- Compatible Models: This Air Fuel Ratio Sensor is designed to fit a variety of vehicles, including the 2003-2006 Baja, 2003-2004 Forester, and 2003-2004 Impreza. - Vehicle Fit: The upstream Heated O2 Oxygen Sensor is compatible with Legacy models from 2003-2004 and Outback models from 2003-2004, ensuring a perfect match for your engine needs. - Quality Assurance: Manufactured under strict scientific standards, these Oxygen Sensors undergo 100% factory testing. They are built to be durable, oxidation-resistant, and capable of withstanding high temperatures, promoting long-term stability and optimal engine performance. - Easy Installation: The Oxygen Sensors are designed for direct replacement, fitting seamlessly into the original installation position. They come with pre-coated threads, making installation straightforward and hassle-free. - Performance Benefits: By ensuring accurate air-fuel mixture readings, these sensors enhance engine efficiency, improve fuel economy, and help maintain smooth operation, reducing the risk of engine misfires and emissions issues. - Practical Applications: Ideal for routine vehicle maintenance, these sensors help keep your engine running smoothly. Whether you're replacing a faulty sensor or upgrading for better performance, these sensors deliver reliability and efficiency. - Durable Construction: Built to withstand extreme conditions, these sensors provide consistent performance across various driving environments, making them a smart choice for drivers who demand quality and reliability.