Find Toyota Yaris O2 Sensor Socket & Spacer. Explore Toyota Yaris Oxygen Sensor Replacement Cost. Discover Toyota Yaris Oxygen Sensor Location. Ensuring your Toyota Yaris runs smoothly hinges on the health of your O2 sensors, vital for optimizing fuel efficiency and emissions. Regularly check for signs of wear, such as poor fuel economy or a check engine light, signaling it's time to replace these key components. Extend their lifespan by maintaining a clean engine and using high-quality fuel. When choosing a replacement, opt for either narrow-band or wide-band sensors, each designed for precise feedback on air-fuel ratios. Select the one that matches your model's specifications, and consider sensors crafted with durability to withstand extreme temperatures, ensuring a wise investment for your vehicle's longevity. Installation is straightforward, but always adhere to torque specifications to avoid damage.