How do you change a headlight Jaguar XJ 2003?

To change the headlight on a 2003 Jaguar XJ, first, open the hood and locate the headlight assembly. Disconnect the wiring harness from the back of the bulb, then twist the bulb socket counterclockwise to remove it. Replace the old bulb with a new one, ensuring not to touch the glass with your fingers, and reassemble by reversing the steps. Finally, test the new headlight before closing the hood.