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 …

The team at O’Reilly Auto Parts can help you select the correct alternator, walk you through how to replace a car alternator, and make sure you have the right tools for the job.

What is an Alternator? Put most simply, it charges your battery. It does this by converting mechanical energy from the rotation of the engine's crankshaft into electrical energy while the engine is running. …

Sep 10, 2025 · It’s essentially a small generator that converts mechanical energy into electricity, bolted to the engine and driven by a belt connected to the engine’s crankshaft. Inside, a rotor spins past...

Mar 4, 2025 · It supplies electricity to the battery and electrical system to keep your car alive when the engine is running. As you drive around or idle, the alternator powers key components like headlights, …

Online shopping for Alternators - Alternators & Generators from a great selection at Automotive Store.

Alternator is an important component in your vehicle's electrical system, ensuring that your battery remains charged and your electrical devices function smoothly. It takes the mechanical energy …

Your alternator is a vital part of your vehicle's electrical system. Mounted onto a car or truck’s engine, it converts your vehicle's mechanical energy into electrical energy.

Feb 4, 2026 · 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, with …

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