1. The drivers door sensor on a Fiat Scudo is located on the side of the door near the door handle.
2. The sensor is usually covered by a rubber grommet.
3. Pull the rubber grommet out and disconnect the electrical connector behind the sensor.
4. Unscrew the sensor from the door and replace it with a new one.
5. Reattach the electrical connector and snap the grommet into place.