Manufacturers rarely consider alternators to be wear parts, but these critical components tend to fail long before the rest of the car. In some cases, alternators can even fail with well under 100,000 miles on the odometer. While these parts typically aren't too expensive, you probably don't want to get into the habit of replacing them more often than necessary.
If you need a new alternator, there are a few decisions you'll need to make that can impact the longevity of your replacement part.
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