Shop BMW X3 O2 sensor socket & spacer. Find BMW X3 oxygen sensor replacement cost. Explore BMW X3 oxygen sensor location. Order BMW X3 sensor cleaner. Maintaining your BMW X3's O2 sensors is crucial for optimal performance and fuel efficiency. Regularly check for signs of wear, such as rough idling or a check engine light, indicating it's time to replace them. To extend their lifespan, avoid using fuel additives and ensure your vehicle is serviced regularly. When selecting new O2 sensors, opt for direct-fit options that match your X3 model for a seamless installation. Choose high-quality sensors with responsive zirconium or titanium dioxide elements for accurate readings, ensuring your BMW runs smoothly and maintains its resale value. Always follow manufacturer guidelines for fitting to avoid damage and ensure functionality.