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Old 04-16-2019, 12:19 PM #1
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Original alternator at 185k miles possible?
My alternator says “Toyota Denso” looks old .. wondering if it’s the original .. I have a v6 185k miles ... possible to have a original alternator this long?
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Old 04-16-2019, 12:41 PM #2
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Possibly. Not unheard of.

Mine crapped out just recently at 176k
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Old 04-16-2019, 12:43 PM #3
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I have an 04 v6 sr5 4wd and I’m still on the original alternator and starter at 282,000 miles. I did have to replace the original battery in 2013 at around 180000 miles. Hope that helps.
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Old 04-16-2019, 02:04 PM #4
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The DLX in my sig had 206k when I sold it with original alternator.
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(Previous truck: 1993 Toyota DLX, V6, 4x4, Xcab, 5 speed, Pewter Pearl - owned from day 1)
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Old 04-16-2019, 02:23 PM #5
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My starter and alternator have over 193,000 miles on them. I'm pretty impressed with the guy who posted above me with 282,000 miles. That's awesome.
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Old 04-16-2019, 02:36 PM #6
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Im pretty sure mine is the original (bought at 111k miles) and I have 152K miles on it.
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Old 04-16-2019, 03:31 PM #7
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The alternator on my V8 was replaced at 138K miles with another Denso unit.
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Old 04-16-2019, 03:42 PM #8
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The original alternator on my 07 crapped out last summer at 160k.
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Old 04-16-2019, 05:36 PM #9
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Just replaced mine at around 250,000. I assume it was the original.

Buy an OEM if you do, or rebuild yours. I went through 4 auto part store remanned ones before I got a good one.


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Old 04-16-2019, 05:52 PM #10
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One or both of the bearings went south at on mine at 140,000 miles, otherwise it was charging fine, and I'd probably still be running it until it failed.
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Old 04-16-2019, 09:06 PM #11
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replaced the original on mine at about 220,000 a few months ago. replaced it with a denso also
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Old 04-17-2019, 12:03 AM #12
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I own several Toy's and have pushed beyond it's normal life cycle.
My 93 pick -up with 3.0l still have the original alternator @ 262k
My 99 4runner with 3.4l was just replaced early this year @310k
My 2003 4runner with 4.7l was replaced last year @ 235k
I have a 1987 FJ60 replaced the alternator back in 2007 and I think it was an original unit @ 195k (20 years). That's why I don't waste my time with bargain units and trying to save a few dimes and ends up costing more.
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Old 04-22-2019, 06:11 AM #13
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03 V6 SR5 bought new, original rad, alt, starter, o2s n cat(lol been running with CEL n vsc lites on for at least 5+ yrs)...252k


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Old 04-22-2019, 08:33 AM #14
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Mines original at 148k. That said. I have it in my amazon wish list ready to go because I assume its in its retirement age lol.

https://www.amazon.com/Denso-210-051...ype=automotive
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Old 04-22-2019, 09:33 AM #15
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205k miles, original alternator. mostly highway driving.
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