宝马氧传感器 11787577667 0258010030，氧传感快速响应减少排放

BMW oxygen sensor (original number 11787577667) also compatible with 0258010030; install-ready and highly versatile. Its core function is to monitor exhaust oxygen in real time and feed the ECU to adjust the air-fuel ratio, reducing emissions and improving combustion efficiency; fits many N-series engine models (e.g., 3-Series, 5-Series, X3). Replacement resolves high fuel consumption, weak acceleration, and overly rich or lean mixture-induced vibration. If the check-engine light is on, exhaust emits black smoke, or fuel consumption spikes, the oxygen sensor failure is likely.