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

WARNING: This page is about a different car, the 2014 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

WARNING:

A hot engine and exhaust system can cause severe burns. Turn off the engine and wait until they are cool before removing the exhaust system.

CAUTION:

Do not allow flammable objects such as the taping for bundling a wiring harness to come into contact with the exhaust manifold and silencer.

Fig 1: Identifying A/F Sensor Components

Courtesy of MAZDA MOTORS CORP.

Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
Remove the plug hole plate. (See PLUG HOLE PLATE REMOVAL/INSTALLATION .)
Disconnect the A/F sensor connector.
Remove the clip from the heat insulator.

Fig 2: Identifying Heat Insulator And Clip
Courtesy of MAZDA MOTORS CORP.
Remove the wiring harness from the wire clip A and B. (See ASSEMBLY OF WIRING HARNESS TO WIRE CLIP NOTE .)

Fig 3: Removing Wiring Harness From Wire
Courtesy of MAZDA MOTORS CORP.
Remove the A/F sensor using the SST .
Install in the reverse order of removal.

Fig 4: A/F Sensor And SST With Torque Specifications
Courtesy of MAZDA MOTORS CORP.