FITMENT
Universal-type NOx sensor commonly used across multiple diesel vehicles equipped with SCR (Selective Catalytic Reduction) systems.
Suitable for Euro 5 / Euro 6 diesel engines that utilize Bosch-style NOx sensors with part numbers 0281007930 / 0281007920.

FAQ
Q1: What is the function of this NOx sensor?
A1: It detects nitrogen oxide (NOx) levels in the exhaust system and sends real-time data to the ECU to regulate AdBlue/DEF injection for emissions control.

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

Q3: What are symptoms of failure?
A3: Engine warning light, SCR/AdBlue system faults, NOx sensor-related diagnostic codes, reduced engine performance, or limp mode activation.

Q4: Is it vehicle-specific?
A4: Yes. Although these are widely used reference numbers, exact compatibility depends on engine model, ECU calibration, and SCR system layout.