斯巴鲁 前氧传感器 22641-AA54A 空燃比检测 原厂品质替代

When your Subaru exhibits rough idle, acceleration weakness, high fuel consumption, or the check engine light (codes like P0171/P0172) on the dash, the front O2 sensor may be aging or failed. This sensor monitors oxygen content in the exhaust and feeds signals to the ECU to precisely control fuel injection, ensuring optimal air-fuel ratio and engine power. This product OEM number is 22641-AA54A, compatible with Subaru Forester, Outback, Legacy, and other models, also compatible with 22641-AA540, 2349097, 234-9097 replacement numbers. Use a dedicated oxygen sensor socket during installation to avoid damaging threads; apply a small amount of anti-sieze compound on the threads before installation but do not contaminate the sensor tip.