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DEF Sensor : OEM ASP01RS11-FF

DEF SENSOR : OEM ASP01RS11-FF

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WARRANTY
1M MILES OR 1 YEAR

$900.00

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AVAILABILITY IN STOCK
OEM NUMBERASP01RS11-FF
PART TYPEDEF Sensor
BRANDDuraWRX
ENGINE MAKE
ENGINE TYPE
YEAR
PART NUMBERASP01RS11-FF
ADDITIONAL NOTESDEF Sensor, Level, Analog

PRODUCT DESCRIPTION

This is a New, DuraWRX DEF Sensor, DuraWRX part number ASP01RS11-FF ( OEM Part Number ASP01RS11-FF ). This part is primarily made for a , and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

Additional Notes: DEF Sensor, Level, Analog

OEM NUMBERS

Primary OEMASP01RS11-FF
Additional OEMASP01RS11-FF, ASP5x10-xx06x11 Series

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.

"This Product Doesn't Have a Core"


The DEF Sensor OEM ASP01RS11-FF is a dependable solution for monitoring diesel exhaust fluid levels and quality with accuracy and consistency. Designed to meet OEM specifications, it ensures smooth communication with your vehicle’s emissions system, helping maintain proper SCR function and emissions compliance. Built for durability in harsh environments, this sensor is ideal for restoring system reliability and avoiding costly downtime. A trusted replacement to keep your DEF system performing at its best.

PEOPLE ALSO ASKS | BLOG(S)

Diesel Exhaust Fluid (DEF) systems play an essential role in reducing harmful emissions from modern diesel engines. At the heart of this system is the DEF sensor, which monitors fluid quality, level, and temperature. The DEF Sensor OEM ASP01RS11-FF is engineered to provide precise readings that support the operation of the SCR (Selective Catalytic Reduction) system, ensuring vehicles remain compliant with emissions standards.

Key Functions of the DEF Sensor OEM ASP01RS11-FF:

  • Monitors DEF Fluid Level
    Ensures accurate data is sent to the engine control module for proper dosing.

  • Checks DEF Temperature
    Detects whether DEF is at the optimal temperature for injection.

  • Measures DEF Quality
    Identifies contaminants or diluted fluid that could affect SCR system efficiency.

  • Triggers Warnings for Low Fluid or Poor Quality
    Helps prevent damage or non-compliance by alerting drivers early.

  • Supports Regulatory Compliance
    Plays a direct role in maintaining EPA-mandated emissions performance.

A dependable DEF sensor like the OEM ASP01RS11-FF is crucial for the correct function of your emissions control system. If your vehicle is experiencing DEF-related fault codes, it may be time for a replacement. At Tamerx Diesel Parts, we offer the OEM ASP01RS11-FF to help ensure your system stays accurate and compliant. Invest in quality parts that keep your diesel engine running clean.

The DEF (Diesel Exhaust Fluid) sensor is a critical part of your vehicle’s emissions system, responsible for monitoring fluid quality, temperature, and level. When it starts to fail, it can disrupt DEF dosing and trigger various performance issues. Spotting the early signs of a bad DEF sensor can help you avoid derates, downtime, and compliance problems.

Common Symptoms of a Failing DEF Sensor:

  • Check Engine Light or DEF Warning – A faulty sensor often triggers warning lights or fault codes related to emissions or fluid levels.

  • Inaccurate DEF Readings – Sudden changes in DEF levels or quality readings despite proper fluid levels may indicate a sensor issue.

  • Engine Derate or Power Loss – The ECM may reduce engine power if the sensor reports incorrect DEF data, believing the system is compromised.

  • Failure to Start After Shutdown – In severe cases, the system may prevent restarting the engine if it believes DEF is missing or contaminated.

  • Unexpected Regeneration Issues – Sensor failure can interfere with proper DPF regen cycles, leading to increased soot buildup.

  • DEF System Fault Codes – Diagnostic scans may show specific codes related to DEF temperature, quality, or level sensors.

A failing DEF sensor can lead to frustrating and costly issues if left unaddressed. If you notice DEF warnings, inconsistent readings, or reduced engine performance, it’s important to have the sensor tested and replaced if needed. Keeping this component in good working order is key to maintaining emissions compliance and overall engine reliability.

Periodic system checks and clean DEF usage help maintain sensor accuracy and function.

The engine may limit power or enter a derate condition to protect emissions compliance.

With clean DEF and proper use, it can last several years before showing degradation.

Some vehicle systems may allow recalibration through diagnostic tools if permitted by the ECM.

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