3rd Gen Engine and Drivetrain -> 2003-2007 5.9 liter Engine and drivetrain discussion only. PLEASE, NO HIGH PERFORMANCE DISCUSSION!

How many miles before alternator goes bad.

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Old Feb 18, 2010 | 12:42 PM
  #1  
supersport's Avatar
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How many miles before alternator goes bad.

Please tell me how many miles you got out of an OEM alternator ??

Thanks.
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Old Feb 18, 2010 | 01:47 PM
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From: livermore,ca
164,000 so far and still going strong.....
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Old Feb 18, 2010 | 02:26 PM
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From: Midlothian, TX
152K and no hickups... knock on wood.
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Old Feb 18, 2010 | 07:34 PM
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From: McKinney, TX
Im sure somebody has had a failure, but I sure don't recall reading about it here. Im curious too.

..
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Old Feb 19, 2010 | 08:51 AM
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From: Castle Rock, CO
Mine is a 2nd gen so not sure if the same alternator but 250k and still going.
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Old Feb 19, 2010 | 09:13 AM
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I replaced mine at 65K-not because it was necessarily going bad, but both my batteries were leaking acid out into the trays (yikes!) and I figured I may as well replace the alternator and the serp belt at the same time.
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Old Feb 19, 2010 | 12:48 PM
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From: Bryan,Tx
"How many miles(Licks) before alternator goes bad..." 1....2...CRUNCH! 3!
Like most things... it's a Crap Shoot. Mines at 215,000+ and still going strong... Guess I should go to Vegas!
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Old Feb 19, 2010 | 12:52 PM
  #8  
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From: misplaced Idahoan stuck in Albuquerque, Roughneckin on RIG 270
my brother has 500,000 on his 91 and still stock alternator
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Old Feb 19, 2010 | 01:38 PM
  #9  
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From: Beaverton, Oregon
I've got 115k on the original altenator and batteries, now as far the tranny and injectors thats another story.
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Old Feb 19, 2010 | 07:33 PM
  #10  
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From: big spring tx.
My 01 went at 165k,185 on stock one on 05.
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