奔驰氮氧化物传感器 5WK96718A 22219281 高效减排，稳定耐用

When a Mercedes-Benz shows engine diagnostic light on, NOx sensor signs, or reduced power with elevated fuel consumption, it usually indicates NOx sensor aging or failure; it cannot accurately monitor NOx concentration, affecting SCR system operation. This sensor, when functioning properly, provides real-time NOx content to the ECU to finely adjust injections and SCR for compliant emissions and steady power. This product fits multiple Mercedes-Benz models; OEM numbers 5WK96718A, 5WK96718B, and 22219281. Disconnect power before install; ensure sensor mounting is clean; tighten torque per manufacturer standards to avoid signal interference.