FITMENT
Compatible with Opel / Vauxhall diesel vehicles equipped with SCR (Selective Catalytic Reduction) AdBlue emission systems requiring NOx monitoring.
Common applications include:

• Opel Insignia A (diesel SCR variants)
• Opel Antara
• Vauxhall Insignia / Antara diesel models
• Selected GM/Opel Euro 5 / Euro 6 SCR diesel systems
  Using reference numbers:
• 55589458 (OEM reference)
• 5WK97419 (Continental/Bosch sensor family cross-reference)
• Related SCR NOx sensor variants depending on calibration

Designed for exhaust aftertreatment systems to monitor NOx emissions and ensure proper AdBlue dosing for compliance.

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

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

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

Q4: Is 55589458 the same as 5WK97419?
A4: Yes, 55589458 is the OEM reference number and 5WK97419 is the supplier/manufacturer cross-reference for the same NOx sensor unit.