REAR WU-TWC (Bank 1)
- Remove the rear A/F sensor (Sensor 1) (see A/F SENSOR REPLACEMENT ) and rear secondary HO2S (Sensor 2) (see SECONDARY HO2S REPLACEMENT ).
- Remove exhaust pipe A (see EXHAUST PIPE AND MUFFLER REPLACEMENT ).
- Remove the driveshaft support base (see DRIVESHAFT SUPPORT BASE REPLACEMENT ).
- Remove the rear WU-TWC bracket, carefully remove the rear WU-TWC.
- Carefully install the rear WU-TWC with a new gasket and new self-locking nuts. Tighten the nuts in a crisscross pattern in two or three steps.
- Install the parts in the reverse order of removal.