Front Heated Oxygen Sensor (Ho2S) Removal/Installation

For the AT vehicles, perform the following procedure for easier access.
1. Remove the rubber hanger.
2. Remove the rear tunnel member.
3. Remove the front tunnel member.
4. Remove the catalytic converter installation nuts.
5. Remove the ATF level gauge pipe. (See AUTOMATIC TRANSMISSION REMOVAL/INSTALLATION .)
Fig 1: Exploded View Of Exhaust With Torque Specifications
Courtesy of MAZDA MOTORS CORP.
Remove the front HO2S using the SST (49 T018 001).
Install in the reverse order of removal.
Front HO2S tightening torque
1. 29-49 N.m {3.0-4.9 kgf.m, 22-36 ft.lbf}
Fig 2: Removing Front HO2S
Courtesy of MAZDA MOTORS CORP.