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Thread: Engine undertray fasteners

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  1. Engine undertray fasteners 
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    Two of the fasteners attaching the engine undertray on my B6 Avant have disappeared. They're the ones holding the small deflector that sits ahead of the offside front wheel, causing it to droop and giving the whole tray a lopsided sag on that side.

    Does anyone know the relevant part number, by any chance?

    I'm contemplating a temporary ziptie bodge of some kind, but it'd be nice to get it properly sorted. My old Octy developed a saggy undertray which grounded more and more frequently, resulting in its eventual disintegration. I'd like to avoid that, if possible...
     
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  2. Re: Engine undertray fasteners 
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    Not unusual for the fastners to vibrate themselves free. I started using nylon zip-ties. They're very strong and if you're servicing the car yourself, you simply cut and replace them.
    2016 BMW i3 REx (25k)
    2012 A4 Allroad Quattro 2.0 TDI (55k)
    2003 A2 1.4 TDI SE (166k) sold
    2001 B5 A4 2.5 TDI Avant Quattro Sport, (173k), sold
    1995 B4 80 1.9 TDI Avant SE, (175k), sold
     
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  3. Re: Engine undertray fasteners 
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    Yes about 4 of mine have disappeared - I asked the garage to replace them on Friday - must look to see if they have. Tried to find the part number but failed, you may need to phone Audi...can you post the number when you have!
     
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  4. Re: Engine undertray fasteners 
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    Zipties sound like a great solution... except having had a closer look I can't see how to make them work in this case. For each missing fastener there's essentially a single hole. A ziptie needs an entry and an exit hole to make a loop... unless I'm missing something blindingly obvious
     
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  5. Re: Engine undertray fasteners 
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    Quote Originally Posted by randall977 View Post
    Yes about 4 of mine have disappeared - I asked the garage to replace them on Friday - must look to see if they have. Tried to find the part number but failed, you may need to phone Audi...can you post the number when you have!
    I'll let you know if I find the answer!
     
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  6. Re: Engine undertray fasteners 
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    Snap, I'm missing a few. They don't seem critical but are the ones near the arch. Would like to get some. I've used ties in the past too...
    A4 1.9TDI 160bhp Sport - 2001 (51)
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  7. Re: Engine undertray fasteners 
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    Seems like this never got solved, can anyone advise on part numbers for fasteners please?

    cheers ian
     
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  8. Re: Engine undertray fasteners 
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    Seems like the following numbers might be relevant for the various different ones holding the tray on depending whether it’s
    -wheel arch
    -bumper
    -strut shared with gearbox cover or at front near bumper

    but I haven’t figured out which is which
    8E0805121A

    8E0805121/8D0805121

    8E0805121B


    and some Have a rubber washer which may be



    EDIT:
    I have figured out that 8E0805121A is the one at the front edge holding the bumper to the belly pan. The corresponding “nut” for these is lower profile
    8E0805960 And seems a bit rarer/expensive on eBay but i think I’ll try to fashion something from one of the “normal” Ones that go with
    8D0805121
    Last edited by ianlovatt; 08-11-2020 at 08:52 PM.
     
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  9. Re: Engine undertray fasteners 
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    See if these seem right as well:

    Spreader river (little panel in front of wheel arch): N0385491
    Grip pin: 8D0805121 (...B suffix for black)
    Washer behind varous connectors: 4A0805137
    ======

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