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

WARNING: This page is about a different car, the 2017 Mazda CX-9. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Heated Oxygen Sensor, Connector, Brace Bar, Plate, Clip A And B (2WD)

Courtesy of MAZDA MOTORS CORP.

Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
Lift up the vehicle.
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 .)
Disconnect the HO2S connector.

Fig 2: HO2S, Connector, Bracket, Clips And Nut With Torque Specification
Courtesy of MAZDA MOTORS CORP.
Remove the nut.
Remove the clip A from the bracket.
Remove the clip B from the body.
Remove the HO2S using the SST.

Fig 3: Removing HO2S Using SST
Courtesy of MAZDA MOTORS CORP.
Install in the reverse order of removal.