
Cummins QSB 4.5L NOx Sensor 2011-2018: OEM 4359550
CUMMINS QSB 4.5L NOX SENSOR 2011-2018: OEM 4359550

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a Genuine New, Cummins NOx Sensor, Cummins part number 4359550-OE ( OEM Part Number 4359550 ).This part is primarily made for a Cummins QSB 4.5L, production years 2011-2018, and comes with a One Million Miles or One Year Warranty.
Additional Notes: Intlet Nox sensor
OEM NUMBERS
| Primary OEM | 4359550 |
| Additional OEM | 4359550, 5WK97406, A050Z208, NB1510 |
ADDITIONAL DETAILS
| CONDITION | Genuine New |
| UPC / Barcode | 00840490558632 |
| WEIGHT | 1.00 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 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, 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 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.
FITMENT CHART
| YEAR | MAKE | ENGINE(S) | ||||
|---|---|---|---|---|---|---|
| 2011 | Cummins | QSB 4.5L | ||||
| 2012 | Cummins | QSB 4.5L | ||||
| 2013 | Cummins | QSB 4.5L | ||||
| 2014 | Cummins | QSB 4.5L | ||||
| 2015 | Cummins | QSB 4.5L | ||||
| 2016 | Cummins | QSB 4.5L | ||||
| 2017 | Cummins | QSB 4.5L | ||||
| 2018 | Cummins | QSB 4.5L | ||||
PEOPLE ALSO ASKS | BLOG(S)
A faulty NOx sensor can interfere with how a diesel engine monitors exhaust emissions and evaluates its aftertreatment system. The Cummins QSB 4.5L NOx Sensor 2011-2018: OEM 4359550 measures nitrogen oxide levels in the exhaust stream, providing important information that helps the engine control system monitor emissions and identify potential SCR system problems.
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OEM 4359550 is intended for compatible 2011-2018 Cummins QSB 4.5L diesel applications.
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Nitrogen oxide measurement detects NOx concentrations in exhaust gases to support emissions monitoring.
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SCR efficiency monitoring provides information that may help the engine control system evaluate exhaust treatment effectiveness.
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Electronic signal transmission communicates sensor readings to the engine control system for processing and diagnostics.
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Exhaust gas monitoring helps identify abnormal NOx levels that may indicate aftertreatment issues.
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Integrated sensing technology measures nitrogen oxide concentrations under suitable operating conditions.
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High-temperature compatibility allows the sensing element to operate in demanding diesel exhaust environments.
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Diagnostic fault detection helps the control system recognize irregular readings or sensor-related electrical problems.
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Application-specific connections support proper installation and communication with compatible Cummins QSB 4.5L systems.
The Cummins QSB 4.5L NOx Sensor OEM 4359550 helps provide the exhaust emissions data needed for effective SCR system monitoring and troubleshooting. Customers searching for a Cummins QSB 4.5L NOx sensor, diesel exhaust NOx sensor, Cummins SCR sensor replacement, nitrogen oxide sensor, or OEM 4359550 can find this replacement component at TamerX Diesel Parts for compatible 2011-2018 applications.
A failing NOx Sensor can cause inaccurate nitrogen oxide (NOx) readings, emissions system warnings, and problems with diesel aftertreatment operation. Since NOx sensors monitor exhaust emissions and help the Engine Control Module (ECM) evaluate Selective Catalytic Reduction (SCR) system efficiency, recognizing early signs of sensor failure can help prevent recurring fault codes and engine derate conditions.
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Check engine light activation: A malfunctioning NOx Sensor may trigger diagnostic trouble codes and illuminate the check engine light.
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Incorrect NOx readings: Abnormally high, low, or inconsistent NOx measurements may indicate a faulty sensor or problems with its electrical connections.
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SCR system warning messages: The vehicle may display emissions-related warnings when the ECM detects unreliable NOx sensor data or abnormal SCR performance.
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Reduced engine power: Persistent NOx sensor or aftertreatment faults can activate engine derate strategies that limit power until the issue is resolved.
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Sensor communication faults: Damaged wiring, corroded connectors, or internal electronic failures can interrupt communication between the NOx Sensor and ECM.
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Slow sensor response: A deteriorating NOx Sensor may respond slowly to changes in exhaust conditions, resulting in delayed or inaccurate emissions measurements.
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Recurring aftertreatment fault codes: Repeated NOx-related diagnostic codes after clearing them may indicate an unresolved sensor, wiring, or SCR system problem.
A failing NOx Sensor can affect emissions monitoring and contribute to aftertreatment system warnings, but these symptoms do not always confirm sensor failure. Checking diagnostic trouble codes, monitoring live NOx readings, inspecting electrical connections, and evaluating DEF dosing and SCR operation can help determine whether NOx Sensor replacement is necessary.
A faulty NOx sensor generally does not directly cause hard starting because its primary function is exhaust emissions monitoring. If starting problems occur alongside NOx sensor faults, the fuel system, battery, and other engine components should also be inspected.
The sensor uses a heated sensing element that must reach its required operating temperature to measure nitrogen oxides accurately. Until the sensor is ready, the engine control system may temporarily rely on other operating information.
A communication failure can prevent the engine control module from receiving valid NOx measurements. This may trigger diagnostic fault codes, emissions warnings, or operating restrictions depending on the engine configuration.
Depending on the sensor's location and the engine's control strategy, incorrect NOx readings may affect DEF dosing decisions. However, excessive DEF consumption can also result from dosing system faults, engine operating conditions, or other aftertreatment problems.






































