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CAT / Perkins DEF Head Unit : OEM ASP-918-1795-13

CAT / PERKINS DEF HEAD UNIT : OEM ASP-918-1795-13

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$895.00

CORE CHARGE:

$250.00
iCORE DISCLAIMER: The CORE charge is a 30 day hold and will not be processed as long as the CORE is returned within 30 days. If you do not have a CORE or fail to return the CORE within 30 days, the CORE charge hold amount will be processed at that time.

AVAILABILITY IN STOCK
OEM NUMBERASP-918-1795-13
PART TYPEDEF Head Unit
BRANDDuraWRX
ENGINE MAKECAT / Perkins
ENGINE TYPE
YEAR
PART NUMBERASP-918-1795-13
APPLICATION NOTESElectrical Connector: Deutsch DT4 Sensor Type: Digital (canbus) DEF Header Height (IN): 13
ADDITIONAL NOTESDEF Header, Helical Heater, 40 MICRON, 13"

PRODUCT DESCRIPTION

This is a New, DuraWRX DEF Head Unit, DuraWRX part number ASP-918-1795-13 ( OEM Part Number ASP-918-1795-13 ). This part is primarily made for a CAT / Perkins , and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

Additional Notes: DEF Header, Helical Heater, 40 MICRON, 13"

OEM NUMBERS

Primary OEMASP-918-1795-13
Additional OEM5356923, 5913428, ASP-918-1795-13, T431863, T434680

ADDITIONAL DETAILS

CONDITIONNew
UPC / Barcode
WEIGHT3.00 LBS

SHIPPING OPTIONS

Ship Weight : 3.00 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.


Keep your emissions system operating at peak efficiency with this DEF Head Unit for CAT and Perkins applications, OEM ASP-918-1795-13. Designed to monitor and manage DEF levels, temperature, and quality, this unit plays a crucial role in SCR functionality and emissions compliance. Built to OEM specifications, it ensures accurate performance, a direct fit, and long-term durability. Choose Tamerx for trusted emissions components that keep your equipment running clean and compliant.

PEOPLE ALSO ASKS | BLOG(S)

Diesel Exhaust Fluid (DEF) systems are essential for controlling emissions in modern diesel engines. At the center of this system is the DEF head unit, a component responsible for managing fluid levels and temperature to ensure proper delivery into the exhaust system. The CAT / Perkins DEF Head Unit OEM ASP-918-1795-13 is specifically designed to support reliable DEF system performance in compatible equipment.

Key Functions of the OEM ASP-918-1795-13 DEF Head Unit:

  • Monitors DEF Level
    Helps the control module determine when DEF levels are low and alerts the operator.

  • Temperature Sensing
    Tracks DEF fluid temperature to prevent freezing or overheating, protecting system integrity.

  • Integrated Suction Tube
    Draws DEF from the tank and routes it to the dosing system for accurate injection.

  • Heater Element Support
    Assists in maintaining optimal DEF temperature in cold weather conditions.

  • OEM Fit and Compatibility
    Engineered for direct replacement in CAT and Perkins applications requiring this specific part number.

The CAT / Perkins DEF Head Unit OEM ASP-918-1795-13 is a vital component in ensuring that your DEF system operates as intended. With its multi-functional design and dependable build, it supports accurate DEF monitoring and delivery, helping reduce downtime and prevent emissions-related issues. For reliable replacements, trust Tamerx Diesel Parts to supply OEM components that keep your system running smoothly.

The DEF (Diesel Exhaust Fluid) head unit plays an essential role in emissions control by managing the flow of DEF into the SCR (Selective Catalytic Reduction) system. Like any component in the emissions system, the DEF head unit can wear out or fail prematurely without proper care. Implementing a few smart maintenance practices can go a long way in preserving its function and extending its lifespan.

Tips to Extend the Life of a DEF Head Unit:

  • Use High-Quality DEF – Always use certified DEF fluid to prevent contamination that can clog or corrode the head unit.

  • Store DEF Properly – Keep DEF away from extreme heat or freezing temperatures to maintain fluid integrity and avoid sensor issues.

  • Avoid Overfilling the DEF Tank – Overfilling can cause fluid to enter the head unit vents or wiring, leading to corrosion or sensor failure.

  • Inspect for Cracks or Leaks – Regularly check the DEF head unit and hoses for physical damage or leaks that can affect function.

  • Clean Around the Fill Port – Keep dirt and debris away from the DEF fill area to prevent contamination when refueling.

  • Service According to Manufacturer Guidelines – Follow recommended service intervals and diagnostic checks to catch issues early.

  • Monitor Warning Lights – Don’t ignore DEF system warning lights—addressing them quickly can prevent larger system failures.

A well-maintained DEF head unit supports clean emissions and reliable engine performance. By using quality DEF, practicing clean handling, and staying on top of inspections and service, you can significantly increase the life of your DEF system and avoid costly replacements. Prevention is always more efficient than repair.

Under normal use and proper DEF handling, it can last over 100,000 miles without issue.

Prolonged exposure to contaminated DEF or water ingress can lead to internal corrosion and failure.

Inaccurate readings may indicate sensor failure, electrical issues, or crystallized DEF around the probe.

Cleaning requires flushing the DEF tank with deionized water and gently removing buildup from sensor areas.

 

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