Explore Ford Mustang Oxygen Sensor Replacement Cost & Ford Mustang Sensor Cleaner Locate Ford Mustang O2 Sensor Socket. Find Ford Mustang Oxygen Sensor Location. Maintaining the O2 sensors in your Ford Mustang is crucial for optimal performance and fuel efficiency. To extend their lifespan, avoid using leaded fuels and ensure your engine is running properly to prevent contamination. Signs that your sensors may need replacing include a persistent check engine light and poor mileage. When selecting a replacement, opt for high-quality sensors that match your Mustang's specifications, whether it's a heated or unheated type, as they directly affect fuel-to-air ratio calculations. For installation, follow the manufacturer's guidelines to ensure proper function and remember to handle the sensor delicately to avoid damage.