Heated Oxygen Sensor (Ho2S) Removal/Installation: 2WD

Courtesy of MAZDA MOTORS CORP.

1. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
2. Lift up the vehicle.
3. Remove the following parts:
   1. Plate (See EXHAUST SYSTEM REMOVAL/INSTALLATION .)
   2. Floor under cover (See FLOOR UNDER COVER REMOVAL/INSTALLATION .)
   3. Brace bar (See EXHAUST SYSTEM REMOVAL/INSTALLATION .)
4. Disconnect the HO2S connector.
   Fig 1: Heated Oxygen Sensor, Connector, Clip And Nut With Torque Specification (2WD)

   Courtesy of MAZDA MOTORS CORP.
5. Remove the clip B from the body.
6. Remove the nut.
7. Remove the clip A from the bracket.
8. Remove the HO2S using the SST.
   Fig 2: Heated Oxygen Sensor With Torque Specification (2WD)

   Courtesy of MAZDA MOTORS CORP.
9. Install in the reverse order of removal.