Hyundai ix35 Sonata 2.0L Oxygen Sensor 39210-2E100 Environmental Upgrade Compatible with 39210-2B420

This replacement uses dual ceramic sheets and high-temperature alloy housing, more resistant to thermal shock and corrosion than the original, with tested life of 80,000–100,000 km. OEM number 39210-2E100, also compatible with 39210-2B420, 36531RL0G02, 0281004106, fits Hyundai ix35 and Sonata 2.0L models. Function is to monitor exhaust oxygen content and feed ECU to adjust air-fuel ratio, reducing fuel consumption and emissions. Replacement difficulty: medium; remove old sensor, tighten with a specialized sleeve, avoid cross-threading; typical install time ~30 minutes.