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Do you have to replace the battery when replacing the alternator?
I’m no mechanic, but I do know that the alternator and battery are related parts. That got me thinking—do you have to get the battery replaced when replacing the alternator?
Natalie Todoroff · Updated on
Reviewed by Shannon Martin, Licensed Insurance Agent.
While you have to disconnect the battery from the engine, you do not have to replace the battery when replacing the alternator. Alternators typically have a lifespan between seven and ten years, while batteries last between three and four. So, if the dates line up, you can replace your battery along with your alternator, but it is not necessary to do so.
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