奔驰氧传感器0065421718 0281004201/4203 性能升级选

On Mercedes-Benz C-Class, E-Class, S-Class engines near catalytic converter, the oxygen sensor (OEM 0065421718, compatible 0281004201/4203) monitors exhaust oxygen content in real time and feeds ECU to precisely control air–fuel ratio, ensuring combustion efficiency and emissions compliance. Upgraded performance sensor; installation difficulty medium; 0.5-1 hour; ensure threads are clean and torque is controlled. Increased fuel consumption, weak acceleration, or sharp odor from exhaust may relate to this sensor.