FITMENT
Compatible with Opel and Vauxhall diesel vehicles equipped with SCR (Selective Catalytic Reduction) AdBlue emission systems requiring NOx monitoring.
Common applications include Euro 5 / Euro 6 diesel engines using reference:

• SNS418B
• 55501373
• 5WK97418 (Continental sensor family)

Typically used in exhaust aftertreatment systems for emissions control compliance.

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 control AdBlue/DEF injection and reduce emissions.

Q2: Where is it installed?
A2: It is installed in the exhaust system, usually before or after the SCR catalytic converter depending on engine 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 SNS418B interchangeable with 55501373?
A4: Yes, SNS418B is the sensor model designation and 55501373 is the OEM number used for the same SCR NOx sensor system.