Air Fuel Ratio Sensor: Removal

REMOVE NO. 1 EXHAUST MANIFOLD HEAT INSULATOR
1. Remove the 4 bolts and remove the No. 1 exhaust manifold heat insulator.
  
  Fig 1: Locating Exhaust Manifold Heat Insulator Bolts
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REMOVE AIR FUEL RATIO SENSOR
1. Disconnect the air fuel ratio sensor connector.
  
  Fig 2: Locating Air Fuel Ratio Sensor Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Using SST, remove the air fuel ratio sensor.
  SST 09224-00010
  
  Fig 3: Identifying Air Fuel Ratio Sensor
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002