宝马氧传感器 11787570760 0258017137，直接替换旧件省心省力

When your BMW experiences idle instability, obvious rise in fuel consumption, exhaust odor, or the engine warning light frequently on, this is usually due to aging or failure of the oxygen sensor. The sensor monitors exhaust oxygen content in real time and feeds back to the ECU to precisely control air-fuel ratio, ensuring efficient combustion and emissions compliance. This product uses original OEM number 11787570760 (Bosch 0258017137) and fits many BMW models with N46, N52, N55 engines (3 Series, 5 Series, X3, X5). Installation must be performed with the engine cold; carefully remove the old part with a dedicated socket, avoid thread or connector damage, and ensure the new sensor is tightened to 45-55 N·m.