别克昂科拉 前氧传感器 55563348 原厂标准

Does your Buick Encore (2012-2019) experience MIL, obviously increased fuel consumption, rough idle, or weak acceleration? These symptoms usually indicate downstream oxygen sensor aging or failure causing air-fuel ratio imbalance. This sensor monitors oxygen content in exhaust and feeds ECU to accurately control injection; OEM number 55563348; fits Buick Encore (2012-2019) and other common models. Installation in cold vehicle; use dedicated socket for careful removal to avoid thread damage; ensure sensor harness away from exhaust.