Infiniti Oxygen Sensor A0075426418 / 0258030009-010 Precise Air-Fuel Ratio Monitoring

When Infiniti vehicles exhibit idle instability, noticeably higher fuel consumption, weak acceleration, or a persistent engine fault light, the oxygen sensor aging or failure is likely causing a lean/rich condition. The sensor, when functioning properly, monitors oxygen content in the exhaust in real time and feeds back to the ECU to precisely adjust injector quantity, ensuring the engine runs at the optimal air-fuel ratio, improving fuel economy and emission cleanliness. This product OEM number A0075426418, suitable for Infiniti Q50, Q70, QX60 and other VQ-series engine-equipped models. Installation must use a dedicated socket to avoid breaking threads, and ensure the sensor harness does not contact the exhaust or chassis components to prevent heat damage.