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Cummins  |  SKU: 0451108

0451108 | Genuine Cummins® NOx Nitrogen Oxide Sensor

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Description:
A NOx (Nitrogen Oxide) sensor 0451108 is an electronic device used in internal combustion engines (especially diesel engines) to detect and measure the concentration of nitrogen oxides (NO and NO₂) in the exhaust gases. These pollutants are harmful to human health and the environment, so monitoring and controlling them is crucial for meeting emissions regulations. NOx Nitrogen Oxide Sensor For ISB 6.7 ( ISB6.7-200, ISB6.7-220, ISB6.7-240, ISB6.7-260, ISB6.7-280 ), ISX 11.9, ISX 11.9G, ISX 15.0

Part Number
: 0451108
Condition: New
Manufacture/Brand: Cummins

Specifications 0451108:

Position: Tail Pipe

Connector Gender: Female
Terminal Gender: Male
Connector/Terminal Configuration: 4 Pin
Wire Gauge Measurements: 22 GU
Wire Harness Length: 920 mm



Fits 0451108 For Cummins engine systems ISB 6.7 ( ISB6.7-200, ISB6.7-220, ISB6.7-240, ISB6.7-260, ISB6.7-280 ), ISX 11.9, ISX 11.9G, ISX 15.0

Make Model Year
Peterbilt 320 2010 - 2015
Peterbilt 365 2010 - 2015
Peterbilt 367 2010 - 2015
Peterbilt 384 2010 - 2015
Peterbilt 386 2010 - 2015
Peterbilt 387 2010 - 2011
Peterbilt 388 2010 - 2015
Peterbilt 389 2010 - 2015
Peterbilt 567 2014 - 2015
Peterbilt 579 2013 - 2015
Peterbilt 587 2011 - 2015
International 4300 2014 - 2015
Freightliner 108SD 2012 - 2015
Western Star 4900EX 2011 - 2015
Western Star 4900FA 2011 - 2015
Western Star 4900SA 2010 - 2015
International 5900i 2012
Western Star 6900XD 2013
Blue Bird All American FE 2010 - 2015
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Freightliner Argosy 2012
Pierce Mfg. Inc. Arrow XT 2014
Freightliner B2 2010 - 2015
Kenworth C500 2010 - 2015
Freightliner Cascadia 2010 - 2015
Freightliner Columbia 2012 - 2014
Freightliner Coronado 2011 - 2015
Pierce Mfg. Inc. Custom 2012
Mack CXU 2014 - 2015
Oshkosh Motor Truck Co. H 2011
Freightliner M2 106 2010 - 2015
Freightliner MT45 2010 - 2015
Freightliner MT55 2010 - 2015
International ProStar 2010 - 2015
Oshkosh Motor Truck Co. S 2011
Kenworth T2000 2010 - 2011
Kenworth T660 2010 - 2015
Kenworth T680 2013 - 2015
Kenworth T700 2011 - 2015
Kenworth T800 2010 - 2015
Kenworth T880 2015
Pierce Mfg. Inc. Velocity 2013 - 2014
Volvo VNL 2010 - 2015
Kenworth W900 2010 - 2015
Freightliner XB Line 2012 - 2015
Freightliner XB Straight Rail 2010 - 2015
Freightliner XC Lowered Rail 2011 - 2015
Freightliner XC Modular Rail 2010 - 2015
Freightliner XC Raised Rail 2010 - 2015
Freightliner XC Straight Rail 2010 - 2015



Purpose of using 0451108:

1. Emissions Control

Measures NOx levels in the exhaust to ensure they stay within legal limits (EPA, Euro 6, etc.)
Helps reduce harmful pollutants that contribute to:
Air pollution
Smog
Acid rain
Respiratory and cardiovascular problems

2. Enables SCR (Selective Catalytic Reduction) System

SCR uses Diesel Exhaust Fluid (DEF/AdBlue) to convert NOx into harmless nitrogen (N₂) and water (H₂O).
The NOx sensor provides feedback to control how much DEF to inject.
Ensures proper dosing to avoid:
Overuse (wasting DEF)
Underuse (failing emissions requirements)

3. Engine Performance Optimization

Works with the ECU (Engine Control Unit) to adjust:
Air-fuel ratio
Exhaust gas recirculation (EGR)
Combustion timing
Helps balance fuel economy, power, and emissions

4. Diagnostic and Safety Functions

Detects when emissions systems (like SCR or DPF) are failing or underperforming
Triggers check engine lights, fault codes, or limp mode if NOx levels exceed safe limits
Required for onboard diagnostics (OBD) compliance


Signs of a Bad NOx Nitrogen Oixide Sensor 0451108:

  • Check engine light (MIL)

  • Poor fuel efficiency

  • High DEF (AdBlue) consumption

  • Failed emissions tests

  • Error codes like P2201, P229F, P20EE, etc.


About the Manufacturer – Cummins:

Cummins is a leading American manufacturer of diesel and natural gas engines, as well as power generation systems and emissions solutions. Founded in 1919 and headquartered in Columbus, Indiana, Cummins is known globally for its durable, high-performance engines used in trucks, buses, construction equipment, agriculture, and power systems.

The brand is widely respected for its innovation in clean diesel technology, including aftertreatment systems, turbochargers, and advanced electronics that help reduce emissions while maximizing engine efficiency and reliability.