Removal & Installation

Raise and support the vehicle. Refer to LIFTING .
Disconnect the catalyst monitor sensor electrical connector.

Fig 1: Identifying Catalyst Monitor Sensor Electrical Connector (3.0L LH)
Courtesy of MAZDA MOTORS CORP.
NOTE:
- If necessary, lubricate the catalyst monitor sensor with Penetrating and Lock Lubricant to aid in removal.
Using the special tool, remove the catalyst monitor sensor.

Fig 2: Removing catalyst monitor sensor (3.0L LH)
Courtesy of MAZDA MOTORS CORP.
NOTE:
- Apply a light coat of High Temperature Nickel Anti-Seize Lubricant to the threads of the catalyst monitor sensor to aid in installation.
To install, reverse the removal procedure.