Warped discs due to over torqued wheel nuts?

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Hey Folks,

Been having a nightmare with brakes on a new (to me) car.

Long story short Audi inspected car in Dec after I reported vibration braking from 30-20mph. They said everything was fine... Used sales manager said to take it back if I wasn't happy at a later date.

I persevered for another 1k miles but still not happy, now Audi confirm in their words "warped discs", but they refuse to take any responsibility blaming the fact I had winter wheels fitted.

They're saying that the wheel nuts must have been over torqued and so warped the discs. But they have no evidence to support this, no visible damage to bell housing on discs and no measurable indication on bell at all (floating discs).

So I feel like they're full of BS and trying to save themselves the £2k they're trying to charge me.

Has anyone had warped discs due to over-torq? To be honest i've been fettling cars for 20yrs and never heard of this, let alone experienced it.

Web searches throw up a couple of results but not much.

Ta

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Yeah afraid so, initially thought it just needed run in as it had been sat on the forecourt. It's not a major vibration, and very specific at 30-20mph when braking hard.
I didn't even notice for the 1st few weeks I don't tend to emergency stop all the time, it was just when someone pulled out on me that I hit the brakes hard and noticed it.
But it's been a constant issue the entire time i've had it now, luckily not getting any worse but it's just irritating.

Dealer inspected the car less than a month / 1k miles after I collected it, (7days after the winter wheels went on) and told me all was fine, but any lasting issues and they'll replace the discs...

I complained again now after another 1k miles that i'm still not happy, they look at car and now confirm brake discs "warped" but that it must have been the wheels being over torqued when fitted!

I've pointed out that they already said they were fine with the same wheels on previously, and questioned how it could suddenly be that causing the issue, and that if they're mechanically damaged in this way there must be evidence, but to no avail.

Eugh.

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To confirm, it's not ABS pulsing. On the extremely rare occasions the ABS comes on I've more important things to worry about than brake feel... like clean underwear!

The dealer have stated warping, but as you mention I imagine it's actually going to be uneven deposits. They still have the car so I can't visually inspect yet.

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Thanks for the in depth input wookie, much appreciated.

It's a 64 plate RS4.

I've heard nothing from audi dealer at all today, so either they've sent it up the food chain or they're just incompetent and rude (They still need to return my car and pick up the courtesy car I have).

The service techs have already proven to be incompetent (I had to inform them of the service schedule for example) so who knows...

So to try and prove this one way or the other I should demand a brakeview test be carried out?

Thanks again

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Worth repeating is the fact that audi inspected the car in Dec, after wheels were fitted and said it was fine.

Now they confirm "warped discs", but suddenly it's been caused by wheel fitting...

They can't have it both ways!

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OH MY WORD.

What a marathon...

After many, many emails back and forth between myself, the salesman, the service manager and the aftercare manager over more than a week, they have finally relented and fitted new discs and pads all round!!!! Car is being delivered in a few hours.

There has been no apology for the extremely poor way I feel this has been handled, but i've got the outcome I was after so i'll take that as massive win regardless.

Many thanks for all the helpful replies (especially the wookies expert views).

Now I just need to hope the issue doesn't repeat itself...

Cheers!