Shop Toyota RAV4 O2 Sensor Socket & Spacer. Explore Toyota RAV4 Oxygen Sensor Replacement Cost. Discover Toyota RAV4 Oxygen Sensor Location. Maintaining the oxygen (O2) sensors in your Toyota RAV4 is crucial for optimal performance and fuel efficiency. Regularly inspect sensors for soot buildup and ensure proper electrical connections to prolong their lifespan. Signs such as rough idling, decreased fuel economy, and a lit check engine light often signal the need for replacement. When selecting a new O2 sensor, opt for options that match your RAV4's specifications—broadband or narrowband, heated or unheated—each designed to deliver accurate air-fuel ratio readings. High-quality materials and following the correct installation procedure will ensure the longevity and reliability of your new sensor, enhancing your vehicle's health and ensuring a seamless shopping experience.