Ford Focus Front Oxygen Sensor 8F9A-9Y460-GA 0258017321 Direct Fit

Ford Focus upstream oxygen sensor 8F9A-9Y460-GA/0258017321 provides direct OEM replacement for Ford part 8F9A-9Y460; high compatibility for Focus and other models. Core function: monitor exhaust oxygen content and feed back to the ECU to adjust the air-fuel ratio, ensuring efficient combustion. Suitable for 2005-2012 Ford Focus 1.8L/2.0L gasoline variants; replacement resolves high fuel consumption, weak acceleration, and excessive exhaust emissions. If the engine check light is on, idle is unstable, or exhaust emits black smoke, sensor aging is likely; replace promptly.