Hyundai Sonata Oxygen Sensor 39210-37520 Precise Air-Fuel Ratio Control

Hyundai Sonata oxygen sensor (OEM 39210-37520) uses high-temperature ceramic element and corrosion-resistant stainless steel housing; durable under exhaust high temps and vibration. Directly fits Sonata models; before installation verify original connector and harness length. Function: real-time monitoring of air-fuel ratio and sending signal to ECU to optimize fuel injection; for combustion efficiency and emissions compliance. When removing near exhaust manifold, use a dedicated sleeve to avoid thread damage.