Fitment

Fits for:

• FAW heavy-duty diesel trucks (various CA series models)
• FAW Jiefang Euro 5 / Euro 6 SCR (AdBlue) systems
• Weichai engine platforms with SCR emissions control
• Engine: Heavy-duty diesel engines with SCR aftertreatment system
• Position: Exhaust NOx sensor (inlet or outlet depending on system layout)
• OE / Cross References: SNS3501 / A3C03687700-01 / A3C03687700 / 5WK9-type NOx sensor family / WEICHAI SCR applications / Continental-style sensor platform

FAQ

Q1: What is SNS3501 used for?
A1: SNS3501 is a NOx (nitrogen oxide) sensor used in SCR diesel exhaust systems to monitor emissions and control AdBlue dosing for FAW and Weichai-equipped trucks.

Q2: Which vehicles use this sensor?
A2: It is commonly used on FAW Jiefang heavy-duty trucks and diesel vehicles equipped with SCR (Selective Catalytic Reduction) systems, often paired with Weichai engines.

Q3: Is this inlet or outlet sensor?
A3: It can be used as either upstream (inlet) or downstream (outlet) NOx sensor depending on exhaust configuration and ECU setup.

Q4: What does this sensor do?
A4: It measures nitrogen oxide (NOx) levels in exhaust gases and sends signals to the ECU to adjust urea (AdBlue) injection, reducing emissions and ensuring compliance with regulations.