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What could cause alternators to keep going out?

Tiny
RON_COX
  • MEMBER
  • 1997 LEXUS ES 300
  • 180,000 MILES
I replaced the alternator 2 years ago with a Duralast rebuilt from AutoZone. It has a lifetime warranty. Three weeks ago it went out, I replaced it and it worked fine. 6 days later it quit working. I replaced it again. AutoZone said they had been having issues with these alternators. 2 weeks later it went out again. I have a new battery and all the connections are clean and test good. I just want to make sure that I am not missing something.
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Friday, August 31st, 2012 AT 4:47 AM

1 Reply

Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Sounds like the problem is with the alternators your getting from auto zone if they say there having issues with them and they keep going out. I would replace the battery at the same time as the alternator because when the battery goes out it overloads the alternator.

Here are two guides to help walk you through the repair on a similar car

https://www.2carpros.com/articles/how-to-replace-an-alternator

and

https://www.2carpros.com/articles/how-to-replace-a-car-battery

Please run down these guides and report back.
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Friday, August 31st, 2012 AT 4:55 AM

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