Air Fuel Ratio Sensor: Removal

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.

DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL (See REMOVAL )
REMOVE ENGINE AND TRANSMISSION
1. Remove the engine and transmission (See REMOVAL ).
REMOVE AIR FUEL RATIO SENSOR (for Bank 1 Sensor 1)
1. Disconnect the air fuel ratio sensor connector.
2. Using SST, remove the air fuel ratio sensor from the exhaust manifold LH.
  SST 09224-00010
  
  Fig 1: Locating Air Fuel Ratio Sensor Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REMOVE AIR FUEL RATIO SENSOR (for Bank 2 Sensor 1)
1. Disconnect the air fuel ratio sensor connector.
2. Using SST, remove the air fuel ratio sensor from the exhaust manifold RH
  SST 09224-00010
  
  Fig 2: Removing Air Fuel Ratio Sensor From Exhaust Manifold RH
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002