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1.8TFSI and 2.0TFSI S3 : Metallic Rustle/Rattle between 1500-3000 rpm

Discussion in 'New A3/S3 (8V Chassis)' started by Dakar, Apr 1, 2014.

  1. Dakar
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    Dakar New Member

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    There have been numerous posts in various forums and threads from people experiencing this problem. Let's try and collate all the information we have so far.

    Vehicles affected: A3 1.8TFSI and 2.0TFSI S3 engines on the 8V chassis. (and potentially Seat Leon 1.8)
    Sound: Rustle/Rattle sound heard at low rpms, between 1500-3000. The noise has been reported to be more prevalent during colder temperatures.
    Example: https://www.youtube.com/watch?v=vK7uVtBok48 (you'll hear the sound around the 9second mark)

    The 1.2, and 1.4 A3 and Golf 7 engines have had similar 'rattle' problems which this issue sometimes gets confused with, but that could be rectified with an attached clip part. Unfortunately the above problem cannot be fixed with the clip because the turbo's are completely different on these engines.

    There is a long German thread detailing the problem too, Google Translate should give you the basic information:
    1.8TFSI und 2.0TFSI S3 - Sammelthread: Rasseln im Bereich Beifahrer von der Abgasanlage : Audi A3 8V, 8VA & 8VS

    Please post if you're experiencing this problem too.

    Engine:
    Current vehicle age:
    Details on how you hear the noise:
    Any information/testing/work you have received from your dealers/Audi:
    Last edited: Apr 1, 2014
    #1
  2. Dakar
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    Dakar New Member

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    Engine:
    1.8 TFSI Stronic

    Current vehicle age:
    8 months

    Details on how you hear the noise:
    Since I purchased the car, I can hear it every time I drive. Sometimes quieter sometimes very loud and audible over the radio and outside the car.

    Any information/testing/work you have received from your dealers/Audi:
    I've had numerous tests done, from exhaust to wastegate to turbo. Sound recording equipment installed by Audi and the noise measured. Turbo was replaced last week in an effort to resolve the problem, but made no difference. Audi HQ told me several cars were experiencing it and hoped replacing my turbo would be the solution, which they could roll-out to the others..

    Currently they're back to the drawing board trying to figure it out, the engineers at Audi HQ are apparently investigating but no news or updates. I don't think enough people are reporting this to Audi to give it priority.
    Last edited: Apr 1, 2014
    #2
  3. andywil13
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    andywil13 Active Member

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    I have the 1.8 TFSI (auto) and have this problem. Currently waiting to hear back from my dealer.

    I would describe it as a metallic sound. You can hear it slightly when in the car, but if someone else drives the car off my driveway it sounds worse. Now its summer in the UK, I can hear it more with the window open.
    #3
  4. danilotto
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    danilotto Member

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    Same problem here.

    2.0TFSI S3
    1200 km
    #4
  5. scrich7
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    scrich7 New Member

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    This is interesting. Joined today as always liked the new A3, albeit I have a new Leon 1.8 which I'm fairly certain has an identical engine.

    I'm guessing the sound in experiencing is the same, tends to be around 2k rpm and is more prominent when the engine is cold. I'd probably describe as a kind of rustling leaves type noise?
    #5
  6. JohnnyM100
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    JohnnyM100 Active Member

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    Yep I have this too.

    1.8T S-Tronic ~5000 miles.

    It's a hollow metallic tinkling rattle noise somewhere between the sound of a twig in a bicycle spoke and a small stone in a (metallic) hubcap. Reminded me of the noise a jet engine makes when boarding a plane and the turbine fans are free spinning very slowly.

    Most noticeable when cold and especially 1750-3000 rpm on gentle acceleration.

    Audi are looking into it.

    Dakar - there are quite a few threads on this already and I know your intent is to consolidate. Suggest also change the title as its not a scraping noise (at least not in my case or in the video).

    John.
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  7. Dakar
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    Dakar New Member

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    Yup, good description
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  8. Dakar
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    Dakar New Member

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    Sure, but what does the noise sound like then. It's not a 'rattle' in my opinion either. Everyone describes it a little differently :think:
    #8
  9. danilotto
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    danilotto Member

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    Yes! This is a perfect description of the noise.

    Someone noticed if it tends to get worse? Are we sure it does not affect or degrade other components?
    #9
  10. JohnnyM100
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    JohnnyM100 Active Member

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    Mine has got louder over time yes.

    As for effect on components? I guess no-one will know until the root cause is identified.
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  11. danilotto
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    danilotto Member

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    Someone noticed if the noise occurrence affects, at a certain point, the performance of the car? (i.e. loss of thrust)
    #11
  12. Dakar
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    Dakar New Member

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    I think you definitely notice the noise more, whether it gets worse over time is hard to say.

    Audi have assured me several times, and in writing, that this problem is not causing any damage. But I take that sceptically seeing as they can't even deduce what's causing it..

    I haven't felt any loss in performance.
    #12
  13. danilotto
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    danilotto Member

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    Obviously Audi cannot admit that it causes a damage. Event if it could be. There would be a crowd of panicked owners in front of their dealers.

    As an electronic designer I cannot understand how they can say they are unable to locate the root cause of a product they built from scratch and know in the whole assembly process. I know my products and I always can troubleshoot them, also if the fault is from a supplied component due to the fact that the interaction with other parts must be fully understood before releasing the product to the market. It is even more true if you think that plenty of super-brain german engineers are supposed to design the car.

    In the end

    1) If it does not cause damage to other parts of the car, compromising its reliability during time
    2) If it does not alter the performance of the car
    3) If it does not get worse

    then I think I can live together with it. With such complex mechanical devices (ok not a jet engine nor a space shuttle rocketdyne engine) it is very hard to obtain stable behavior in the lifespan of the products.

