How do you change an alternator on a Renault scenic dci?

To change the alternator on a Renault Scenic dCi, first disconnect the negative battery terminal to ensure safety. Remove any components obstructing access to the alternator, such as the engine cover or air intake. Then, disconnect the electrical connections and the drive belt from the alternator. Finally, unbolt the alternator from its mounting and replace it with the new unit, reassemble all components, and reconnect the battery.