Heated Oxygen Sensor (Ho2S) And Catalyst Monitor Sensor - 2.3L Removal/Installation

Fig 1: Heated Oxygen Sensor (HO2S) And Catalyst Monitor Sensor Replacement Components - 2.3L With Torque Specifications

Courtesy of MAZDA MOTORS CORP.

ITEM DESCRIPTION CHART

1	Heated oxygen sensor (HO2S) and catalyst monitor sensor electrical connectors
2	HO2S sensor
3	Catalyst monitor sensor

1. With the vehicle in NEUTRAL, position it on a hoist. See LIFTING .
2. Disconnect the heated oxygen sensor (HO2S) and the catalyst monitor sensor electrical connectors.
   Fig 2: Identifying Special Tool (303-476)

   Courtesy of MAZDA MOTORS CORP.
3. Using the special tool, remove the HO2S and catalyst monitor sensor.
   • To install, tighten to 48 N.m {4.9 kgf.m, 35 ft.lbf}.
   NOTE: If necessary, lubricate the sensor threads with penetrating and lock lubricant to assist in removal.
4. To install, reverse the removal procedure.

NOTE: Apply a light coat of anti-seize lubricant to the threads of the heated oxygen sensor (HO2S) and the catalyst monitor sensor.