Fitment
Compatible with small diesel Euro 6 SCR emission systems

Vehicle applications include:
Smart Fortwo
Smart Forfour
Other Smart vehicles using OEM part number 5WK96622A / 5WK96622A

FAQ

Q1: What is the function of this NOx sensor?
A1: It measures nitrogen oxide levels in diesel exhaust and sends data to the SCR system to control AdBlue dosing and reduce emissions.

Q2: Where is this sensor installed?
A2: It is installed in the exhaust aftertreatment system, typically before or after the SCR catalyst depending on vehicle configuration.

Q3: Is part number matching required?
A3: Yes, exact OEM part number 5WK96622A / 5WK9 6622A is required for correct compatibility.

Q4: Is this used in Smart diesel models?
A4: Yes, it is commonly used in Smart Fortwo and Forfour diesel Euro 6 applications.

Q5: What are common failure symptoms?
A5: Engine warning light, AdBlue/SCR system faults, NOx sensor error codes, or reduced engine performance mode.