北京奔驰E级W212 3.5L后氧传感器 0065422118 / 65422118

This rear oxygen sensor for Beijing Benz E-Class W212 chassis models, fits 2010-2016 versions powered by 3.5L M272/M276 engines, ensuring exact compatibility with the original exhaust system. Core function is to monitor exhaust oxygen content and feed back to the ECU to optimize air-fuel ratio, reducing emissions and preventing engine fault lights from too rich or too lean mixtures. OEM number 0065422118 (also 65422118) can be cross-checked with Mercedes original parts to avoid mis-purchase. Replacement difficulty is medium; lift the vehicle and disconnect the harness; use a dedicated oxygen sensor socket to avoid thread damage; after installation, clear fault codes with a diagnostic tool and reset learning values. For B2B buyers, this sensor is compatible with multiple platforms (e.g., Mercedes CLS, R-Class); high turnover and our own brand authorization can reduce procurement costs, suitable for bulk stocking.