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How to test if DV has failed on 2.0 tfsi

Discussion in 'Audi S4/A4/A4 Cab (B7 Chassis)' started by slim boi, Jul 20, 2011.

  1. slim boi
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    slim boi Member

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    [Jul 20, 2011]
    Hi all as above how do i test if the DV has failed or how do i check and is it easy to get to.

    cheers Mat
    #1
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  3. ChrisFurlong
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    ChrisFurlong Avantageous

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    [Jul 20, 2011]
    If you have access to VAG COM, scan for codes, and you should see a low boost code.

    If you don't have access to VAG, then to physically check it could be a bit fidly. I changed mine when I did my cambelt, so was very easy to change. You can do it without taking off the front end, I think most people do it by taking off the undertray and accessing it from underneath.
    The DV is located below the turbo, and is held in by 3 bolts. Undo 3 bolts, unclip harness, plug in new DV, plug in harness, and screw 3 bolts back on, very easy.

    To see if your DV is blown, and if you have the older revision B membrane style, just pull up on the knob around the membrane. With mine there was lots of holes in the membrane. If you've got the metal impeler style one, it shouldn't go wrong.

    It is well worth changing the DV to the revision D one, if your car has a blown B revision, you will think your cars had a remap when you put in the D!
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  4. slim boi
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    slim boi Member

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    [Jul 21, 2011]
    Thankyou very much bud i will give it ago.
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  5. nickf
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    nickf New Member

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    [Jul 26, 2011]
    How much is the revision D DV then. Slowly going through mine getting it up to scratch now.

    Dents taken out the other day, new cambelt, etc. May as well spend a bit more while I'm at it....
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  6. steve123a
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    steve123a Member

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    [Jul 27, 2011]
    I just fitted the forge DV with the yellow spring to mine and it has made a huge difference, as expected as my DV went about 2 months ago and the car had no real boost.
    #5

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