Air Fuel Ratio (A/F) Sensor Removal/Installation

1. Remove the battery cover. (See BATTERY REMOVAL/INSTALLATION [13B-MSP] .)
2. Disconnect the negative battery cable.
3. Remove the front suspension tower bar. (MT) (See FRONT SUSPENSION TOWER BAR REMOVAL/INSTALLATION [MT] )
4. Remove the bracket as shown in the figure.
5. Remove the extension manifold (upper.) (Refer to the INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [13B-MSP] in the appropriate Intake-Air System (13B-MSP) article )
6. Disconnect the A/F sensor connector.
7. Remove the catalytic converter installation nuts, then move the catalytic converter out of the way. (See EXHAUST SYSTEM REMOVAL/INSTALLATION )
Fig 1: Bracket Screws With Torque Specifications
Courtesy of MAZDA MOTORS CORP.
8. Remove the A/F sensor using the SST.
9. Install in the reverse order of removal.

Fig 2: A/F Sensor Screws With Torque Specifications

Courtesy of MAZDA MOTORS CORP.