CATALYST

Exploded View
Disassembly and Assembly

Exploded View

1.	Air fuel ratio sensor (bank 1)	2.	Three way catalyst (bank 1)	3.	Gasket
4.	Air fuel ratio sensor (bank 2)	5.	Gasket	6.	Three way catalyst (bank 2)
7.	Heated oxygen sensor (bank 2)	8.	Bracket	9.	Mounting rubber
10.	Collar	11.	Heated oxygen sensor (bank 1)
A.	To exhaust manifold and turbocharger assembly (bank 1)	B.	To exhaust manifold and turbocharger assembly (bank 2)	C.	To sub muffler
Refer to Components for symbols in the figure.

Disassembly and Assembly

DISASSEMBLY

■ 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.

■ 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.

■ CAUTION ■

Be careful not to damage three way catalyst.

NOTE：

Apply penetrating lubricant to nuts before operation.

■ 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.