Buick Encore Oxygen Sensor 24104840 24104839 F01R00C047 Dual Numbers

When your Buick Encore experiences idle instability, obvious fuel consumption rise, engine fault light on, or acceleration sluggish, this typically indicates aging sensor failure that cannot accurately monitor exhaust oxygen content. The sensor normally feeds back oxygen concentration to the ECU to help precisely control the air-fuel ratio, ensuring efficient combustion and reduced emissions. This product fits Buick Encore, OEM number 24104840 (also compatible with 24104839 and F01R00C047). Ensure the original part number is checked. During installation, operate with a cold engine to avoid damaging threads; use a dedicated socket to tighten to the specified torque to prevent leaks and false alarms.