Hyundai Grandeur 2011 Oxygen Sensor 39210-3CDB0 Front and Rear Compatible Stable Performance

Oxygen sensor direct replacement for OEM 39210-3CDB0, universal for front and rear positions; monitors exhaust oxygen content and feeds ECU to adjust air-fuel ratio for engine efficiency. Fits 2011 Hyundai Grandeur (Azera) 2.4L and 3.0L. After installing, solve high fuel consumption or acceleration issues and ensure emissions compliance. If check engine light on or idle unstable or exhaust emits black smoke, likely aging—replace early to save fuel and peace of mind.