[Bank 1/Sensor 2]

Turn the ignition switch OFF and disconnect the battery negative (-) cable.
Disconnect the connector (A), and then remove the sensor (B).
Heated Oxygen Sensor :

39.2 - 49.1 N.m (4.0 - 5.0 kgf.m, 28.9 - 36.2 lb.ft)

Fig 1: Locating HO2S Sensor Connector (Bank 1/Sensor 2)

Courtesy of KIA MOTORS AMERICA, INC.

Fig 2: Locating HO2S Sensor (Bank 1/Sensor 2)

Courtesy of KIA MOTORS AMERICA, INC.