DISASSEMBLY

1.Using the heated oxygen sensor wrench [SST: KV10114400 (J-38365)] (A), remove heated oxygen sensor 2 (1).
■ CAUTION ■
Heated oxygen sensor 2 is not reusable. Never remove it except when necessary.
NOTE：
Heated oxygen sensor 2 is removable under the car-mounted condition.

2.Using the heated oxygen sensor wrench [SST: KV10117100 (J-3647-A)] (A), remove air fuel ratio sensor 1 (1).
■ CAUTION ■
Air fuel ration sensor 1 is not reusable. Never remove it except when necessary.
NOTE：
Air fuel ration sensor 1 is removable under the car-mounted condition.

3.Remove bracket.

4.Remove three way catalyst.
■ CAUTION ■
Be careful not to damage three way catalyst.
NOTE：
Apply penetrating lubricant to nuts before operation.

5.Remove gaskets.
■ CAUTION ■
Cover engine openings to avoid entry of foreign materials.

ASSEMBLY
Note the following, and install in the reverse order of removal.
Air Fuel Ratio Sensor 1 and Heated Oxygen Sensor 2
■ CAUTION ■

- The shape of air fuel ratio sensor 1 depends on bank position. Refer to the figure to install.

  A | : Bank 1
  B | : Bank 2

- Before installing a new air fuel ration sensor 1 and heated oxygen sensor 2, clean exhaust system threads using heated oxygen sensor thread cleaner tool (commercial service tool: J-43897-18 or J-43897-12) and apply anti-seize lubricant.
- Set the tool in the hexagonal part to tighten new air fuel ration sensor 1 and heated oxygen sensor 2.
- Never over torque new air fuel ration sensor 1 and heated oxygen sensor 2. Doing so may cause damage to them, resulting in the “MIL” coming on.