Precision Oxygen Sensor 3921003BD1 for Hyundai & KIA

Direct-fit replacement for OEM 39210-03BD1 with exact OE specifications. High-grade zirconia ceramic sensing element ensures accurate air-fuel ratio readings. Nickel-plated terminals resist corrosion for reliable electrical connectivity.

Optimizes engine performance by monitoring exhaust gases in real time. Reduces emissions and improves fuel efficiency up to 15%. Sealed waterproof connector prevents moisture damage.

Compatible with Hyundai Santa Fe/KIA Sorento models (2014-2018). Includes anti-seize compound for easy installation. Batch-tested under extreme temperatures (-40°C to 900°C).

Bulk order discounts available for auto repair shops. Ships globally from bonded warehouses with 30-day return policy.