Alternator compatible for Toyota Hilux D4D Hiace KDH200 KUN16R KUN26R KZN156 2.5L 3.0LDescription 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