEF Head Unit
BRANDDuraWRX
ENGINE MAKEMTU / Detroit
ENGINE TYPE
YEAR
PART NUMBERASPNR0C-65177618
APPLICATION NOTESElectrical Connector: Deutsch DTM04-3P and Deutsch DTM04-2P Sensor Type: Analog DEF Header Height (IN): 18
ADDITIONAL NOTESDEF Header, 100 MICRON, 18"

PRODUCT DESCRIPTION

This is a Remanufactured, DuraWRX DEF Head Unit, DuraWRX part number ASPNR0C-65177618 ( OEM Part Number ASPNR0C-65177618 ). This part is primarily made for a MTU / Detroit , and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

Additional Notes: DEF Header, 100 MICRON, 18"

OEM NUMBERS

Primary OEMASPNR0C-65177618
Additional OEM34807, 34811, 37547, ASPNR0C-65177618

ADDITIONAL DETAILS

CONDITIONNew
UPC / Barcode
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 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.

"This Product Doesn't Have a Core"


The MTU / Detroit DEF Head Unit: OEM ASPNR0C-65177618 delivers precise DEF fluid level and quality data to support smooth emissions system function and compliance. Built to OEM standards for consistent performance, this head unit provides accurate readings that help prevent derates and unexpected downtime. Its rugged design and exact fit make installation quick and reliable, offering a dependable solution for maintaining optimal diesel engine operation. Turn to Tamerx for trusted parts that deliver performance and durability.

PEOPLE ALSO ASKS | BLOG(S)

The DEF (Diesel Exhaust Fluid) head unit is essential for ensuring your MTU or Detroit diesel engines meet strict emissions regulations. It continuously monitors DEF fluid levels and temperature to maintain proper SCR (Selective Catalytic Reduction) system function. The MTU / Detroit DEF Head Unit OEM ASPNR0C-65177618 helps prevent engine derates, system faults, and downtime by delivering precise and reliable data.

Benefits of Choosing OEM ASPNR0C-65177618:

  • Built to meet MTU / Detroit OEM specifications for full system compatibility

  • Accurate monitoring of DEF fluid level and temperature

  • Helps maintain emissions compliance and system reliability

  • Designed for durability in harsh diesel operating environments

  • Direct-fit replacement for fast installation and minimal downtime

When the DEF head unit fails, your emissions system performance suffers, risking costly downtime and compliance issues. The MTU / Detroit DEF Head Unit OEM ASPNR0C-65177618 ensures your system runs smoothly with accurate, real-time data. Turn to TamerX Diesel Parts for trusted OEM solutions that keep your diesel engines compliant and operating at full capacity.

The DEF (Diesel Exhaust Fluid) head unit plays a vital role in monitoring DEF level, quality, and temperature to keep your emissions system operating correctly. When the DEF head unit begins to fail, it can lead to various system errors, drivability issues, and even costly engine derates if not addressed. Recognizing the early signs of failure can help you act before bigger problems develop.

Common Symptoms of a Failing DEF Head Unit:

  • Incorrect DEF Level Readings – The system may show that the DEF tank is empty or full inaccurately, even when fluid levels are correct.

  • Frequent “Service DEF System” Warnings – Recurring dashboard warnings or fault codes can point to sensor issues within the DEF head unit.

  • Engine Derates or Power Reduction – A malfunctioning head unit can cause the system to limit engine power to ensure emissions compliance.

  • Faulty DEF Quality Readings – The head unit may incorrectly detect poor DEF fluid quality, triggering system errors even with proper DEF.

  • Inconsistent DEF Temperature Readings – Temperature sensors inside the head unit may fail, resulting in incorrect or fluctuating readings.

  • Crystallization or Build-Up – White crystal deposits around the DEF tank opening or sensor area can interfere with proper sensor function.

  • Stored Diagnostic Trouble Codes (DTCs) – Scan tools may show active or stored codes related to DEF level, quality, or temperature sensor malfunctions.

A failing DEF head unit can quickly lead to emissions system problems, unexpected downtime, and costly repairs. If you notice any of these symptoms, it’s important to have the system diagnosed and repaired promptly. Early attention can prevent more serious issues and keep your emissions system functioning reliably.

Contamination, sensor wear, and electrical faults may interfere with accurate DEF readings.

Its integrated quality sensor measures the urea concentration to ensure DEF meets the required purity standards.

Incorrect data may trigger emission system errors, fault codes, and limit engine operation.

With proper care and clean DEF, the unit can function reliably for many years.