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Cummins NOx Sensor 2018-2024: OEM 4326868

CUMMINS NOX SENSOR 2018-2024: OEM 4326868

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$395.00

AVAILABILITY IN STOCK
OEM NUMBER4326868
PART TYPENOx Sensor
BRANDCummins
ENGINE MAKECummins
ENGINE TYPE
YEAR2018-2024
PART NUMBER4326864-OE

PRODUCT DESCRIPTION

This is a Genuine New, Cummins NOx Sensor, Cummins part number 4326864-OE ( OEM Part Number 4326868 ).This part is primarily made for a Cummins , production years 2018-2024, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM4326868
Additional OEM4326868

ADDITIONAL DETAILS

CONDITIONGenuine New
UPC / Barcode00840490554719
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"


Engine performance relies on accurate emissions data, and the Cummins NOx Sensor 2018–2024 (OEM 4326868) delivers exactly that. Designed to monitor nitrogen oxide levels in the exhaust stream, this sensor plays a key role in supporting proper aftertreatment operation. Built to meet OEM specifications, it ensures reliable fitment and consistent communication with the engine system. Installing the correct NOx sensor helps keep emissions systems running efficiently and dependably.

FITMENT CHART

YEARMAKEENGINE(S)
2018Cummins
2019Cummins
2020Cummins
2021Cummins
2022Cummins
2023Cummins
2024Cummins

PEOPLE ALSO ASKS | BLOG(S)

Precise emissions monitoring is essential for maintaining proper diesel engine operation, and the NOx sensor plays a critical role in that process. The Cummins NOx sensor measures nitrogen oxide levels in the exhaust stream and sends real-time data to the engine control module (ECM). This information allows the system to adjust Diesel Exhaust Fluid (DEF) dosing and maintain efficient aftertreatment performance.

  • Monitors NOx Emissions in Real Time
    The sensor continuously measures nitrogen oxide levels in the exhaust, giving the ECM accurate data to track emissions output.
  • Enables Precise DEF Dosing
    By analyzing NOx levels, the system can determine how much DEF is needed for the SCR process, helping convert harmful gases into safer compounds.
  • Acts as a Feedback Loop for SCR Efficiency
    The sensor verifies that emissions are being properly reduced by comparing NOx levels before and after treatment, ensuring the system is functioning correctly.
  • Supports Engine Performance and Compliance
    Accurate NOx data allows the ECM to adjust engine parameters, helping maintain efficient operation while meeting emissions standards.
  • Designed for Cummins Applications (2018–2024)
    Built to OEM 4326868 specifications, this sensor is engineered for compatibility with Cummins engines and integrates seamlessly with the aftertreatment system.

The NOx sensor is a small but essential part of the emissions system. In Cummins engines, a reliable sensor helps ensure accurate exhaust monitoring, supports SCR performance, and keeps the entire aftertreatment system operating efficiently over time.

A NOx sensor is responsible for measuring nitrogen oxide levels in the exhaust system and helping the SCR system adjust Diesel Exhaust Fluid (DEF) dosing. When the sensor begins to fail, it can send inaccurate data to the engine control module, leading to emissions issues and performance problems. Recognizing the symptoms early can help prevent further damage to the aftertreatment system.

  • An illuminated check engine light is one of the most common signs, often with codes related to NOx sensor performance or communication.
  • An SCR or emissions system warning message may appear due to incorrect NOx readings.
  • Increased DEF consumption can occur as the system attempts to compensate for inaccurate data.
  • Reduced engine power or derate mode may be triggered if emissions are not being properly controlled.
  • Failed emissions testing may result from incorrect NOx level readings.
  • Poor fuel efficiency can develop due to improper DEF dosing and system imbalance.
  • Persistent or recurring fault codes may indicate a failing or unresponsive sensor.

A failing NOx sensor can impact both emissions compliance and overall engine operation. Prompt diagnosis and replacement help restore accurate readings, ensure proper DEF dosing, and keep the aftertreatment system functioning reliably.

Yes, damaged wiring or poor connections can disrupt communication.

It helps maintain correct emissions levels by providing precise feedback.

Yes, periodic checks can help ensure it is functioning properly.

Delayed readings can reduce the system’s ability to adjust emissions effectively.

Cummins NOx Sensors