雷诺/欧宝/沃克斯豪尔氧传感器 7700274189 8200036545 直接替换，消除故障码

This oxygen sensor directly replaces OEM numbers 7700274189, 8200036545 and is compatible with 7700107561 and 820005206; highly versatile. It monitors oxygen content in exhaust and sends signals to the ECU to adjust the air-fuel ratio, ensuring combustion efficiency. Fits Renault, Opel/Vauxhall across many petrol models, such as Megane, Astra. After installation, it eliminates the engine fault light and restores power response; fuel economy improves. If idle instability, acceleration hesitation, or strong fuel odor from exhaust occur, the oxygen sensor is aging and should be replaced.