Order Hyundai Sonata O2 Sensors. Get Hyundai Sonata O2 Sensor Socket & Spacer. Check Oxygen Sensor Replacement Cost. Find Sensor Location. Use Sensor Cleaner. Maintaining optimal performance in your Hyundai Sonata hinges on the health of your O2 sensors, essential for managing your engine's air-fuel mixture. To extend their lifespan, avoid contaminants like silicone or oil and ensure your vehicle is running on quality fuel. Signs that replacement is due include a persistent check engine light and a dip in fuel economy. When selecting a new O2 sensor, opt for either a zirconia or a titania type, each known for durability and precise measurement. High-grade materials and proper installation are pivotal, so choose sensors that promise OEM-quality fitment and longevity, ensuring your Sonata continues to run smoothly and efficiently.