Bank 1/Sensor 2

Turn the ignition switch OFF and disconnect the battery negative (-) cable.
Use the lift to lift up the vehicle.
Remove the engine room rear under cover.
(Refer to Engine Mechanical System - "ENGINE ROOM UNDER COVER ")
Remove the heated oxygen sensor connector (A).

Courtesy of HYUNDAI MOTOR AMERICA
Remove the heated oxygen sensor (A).
Tightening Torque:

35.3 - 45.1 N.m (3.6 - 4.6 kgf.m, 26.0 - 33.3 lb-ft)

Courtesy of HYUNDAI MOTOR AMERICA