Fitment

Opel Vauxhall diesel vehicles with SCR AdBlue Euro 5 Euro 6 emission system including

• Opel Zafira Tourer C 1.6 CDTi diesel
• Opel Cascada 2.0 CDTi diesel
• Opel Insignia B 1.6 CDTi diesel (selected SCR versions)
• Vauxhall Zafira Tourer C 1.6 CDTi diesel
• Vauxhall Cascada 2.0 CDTi diesel
• Selected GM diesel SCR applications with rear NOx monitoring system

OE reference
55497261
5WK97263
855599
855610

FAQ

What is this NOx sensor used for

It measures nitrogen oxide levels in diesel exhaust and sends signals to ECU for SCR AdBlue emission control system

Is this inlet or outlet sensor

This part is typically used as outlet NOx sensor after SCR catalyst depending on exhaust layout

Are all 55497261 sensors interchangeable

No Opel Vauxhall NOx sensors are ECU coded and must match exact OE number and calibration version

What system does it work with

SCR Selective Catalytic Reduction system using AdBlue injection for Euro 5 and Euro 6 diesel emission compliance

What are common failure symptoms

Engine warning light SCR AdBlue fault reduced power limp mode NOx sensor communication error emission efficiency faults