In principle, any AC electrical generator can be called an alternator, but usually, the term refers to small rotating machines driven by automotive and other internal combustion engines. An alternator that …

Mar 4, 2025 · Learn how your car's alternator powers electrical components and charges the battery. Discover how it works, signs of a bad alternator, and when to get service.

Find an alternator that fits your car and delivers the same performance as original equipment, or better. We carry long lasting replacements, like Duralast Gold alternators that come with a Limited-Lifetime …

Aug 5, 2025 · Learn what an alternator is, how it works, and its key components. A beginner-friendly guide to understanding alternators in automotive and industrial applications.

Nov 18, 2025 · alternator, Source of direct electric current in modern vehicles for ignition, lights, fans, and other uses. The electric power is generated by an alternator mechanically coupled to the engine, …

How do Alternators Work? Your vehicle’s alternator is part of its starting and charging system. Its primary job is to maintain the charge of your car battery. Alternators produce AC power through …

6 days ago · The alternator in my daily driver 2003 BMW 530i just died. Before I delve into the nuts and bolts of the replacement, it’ll be useful to give you the context on alternators in daily driven modern …

The alternator uses mechanical energy from a drive belt or serpentine belt connected to the engine's crankshaft pulley and converts it into electricity. Alternators power the vehicle's electrical system and …

Feb 24, 2025 · Here's how to tell if your car needs a new alternator and how to install one yourself. If your car or truck won't hold a charge, you probably need a new alternator. Learn how to test it and …

Get an estimate today and take your vehicle to your local NAPA Auto Care center for alternator repair or replacement service by an ASE-certified technician.