Fitment

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

• Opel Astra K 1.6 CDTi diesel (2015–2019)
• Opel Astra K Sports Tourer 1.6 CDTi diesel
• Vauxhall Astra K 1.6 CDTi diesel
• Selected Opel / Vauxhall GM diesel SCR applications

OE reference
55485497
55495597 (related variant)
SNS718
A2C15954900-01
A2C15954900

FAQ

What is this NOx sensor used for

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

Is this inlet or outlet sensor

It is commonly used as NOx sensor positioned in SCR system and may function as upstream or downstream depending on configuration

Are all 55485497 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