How do you fix a timing belt on a 1991 Nissan Stanza?

To fix the timing belt on a 1991 Nissan Stanza, first ensure the engine is cool and disconnect the battery. Remove any necessary components, such as the engine covers, to access the timing belt. Align the timing marks on the crankshaft and camshaft to the correct positions, then remove the old belt and replace it with a new one, ensuring the tension is correctly adjusted. Finally, reassemble all removed parts and reconnect the battery before starting the engine to check for proper operation.