How do you change the camshaft sensor on vauxhall astra coupe?

To change the camshaft sensor on a Vauxhall Astra Coupe, first, ensure the engine is off and cool. Disconnect the negative battery terminal, then locate the camshaft sensor, which is typically found near the engine's cylinder head. Unplug the electrical connector and remove the retaining bolt to take out the old sensor. Install the new sensor by reversing the process, ensuring it's secured and the connector is properly attached before reconnecting the battery.