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Cummins ISX12, QSX Sensor Temperature 2014-2018: OEM 4384812

CUMMINS ISX12, QSX SENSOR TEMPERATURE 2014-2018: OEM 4384812

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$249.00

AVAILABILITY IN STOCK
OEM NUMBER4384812
PART TYPESensor Temperature
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEISX12, QSX
YEAR2014-2018
PART NUMBER4384812TX

PRODUCT DESCRIPTION

This is a New, Tamerx Sensor Temperature, Tamerx part number 4384812TX ( OEM Part Number 4384812 ).This part is primarily made for a Cummins ISX12, QSX, production years 2014-2018, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM4384812
Additional OEM1906310PE, 4307101, 4384812

ADDITIONAL DETAILS

CONDITIONNew
UPC / Barcode
WEIGHT1.00 LBS

SHIPPING OPTIONS

Ship Weight : 1.00 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"


Designed for 2014–2018 Cummins ISX12 and QSX engines, this OEM 4384812 temperature sensor delivers precise temperature data to support effective engine management and prevent overheating. Its direct-fit design ensures a seamless replacement, while the robust construction ensures reliable performance and long-term durability under heavy-duty conditions. Trust it to help maintain efficient operation and engine health.

FITMENT CHART

YEARMAKEENGINE(S)
2014Cummins ISX12 QSX
2015Cummins ISX12 QSX
2016Cummins ISX12 QSX
2017Cummins ISX12 QSX
2018Cummins ISX12 QSX

PEOPLE ALSO ASKS | BLOG(S)

Accurate temperature monitoring is essential to the proper operation and longevity of modern diesel engines — and the Cummins ISX12 / QSX Temperature Sensor (OEM 4384812) plays a vital role in providing that critical data. For ISX12 and QSX engines built between 2014 and 2018, this sensor ensures the engine control system receives reliable temperature information, enabling correct adjustments for combustion, cooling, and emissions. Using the correct OEM sensor helps keep engine performance consistent, safe, and efficient.

This temperature sensor supports vital engine functions — here’s why it matters:

  • Precise Temperature Monitoring – Continuously tracks engine or coolant temperature and delivers accurate readings to the control module for proper regulation.

  • Prevents Overheating and Component Damage – By providing dependable temperature feedback, the sensor helps avoid overheating and protects internal engine parts from heat-related stress or damage.

  • Supports Efficient Combustion and Emissions Control – With correct temperature data, the engine management system can optimize fuel delivery, timing, and emissions systems across different load and ambient conditions.

  • OEM-Grade Fit and Durability – As OEM 4384812, this sensor meets original manufacturer specifications, ensuring proper installation, reliable performance, and long-term resistance to wear.

  • Reduces Sensor-Related Faults and Diagnostic Errors – A functioning temperature sensor helps prevent false warnings or error codes, making diagnostics more dependable and avoiding unnecessary maintenance.

Replacing a failing or inaccurate temperature sensor is a smart step to ensure long-term reliability and performance of your diesel engine. The Cummins ISX12 / QSX Temperature Sensor (OEM 4384812) delivers accurate, OEM-standard monitoring, helping maintain optimal temperature control, protect critical components, and support efficient engine operation. For those seeking a trustworthy replacement part, Tamerx provides this sensor as a high-quality solution engineered for heavy-duty usage and long-term engine health.

A temperature sensor plays an essential role in monitoring engine temperature and sending accurate data to the engine control module (ECM). When well-maintained, it helps ensure proper fuel delivery, cooling system performance, and emission control. Although temperature sensors are designed for durability, regular care can significantly extend their lifespan and prevent unexpected failures.

Maintenance Tips to Extend the Life of a Temperature Sensor

  • Keep Electrical Connections Clean
    Inspect the sensor’s wiring and connector for corrosion, dirt, or loose pins. Clean, secure connections ensure consistent signal transmission.

  • Check for Coolant or Oil Leaks
    Leaks near the sensor can cause contamination or overheating, leading to premature sensor failure.

  • Use High-Quality Engine Fluids
    Clean, fresh coolant and oil reduce buildup and maintain stable operating temperatures, protecting the sensor.

  • Avoid Overheating Events
    Maintain the cooling system—including the radiator, thermostat, and coolant levels—to prevent excessive heat that can damage the sensor.

  • Inspect During Routine Maintenance
    Have the sensor checked during scheduled services, especially when replacing coolant or working near engine components.

  • Replace Worn Seals or Gaskets
    Damaged seals can allow moisture and contaminants to reach the sensor connection, shortening its lifespan.

With simple, consistent maintenance, you can significantly extend the life of a temperature sensor. Clean electrical connections, high-quality fluids, and a well-maintained cooling system all contribute to accurate temperature readings and reliable engine performance. Proactive care keeps your vehicle running smoothly while preventing costly issues down the road.

Typically no — the replacement involves removing the old sensor, installing the new one in the correct port, and reconnecting wiring. It can be done by someone with reasonable mechanical skill.

Yes — clearing previous error codes and allowing the engine’s control system to recalibrate or relearn the new sensor data is usually required.

Yes — incorrect temperature readings may lead to improper fuel-air mixture or timing, which can result in inefficient combustion and reduced fuel efficiency.

It’s risky — without reliable temperature monitoring, the engine could overheat, run inefficiently, or suffer long-term damage under load or stress.

Cummins Sensor Temperatures

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