Detach the cable from the negative terminal of the battery and remove the drivebelt. Disconnect the electrical connectors from the alternator and remove the alternator mounting bolts before taking the alternator out of the engine. If replacing the alternator, bring the old unit when purchasing a new or rebuilt one, ensuring it is identical in terms of terminal number, size, and location, as well as matching identification markings stamped in the housing or on a tag. Many new or rebuilt alternators may not come with a pulley, so you might need to transfer the pulley from the old unit; check the shop's policy on pulley installation, as some may offer this service for free. Reinstallation follows the reverse order of removal, and once the alternator is in place, reinstall the drivebelt. Finally, check the charging voltage to ensure the alternator operates correctly.