How do you change defrost sensor on a fiat marea?

To change the defrost sensor on a Fiat Marea, first, disconnect the vehicle's battery to ensure safety. Remove the dashboard trim around the climate control area to access the sensor, typically located near the windshield. Disconnect the wiring harness from the old sensor, remove it, and install the new sensor by reversing the steps. Reassemble the dashboard trim and reconnect the battery to complete the replacement.