You will need a key «on 10».
1. Place the vehicle on a pit or lift.
2. Disconnect the wire from the terminal «–» battery.
3. Disconnect the wiring harness connector from the oil pressure sensor.
4. Turn out a bolt of fastening of the gauge to the block of cylinders …
5.... and remove the sensor from the hole in the block.
6. Install the sensor in the reverse order of removal.