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Alternators
Spark Plugs and Wires
VW Jetta

How do you know when your alternator needs to be replaced?


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Wiki User
2015-07-15 18:56:48
2015-07-15 18:56:48

Hey Lakisha==Take it to Auto Zone and they can check it out for free. Goodluck Joe

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Check the voltage at the battery with engine running. It should read 13.5 to 15.5 volts. Any less and the alternator is suspect.

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Your car hesitates to turn on or it turns off on you while driving.

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Sometimes, but not always, the alternator will whine loudly when it's malfunctioning.

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alternator needs to be replaced. battery also might be a problem due to the alternator not charging it

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The alternator only needs to be replaced when it fails. Its not a part that needs to be changed during routine maintenance. If it ain't broke, don't fix it!


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