8th Gen Sonata Rear Oxygen Sensor 39210-2E400, effectively reduces harmful exhaust emissions, making driving more environmentally friendly.

8th-generation Hyundai Sonata rear oxygen sensor (OEM 39210-2E400) directly replaces the original, high compatibility. Core function is to monitor exhaust oxygen content and feed back to ECU to precisely control air-fuel ratio, effectively reducing harmful exhaust and improving environmental performance. Installation resolves high fuel consumption, engine vibration, or tailpipe emissions issues; especially suitable before annual inspection. If the dashboard check engine light is on or you feel acceleration is weak or fuel consumption rises, aging sensor is likely; replacement is advised.