How do you change the starter motor on a astra mk 4 1.6?

To change the starter motor on a Vauxhall Astra Mk 4 1.6, first disconnect the negative battery terminal to ensure safety. Remove any components obstructing access to the starter, such as the air intake or battery tray. Unbolt the starter motor from its mounting, disconnect the wiring harness, and remove the old starter. Install the new starter by reversing the process, ensuring all connections are secure before reconnecting the battery.