BMW X1 535i Oxygen Sensor 11787557758 OEM specification, direct installation

BMW X1 535i oxygen sensor, OEM spec directly replaceable, OEM number 1178-7557-758, compatible with 0 258 017 101 / 0258017101. This sensor is installed before and after the exhaust catalytic converter, monitors oxygen content in exhaust in real time and feeds back to the ECU to precisely control the air-fuel ratio, ensuring optimal combustion. Installation difficulty is medium; estimated labor 0.5-1 hour. When removing and installing, avoid damaging threads and wiring harness. If the vehicle shows increased fuel consumption or reduced power, it is usually due to sensor aging.