FITMENT
Compatible with Mercedes-Benz heavy-duty trucks equipped with SCR (Selective Catalytic Reduction) AdBlue emission systems requiring NOx monitoring.
Common applications include:

• Mercedes-Benz Actros MP4 / MP5
• Mercedes-Benz Atego
• Mercedes-Benz Axor
• Mercedes-Benz Arocs (selected Euro 6 variants)
  Using reference numbers:
• A0111537128 / A0111537128
• SNS3044
• 5WK96642B (Continental/Bosch sensor family)

Typically installed in SCR exhaust aftertreatment systems for emission control and AdBlue dosing accuracy.

FAQ
Q1: What is the function of this NOx sensor?
A1: It measures nitrogen oxide (NOx) levels in the exhaust system and sends real-time data to the ECU to regulate AdBlue/DEF injection and reduce emissions.

Q2: Where is it installed?
A2: It is installed in the SCR exhaust system, usually before or after the catalytic converter depending on vehicle configuration.

Q3: What are symptoms of failure?
A3: Check engine light, SCR/AdBlue system warnings, NOx sensor fault codes, reduced engine performance, or limp mode activation.

Q4: Is SNS3044 interchangeable with SNS3042?
A4: They are closely related within the same Mercedes NOx sensor family, but exact compatibility depends on engine variant and ECU calibration.