Mercedes-Benz NOx Sensor A0101539528 5WK96653C Exhaust Emission Monitoring

Fits 2010-2018 Mercedes-Benz W166, W164, W204, W212, X204 models, including ML, GLK, E-Class, C-Class with OM642 or OM651 diesel engines in 3.0L and 2.2L displacements. This NOx sensor monitors nitrogen oxide concentration in exhaust in real time, feeds data to ECU to optimize SCR urea injection, ensuring emissions compliance and improved fuel economy. OEM number A0101539528 (5WK96653C/5WK96653C) directly replaces factory part; install careful to route sensor wiring away from exhaust to avoid overheating damage. After replacement, use a diagnostic tool to reset and match to remove fault codes and restore system accuracy. This sensor is a core component of the aftertreatment system; long-term use may accumulate carbon or age out; timely replacement avoids torque limits or emissions exceedances.