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If it's for a Ford, you do not want a used unit and you don't want a rebuilt either. Ford has a final diode inside the alternator that acts like a gate for the current. A bad diode will leave you with a dead battery even though the alternator will show good in tests as it allows the current to run back thru the unit when the engine is not running. Rebuilders do not check for this and neither do the test units at parts houses. All they test for is output. Buy new or expect issues.....if it's a Ford product.
It would help to know what kind of vehicle, but in general alternators is not something you should buy used. I would go with a reman at the very least, but then you are talking a very small price difference between reman and new in the case of most alternators. Overall, depening on the application and how much longer you plan on keeping the vehicle, I would probably recommend buying new.
True,
In some cases a new Alt can be cheaper than a reman.
Quote:
Originally Posted by StealthRabbit
Often the price difference is minimal (depending on application)
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