120A Alternator compatible for Toyota Landcruiser HZJ80 HZJ105 HZJ75 78 79 1HZ 4.2L DieselDescription In modern cars, alternators are used to charge batteries and power electrical systems while the engine is running. With the exception of certain hybrid vehicles, all vehicles with internal combustion engines are equipped with alternators. When the engine is running, the alternator charges the battery and provides additional power to the vehicle's electrical system. The alternator is bolted to the engine and is driven by a serpentine belt