Hyundai Elantra Su Mai Oxygen Sensor 39210-2B070, efficient sensor upgrade, noticeable power recovery.

When your Hyundai Elantra or Smae experiences check engine light, rough idle, weak acceleration, or noticeably increased fuel consumption, it is likely the oxygen sensor aged or failed, causing air-fuel imbalance. This sensor normally monitors exhaust oxygen content and sends signals to the ECU to precisely control injection, ensuring efficient combustion and smooth power output. OEM number 39210-2B070; fits Hyundai Elantra, Smae, and other multiple models. Note: perform installation after engine cools; disconnect battery negative before replacing; use a special sleeve to carefully unscrew the old sensor to avoid thread damage; applying a small amount of anti-seize compound on install is recommended, but avoid contact with the sensor tip.