Refine Brilliance Oxygen Sensor SMW250120 Replaces 25324175 1026605GAA

Oxygen sensor for various brands including Ruifeng and Zhonghua; OEM number SMW250120 replaces original 25324175 and 1026605GAA. Installed on the exhaust manifold or pipe, monitors exhaust oxygen content in real time and feeds signal to ECU to adjust air-fuel ratio for efficient combustion. Installation difficulty: medium; 0.5-1 hour recommended. If idle is unstable, fuel consumption rises, acceleration is weak, or the engine light is on, sensor signal drift indicates replacement is needed to maintain emission compliance.