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Old 04-18-2022, 12:14 PM #31
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Quote:
Originally Posted by Bluesky 07 View Post
If anyone is looking, the Denso site previously linked has remans for the 4th Gen V6. My alt is original as far as I know and at 226K miles, I’m wondering whether a preemptive replacement is a good idea.
Take a look at "about us" on that site. That is NOT the Denso site, just a cleverly named retail outlet. No mention of what parts are actually used to rebuild Denso products.

BTW, to answer my own question that started this thread:

My original alt went out at 155k miles. I heard a turbocharger sound and the voltage monitor dropped to 11 to 12 volts. Battery light came on immediately. 2008 V6.
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Old 04-18-2022, 06:47 PM #32
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Quote:
Originally Posted by Bluesky 07 View Post
If anyone is looking, the Denso site previously linked has remans for the 4th Gen V6. My alt is original as far as I know and at 226K miles, I’m wondering whether a preemptive replacement is a good idea.
Quote:
Originally Posted by Seymore Butts View Post
Take a look at "about us" on that site. That is NOT the Denso site, just a cleverly named retail outlet. No mention of what parts are actually used to rebuild Denso products.

BTW, to answer my own question that started this thread:

My original alt went out at 155k miles. I heard a turbocharger sound and the voltage monitor dropped to 11 to 12 volts. Battery light came on immediately. 2008 V6.
This Denso's official site.

ERROR: The request could not be satisfied


Edit: Not sure why the link is showing up like that with the error message...the link does work for me even with that message!
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Old 04-18-2022, 10:58 PM #33
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Quote:
Originally Posted by Seymore Butts View Post
Take a look at "about us" on that site. That is NOT the Denso site, just a cleverly named retail outlet. No mention of what parts are actually used to rebuild Denso products.

True, and thank you for pointing that out b/c I never want to mislead anyone. With that said, clicking “buy now” on the official Denso site linked by @AuSeeker refers you to three sources, the one to which you’re referring, NAPA, and one other, so it appears to be a legit source.

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Old 04-20-2022, 02:56 AM #34
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To add to this, mine just recently failed, 204K miles. Sounds like the bearings in the alternator were shot. I picked up a rebuilt Denso unit at the Toyota dealership, installed it and it sounded even worse than the OEM unit I just took off. Within the 30 seconds or so of running it, it was locked up tight when I removed it to take it back. The dealership only had that one and I needed this 4Runner drivable so I picked up a reman'd unit at O'Reillys. Hopefully it holds up!!
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Old 04-28-2022, 11:31 AM #35
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always better to replace the alternator. you have to consider the bearing too can fail at that miles.

Quote:
Originally Posted by djkurious View Post
310k on original alternator. Out of preventive maintenance I replaced the brushes.
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Old 04-28-2022, 03:16 PM #36
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Mine failed at 238,000 with the battery light coming on.

Took it to a mechanic my mom uses and trusts that was down the road instead of trying to get home 20 miles and changing it myself.

Went with OEM alternator and OEM serpentine belt since mine was old

$305 Denso alternator from toyota dealer
$70 for belt
$240 labor (2 hours at $120 an hour)
misc tax and shop stuff

$683 out the door.

Thought this was very fair and it was done in 2 days.
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Old 01-19-2023, 10:25 AM #37
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My alternator lasted 195k miles, starter seems solid.

EDIT: After pulling apart the stock Denso alternator I see why it died. There was PS fluid mixed with dirt all over and the brushes are worn down. It had a tough life.
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Old 01-19-2023, 02:01 PM #38
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2004 SR5 V6. Original Owner. 230K miles. Still running on original alternator and starter. I have thought about preemptive replacement given the very remote places I go.
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Old 01-20-2023, 12:06 PM #39
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Replaced the original alternator on my '04 last month at 119,000 as preventative maintenance...didn't want to get stranded anywhere and had a 1,000 mile drive to do in rain and snow.

Replaced a bad (original??) alternator on my '06 a year ago, about 138k miles.

Replaced the (bad) alternator for the second time on my LX 1 year ago at 138k miles and previously 10 years earlier at 62k miles (also went bad).

I used OEM every time and brought back the cores for a refund.
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Old 06-03-2023, 04:06 PM #40
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Pushing my luck after 19 years
Shopping now for OEM starter and alternator for my 04 runner. Both starter/alternator are original and at 260,000+ miles work fine daily. Going to start running to lake (3 hour drive) more frequently this summer so it is time just to be grateful and do some "preventive maintenance" Bought new 19 years ago, just indestructible, amazing machine.
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Old 06-03-2023, 07:15 PM #41
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I had a 2005 and traded it in 2020 with 187,000 miles on it. The original starter and alternator never failed.
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Old 06-03-2023, 09:44 PM #42
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'03 V8 - 267k miles and still on original starter and alternator
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Old 06-03-2023, 11:51 PM #43
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Quote:
Originally Posted by RunnerFanTenn View Post
Shopping now for OEM starter and alternator for my 04 runner. Both starter/alternator are original and at 260,000+ miles work fine daily. Going to start running to lake (3 hour drive) more frequently this summer so it is time just to be grateful and do some "preventive maintenance" Bought new 19 years ago, just indestructible, amazing machine.
Are you doing the work yourself? If so, consider rebuilding yours instead of buying a new one. A ~$20 kit from Amazon and 15 minutes of your time plus the removal & reinstallation (that’s the real fun). LMK if you want links to the YT vid and forum post I used.
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Old 06-05-2023, 11:13 PM #44
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SR5 V6 with 247k when I replaced the alternator with an aftermarket Duralast (none reman) from Autozone.

Still have the original water pump at 248K which is unbelievable.
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Old 06-07-2023, 04:40 PM #45
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The original alternator on my '06 gave out at 140k miles while I was driving and left me stranded. Had to get my rig towed home and then I put in a remanufactured Denso unit from NAPA.
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