Subaru WRX STI Alternator

The alternator on a Subaru WRX STI is responsible for recharging the battery as well as powering electrical systems inside your car. It uses the principles of electromagnetism to convert the engine's rotation into electrical energy. If the alternator isn't working as it should, you could be left stranded. The repair is usually straightforward, and new Subaru WRX STI alternators are available at AutoZone from popular brands like Duralast Gold and Bosch.

In general, an alternator can be expected to last in the vicinity of seven years or so before it needs to be changed. When the alternator stops working normally, symptoms will show up such as slow engine cranking, flickering lights, a dead battery, smoke from under the hood, squealing or whining noises, or a check engine light related to low voltage. If you have one of these symptoms, you might require a new alternator for your car.