Exhaust CMP Sensor

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.

Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
Remove the plug hole plate. (See PLUG HOLE PLATE REMOVAL/INSTALLATION .)
Disconnect the exhaust CMP sensor connector.
Remove the exhaust CMP sensor.
Install in the reverse order of removal.

Fig 1: Exhaust CMP Sensor And Mounting Bolt With Torque Specifications
Courtesy of MAZDA MOTORS CORP.