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-   D4 - Axles, Brakes, Suspension and Steering (http://forum.a8parts.co.uk/forumdisplay.php?f=102)
-   -   Thunk from rear going over potholes or bumps (http://forum.a8parts.co.uk/showthread.php?t=15938)

Slabber 29th October 2020 06:49 PM

Thunk from rear going over potholes or bumps
Every time I go over a pothole or a bump in the road I hear/sense a 'thunk' from behind me. My garage have given the suspension a thorough going over and can't find anything wrong. The exhaust seems to be firmly in place. Anything else they could check?

ainarssems 29th October 2020 07:12 PM

Rear diff bushes and check if the spare wheel is secured in the boot or any other loose items in boot / spare wheel well.

Slabber 29th October 2020 09:40 PM

Thanks for that! Spare tyre is definitely secure but rear diff bushes sounds like something that may not have been checked.

Slabber 2nd November 2020 06:47 AM

Okay, my garage (Audi independent specialist) have now given my car a thorough inspection and can't find anything wrong with the suspension, nor with anything else that might be causing the 'thunk' from the rear. They can hear the thunk though, which is something I suppose. I'm now considering having some rear suspension parts replaced on a speculative basis. Grateful for suggestions as to what to start with!

Slabber 28th March 2021 12:20 PM

Update to help someone else in the future.

I finally had my garage do an in-depth investigation in to my suspension 'thunk' and it turned out that a new air suspension strut that was fitted last year was faulty: when they took it off (which is a massive job BTW) there was something loose inside. Luckily it was under warranty and even better the manufacturer was happy to accept the warranty claim via a video of the strut making a noise rather than having to ship it to Germany for inspection. New part now fitted and the thunk gone!

Joe2.0E 28th March 2021 05:39 PM

Glad you got sorted at last.
Was the faulty strut a genuine part or aftermarket ?

H-M3 29th March 2021 12:49 AM

Might be useful for us if you can upload the video of faulty parts+++

Slabber 29th March 2021 08:46 PM


Originally Posted by Joe2.0E (Post 164194)
Was the faulty strut a genuine part or aftermarket ?

Aftermarket. I didn't mention the supplier as I'm not 100% certain (my garage handled everything), although I'm pretty sure there is only one major supplier of aftermarket air suspension parts in Germany. Aftermarket doesn't necessarily mean cheap though: still 550+.

Slabber 29th March 2021 08:47 PM


Originally Posted by H-M3 (Post 164198)
Might be useful for us if you can upload the video of faulty parts+++

I'll check if my garage are happy for me to post it.

Slabber 4th April 2021 10:15 AM

1 Attachment(s)
Here's the video! Nothing to see per se - just the noise coming from the strut.

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