Fitment

Fits for:

• Caterpillar off-highway equipment (Tier 4 Final SCR systems)
• Engines: C4.4 / C7.1 / C9.3 / C13 / C15 / C18 industrial diesel engines
• Machines: backhoe loaders, wheel loaders, compactors, track-type tractors, industrial generators
• Position: Exhaust NOx sensor (tailpipe out / SCR outlet or inlet depending on system layout)
• OE / Cross References: 441-5130-03 / 441-5130 / SNS357 / 5WK97357 / A2C92692400-02 / 539-0118 family

FAQ

Q1: What is 441-5130-03 used for?
A1: It is a Caterpillar NOx emissions sensor used in SCR (Selective Catalytic Reduction) systems to measure nitrogen oxide levels in exhaust gas and support emissions control in Tier 4 Final engines.

Q2: What equipment uses this sensor?
A2: It is commonly used on Caterpillar engines such as C13, C15, C18 and machines like 910M, 914M wheel loaders, D3K–D5K tractors, and various compactors and backhoe loaders.

Q3: Is SNS357 the same as 441-5130-03?
A3: Yes. SNS357 is the sensor family code (aftermarket/OE supplier reference), while 441-5130-03 is the Caterpillar OE part number for the complete NOx sensor assembly.

Q4: What does this sensor do?
A4: It measures NOx levels in exhaust gas and sends real-time data to the ECU via J1939 communication, allowing precise DEF (AdBlue) dosing to reduce emissions and protect the SCR system.