Mercedes-Benz Diesel Engine NOx Sensor A0081531128 5WK96656 Original Quality

Mercedes diesel nitrogen-oxide sensor directly replaces original numbers A0081531128 and 5WK96656; widely compatible with W166, W205, W212 and other models with OM642 or OM651 diesel engines. Core function is real-time monitoring of NOx concentration in exhaust, feeding data to the ECU to precisely control SCR urea injection, addressing issues of torque limits, power loss, and engine fault lights due to sensor inaccuracy. After installation, emissions performance can be effectively restored; professional technician installation recommended.