Air Fuel Ration Sensor (3MZ-FE (LH Bank)): Replacement

WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.

DISCONNECT ENGINE WIRE NO. 3 (BATTERY NEGATIVE TERMINAL)
REMOVE AIR FUEL RATIO SENSOR
1. Disconnect the air fuel ratio sensor connector.
2. Remove the wire harness clamp.
  
  Fig 1: Disconnecting Air Fuel Ratio Sensor Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Using SST, remove the air fuel ratio sensor.
  SST 09224-00010
  
  Fig 2: Using SST, Removing Air Fuel Ratio Sensor
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSTALL AIR FUEL RATION SENSOR
1. Using SST, install the air fuel ratio sensor. SST 09224-00010
  Torque: 44 N.m (449 kgf.cm, 32 ft.lbf)
  
  Fig 3: Using SST, Installing Air Fuel Ratio Sensor
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Install the wire harness clamp.
3. Connect the air fuel ratio sensor connector.
DISCONNECT ENGINE WIRE NO. 3 (BATTERY NEGATIVE TERMINAL)
Torque: 5.4 N.m (55 kgf.cm, 48 in.lbf)
CHECK FOR EXHAUST GAS LEAKS
SYSTEM INITIALIZATION (See PRECAUTION )