Ford Oxygen Sensor FR3A-9Y460-DA 234-5173 OEM Replacement

For Ford Focus, Escape, Mondeo and other models: when experiencing high fuel consumption, weak acceleration, or emission light on, you can replace oxygen sensor with part number FR3A-9Y460-DA, which is also compatible with 234-5173 and FR3Z-9F472-A. This sensor monitors exhaust oxygen content and feeds back to ECU to adjust air-fuel ratio, ensuring efficient combustion. When the engine idles unstably, there is strong odor in exhaust, or fuel consumption suddenly rises, it usually indicates sensor aging; replacement restores power and fuel efficiency.