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2006 Tundra eats alternators

Discussion in '1st Gen Tundras (2000-2006)' started by mercman, May 13, 2022 at 3:20 PM.

  1. May 13, 2022 at 3:20 PM
    #1
    mercman

    mercman [OP] New Member

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    Last year my alternator was outputting about 9 VDC. I replaced it with a new alternator and installed a new drive belt, also.

    Now about a year later I again have low voltage and need to jump start it. Identical symptoms as last year.

    What's up?
     
  2. May 13, 2022 at 3:35 PM
    #2
    Aerindel

    Aerindel New Member

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    Montana
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    2000 Tundra AC, SR5, 4.7 V8 4WD, 320,00ish miles.
    Battery.

    Battery Cables.

    .
     
    des2mtn, BubbaW and KNABORES like this.
  3. May 13, 2022 at 3:40 PM
    #3
    shifty`

    shifty` sub-80k mile club

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    Did you use OEM/Denso parts? The quality of 3rd party brands has seriously gone down the shitter in the last decade or two, and forget about reman units from those brands.

    Did you make the mistake of ordering your parts from scAmazon or fleaBay? They're well-known at this point for being a source of Bs counterfeit parts, it's rampant and no way to easily protect yourself.
     
    bmf4069, ColoradoTJ and HBTundra like this.
  4. May 13, 2022 at 3:46 PM
    #4
    KNABORES

    KNABORES Not so new-ish Member

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    2000 Limited TRD AC 4X4 Thunder Grey. 2019 Limited TRD CM 4x4 Cement Grey
    2000: Bilstein 5100's 16x8 589's with 265/75/16 and 1.25" spacers Flowmaster 50 series over the axle dump Westin bull bar with 20" LED Pioneer touchscreen with backup camera Full interior and dash LED conversion Trailer brake controller with 7 pin Bedliner coat bumpers trim and tool box 2019: ARE topper with full Bedrug kit TRD shifter
    I’ve noticed that rebuildable parts like brake calipers, alternators and starters have been of poor quality lately. As in, bad out of the box, no QC. Which sucks when your chasing a problem and think you’ve eliminated a cause and are working down the list. I second the battery cables and ground points. Big 3 upgrade. Highly recommend.
     
    shifty` likes this.
  5. May 13, 2022 at 5:54 PM
    #5
    Diablo169

    Diablo169 ROKRAPR

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    06 Double Cab 290k
    2” Lift, Bilstein 5100’s and 885’s, Rear 5100’s Icon 3 Leaf Pack and Firestone Air Bags with Daystar Cradles. Spider Trax 1.25” Wheel Spacers, Factory Wheels wrapped with Toyo 285/70r17 AT2’s.
    I had a bad battery cable at about 240k. Was corroded inside the wire casing.

    When I got the truck it had an autolite reman alternator. It went out around 260k.

    I bought a reman denso from a local mom and pop store for $200. Toyota only sells remans and they were $450.

    Denso has been working perfect. Solid 14v all the time.
     
    HBTundra and des2mtn like this.
  6. May 13, 2022 at 8:52 PM
    #6
    des2mtn

    des2mtn Currently 3WD

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    SoCal 760
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    Desert and mountain pinstripes
    You're talking about the alternator, or the starter? ;)

    I just put over 2000 miles on a Denso reman from RockAuto. 14v+ whenever the engine is running; pretty sure it will hold up.
     
    FrenchToasty and HBTundra like this.
  7. May 14, 2022 at 5:26 AM
    #7
    tvpierce

    tvpierce Formerly New Member

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    Where are you measuring voltage? (At the battery terminals? At the alternator positive post?)
     
  8. May 14, 2022 at 7:48 AM
    #8
    shifty`

    shifty` sub-80k mile club

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    FYI to anyone hunting, I have spares... one of each of these: https://www.tundras.com/threads/ran...a-vs-100a-denso-alternator-comparison.101975/

    Denso 210-1065 (130A) is brand new but got banged around in transit on its way to me, so I replaced the cracked plastic cover plate with a low-mile used one.
    Denso 210-0757 (100A) has ~3k-4k miles on it, but I swapped its plastic cover plate over to the 130A so its current cover plate is cracked.

    One could easily swap their old Denso cover plate over, as you see from the link above, it seems they're the same? YMMV.

    Anyway, I hadn't offered these up mostly because I haven't had the 130A tested yet, and haven't looked into how to test myself. They're laying around in the box though and I wouldn't turn down any sane offer.
     
    des2mtn likes this.

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