The alternator is an important component, that charges the battery in your car. It is an electrical generator that converts mechanical energy to electrical energy in the form of alternating current. If you lose power in your headlights or your car takes a while to start, your alternator may be losing power, and can’t keep your battery charged. Ask your service advisor to inspect the condition of the charging system during every major service. By replacing your alternator now, you can avoid damaging the rest of the charging system. If the alternator is not working properly, even the best car battery will eventually run down. Failure to change your alternator will force your battery to work harder leading to premature failure and replacement. From a safety standpoint, there is a slight safety risk, because a failing alternator could leave you stranded on the side of the road. From an environmental point of view, there is low impact from a worn alternator.