How do you change the door mirror on a Vauxhall astra?

To change the door mirror on a Vauxhall Astra, first, ensure the car is turned off and disconnect the battery. Remove any plastic covers or screws securing the mirror, then gently pull the mirror away from the door. Disconnect the electrical connector, if applicable, and replace it with the new mirror by reversing the steps; secure it with screws and reconnect the battery. Finally, test the new mirror to ensure it functions properly.