    My bmw had a squeaky rear suspension at 8000 km and no-one in BMW has been able to fix it.
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  14. S3 TRS
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    S3 TRS Active Member

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    yup summer is definitely here . foggy and cold. good old British summer! :icon_thumright:
    #14
  15. andywil13
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    andywil13 Active Member

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    My Audi dealer just called me. When i took this into them the other week, they said the noise was a "characteristic of the car" They have now said that Audi are aware of the issue, but no fix as of yet.

    At least they are admitting to it now. Apparently Audi centers are being told not to replace any parts for this problem at the moment, so sounds like they are trying to get a proper fix. They will show me the bulletin when I take the car in next week for a firmware update to fix something else (sigh)

    will see if I can get a photo of the bulletin and post it up
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  16. Dakar
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    Dakar New Member

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    Nice, good to hear Audi is being more transparent about the problem.
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  17. Dakar
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    Dakar New Member

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    Ever get that bulletin?

    Here's the german one google translated:

    #17
  18. danilotto
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    danilotto Member

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    So they now discovered the root cause of the noise: the wastegate rod! Right?

    It also looks like that it does not cause damage to other components of the engine or exhaust system.

    The solution looks staightforward to my eyes: something like a weight to change the resonating frequency of the rod.
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  19. Joetidman
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    Joetidman Member

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    I imagine they'd need to change the component for something with the same dimensions etc, but with a different material makeup to adjust the resonating frequency. However, given the risk of doing that with an untested component (not to mention cost), I doubt they will go down that route...

    Might be a ECU adjustment to adjust turbo parameters to avoid it, but they would have knock-on effects as well, I suspect hence they don't have an answer right now...
    #19
  20. veeeight
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    veeeight Well-Known Member

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    Hmm.

    It's an electrically operated wastegate on this particular engine.
    #20
  21. labmousee
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    labmousee New Member

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    I have the same problem from the moment I took my Leon MK3 1.8 DSG from the dealership, about 6 months ago.
    I am not around ~5000 KM and I am almost sure it sounds worse.

    I would describe the noise as a metal broom being dragged on the asphalt. 1500-2500 RPM.

    I wanted to locate a recorder under the car to record the sound, but didn't have the chance yet. Does anyone have a decent recording of the noise?
    #21
  22. Dakar
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    Dakar New Member

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    Heh another good description. Haven't been able to get a good recording or find one from someone else.

    Please give try see if you can, I'm also thinking of attaching my gopro under the car - might work.
    #22
  23. Veneeringman
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    Veneeringman Bazinga

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    I had something similar on a MK6 Golf GTi a couple of years back, sort of rasping rattle between 1600-2500 revs, well known issue (same engine family E888 i believe)
    It went into VW Oldham and they were aware of the issue, apparently the fix for those cars was a 'Clip' put on the wastegate rod to stop the vibration at certain revs.
    #23
  24. andywil13
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    andywil13 Active Member

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    I wonder if a few of us ranting on the Audi twitter page will work? (assuming they have one) I've heard companies are quick to respond to public complaints
    #24
  25. labmousee
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    labmousee New Member

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    I think what you had was this noise which was caused by the mesh on the downpipe, no?

    https://www.youtube.com/watch?v=__aLctQuLdk
    #25
  26. Veneeringman
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    Veneeringman Bazinga

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    it was to do with the wastegate actuator rod and as i said above the fix was to put a special clip on it, spoke to one of the technicians at VW when i collected the car, there is a video on you tube that shows someone putting the clip on.

    https://www.youtube.com/watch?v=xAkkIEMm3UQ
    #26
  27. danilotto
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    danilotto Member

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    I cannot understand: Audi just told that there is no fix at the moment. So how the video is related to our problem?
    #27
  28. JohnnyM100
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    JohnnyM100 Active Member

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    Great description!

    John.
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  29. Dakar
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    Dakar New Member

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    It doesn't - thats a seperate issue for the Golfs that a clip can fix. That clip does not work on the 1.8 and S3's because their engines are designed completely differently - a new solution needs to be designed by Audi.

    They are officially working on it now from the bulletin they sent out, we just have to be patient..
    #29
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  30. Veneeringman
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    Veneeringman Bazinga

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    It's not i was just showing Labmousee that it wasn't the mesh on the downpipe.
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  31. labmousee
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    labmousee New Member

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    The sound that I have sometimes resembles to the sound that the mesh makes.
    #31
  32. STERLING VOID
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    STERLING VOID Member

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    What does that mean?
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  33. JohnnyM100
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    JohnnyM100 Active Member

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    I think it means no repair attempt at this time, until a solution is found.

    John.
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  34. STERLING VOID
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    STERLING VOID Member

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    So what if my car is out of the one year warranty, would they still apply the fix?
    #34
  35. Dakar
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    Dakar New Member

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    Yes they definitely will, they just mean claiming warranty to get your turbo replaced is not allowed as this won't fix the problem anyway.
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  36. Joetidman
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    Joetidman Member

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    I can hear a highpitched metallic 'tinkling' sound under gentle acceleration at low-ish revs, is that what you are all referring too?
    #36
  37. labmousee
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    labmousee New Member

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    Ya ya
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  38. Silky-S3
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    Silky-S3 Is loving his new 8V S3!

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    I've got this issue too.
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  39. Scott
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    Scott Well-Known Member

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    I had the wastegate rattle on my previous MK6 GTI but as mentioned, it's a different fix. I haven't noticed it on the S3 but I have noticed it seems to make a 'very slight rattling' noise even at idle-3000rpm, I dunno if it's this or not but I'll just wait for a fix and ask them to do it anyway
    #39
  40. dragon
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    dragon A3 Fan

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    That's what I hear Joe!!
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