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

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, Clip, Connector, Wire Clip A And B

Courtesy of MAZDA MOTORS CORP.

1. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
2. Remove the plug hole plate. (See PLUG HOLE PLATE REMOVAL/INSTALLATION .)
3. Disconnect the A/F sensor connector.
4. Remove the clip from the heat insulator.
   Fig 2: Identifying Heat Insulator And Clip

   Courtesy of MAZDA MOTORS CORP.
5. 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 Clip A And B

   Courtesy of MAZDA MOTORS CORP.
6. Remove the A/F sensor using the SST. 
   Fig 4: Removing A/F Sensor Using SST

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