DISASSEMBLY

    1.Using the heated oxygen sensor wrench [SST: KV10114400 (J-38365)] (A), remove heated oxygen sensor 2 (1).
    NNBIA0174ZZ.JPG
    ■ 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).
    NNBIA0175ZZ.JPG
    ■ 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.

    NNBIA0206ZZ.JPG

    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.