Turning off the ignition..
... disconnect the sensor connector.
ring wrench «at 13» unscrew the bolt securing the sensor to the cylinder block..
... and remove the sensor.
In photo 1-3, the exhaust pipe and the air filter housing are removed for clarity.
Before installing the sensor, clean the surface of its fit on the cylinder block.
Install the sensor in reverse order. The moment of an inhaling of a bolt of fastening of the gauge 20–25 Н·м.