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  1. #1
    Veteran Member Four Rings Kittrell's Avatar
    Join Date
    May 07 2008
    AZ Member #
    28523
    My Garage
    01.5 S4, C6 S6
    Location
    Broomfield, CO

    Bosch vs. Valeo Alternator

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    Swapping out the alternator in my '01.5, which has a Bosch. I purchased the Valeo alternator from ECS listed as "for Bosch cars". My pulley however does not match what I received (which is accurate from ECS photos). Curious what needs to happen, as I know the difference between the two has always been the pulley. I'd rather not deal with swapping between if I can, they seem to mount differently. The pulley on the new unit looks smaller, so I thought maybe the belt is smaller. But I did not see any difference between the belt options.

    https://www.ecstuning.com/b-valeo-pa...38903018fx~va/



    Last edited by Kittrell; 03-14-2019 at 07:12 PM.

  2. #2
    Veteran Member Four Rings
    Join Date
    Feb 18 2004
    AZ Member #
    684
    Location
    USA

    Mine came with a black pulley though. I bought it from FCP. https://www.fcpeuro.com/products/aud...20a-078903016h


    Last edited by DolphinV8; 03-15-2019 at 09:47 PM.

  3. #3
    Veteran Member Four Rings Kittrell's Avatar
    Join Date
    May 07 2008
    AZ Member #
    28523
    My Garage
    01.5 S4, C6 S6
    Location
    Broomfield, CO

    I just ended up installing it, no issues. If I have to swap another alternator on the 2.7 in my life it will be too soon.

  4. #4
    Veteran Member Four Rings
    Join Date
    Nov 14 2013
    AZ Member #
    130116
    Location
    earth

    Just a different style pulley.
    Also after youíve done the
    alternator once youíll be able
    to do it under 2-3 the next time
    around. Itís not as bad as it
    seems.



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