There are quite a few essential components in your engine that are powered by your battery. Without some way to provide a continual charge, your car battery would drain fast and you would be stuck with a dead car. The job of the BMW 540i alternator is just that: to provide a charge to your battery so your engine can keep on running.

Your 540i alternator is a rotating assembly with bearings and shafts that keeps your battery going. The many engine components and accessories that rely on battery power can be quite a drain on your BMW 540i alternator.

Of course, your starter relies on your battery, and therefore your 540i alternator, to provide the kick that turns your engine over to start your car. In addition to the starter, your BMW 540i alternator provides power for your power windows, power door locks, air conditioner, heated seats, windshield washer, and all the electric motors in your car. This means your 540i alternator is going to wear down over time. When your BMW 540i alternator starts to fail, you may notice a general slowdown in many of your car's electrical components. Your headlights and dash lights will dim, your signal lights will flash slower and slower, your power windows will be sluggish, and your engine may take longer to turn over. All of these signs point to a fading 540i alternator, because it is no longer able to charge your battery to full capacity. It is important to replace a failing BMW 540i alternator right away, because if it goes completely you will be stranded somewhere with no chance of starting your car until your 540i alternator is repaired. Even if you jump your battery, without a working BMW 540i alternator it won't hold a charge.Order a replacement 540i alternator from our online catalogue and we'll ship it right to your door.