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It takes 5 minutes to replace the brake servo sensor, at least another 5 to clear the fault. They charged my pal 660 to do the work on his car. I personally replaced mine by myself and I am certainly no mechanic. They are rip offs!!

No this is generic advertising like Facebook etc from things you've searched previously via the use of cookies etc.

The important figure is your rolling radius which will have changed, but that’s determined by the profile of your tyre etc (website will help you with the cals) https://alloywheels.com/tyreCalculator Surely the correct way to do this would be to speak to Audi and do it t properly rather than fudging it with some after market gadget. Personally I wouldn’t touch a vehicle that has been modified with a mileage blocker - doesn’t give off the right message to me.

Hi been watching this one and would be more than a little shocked if you were actually promoting this kind of grey area and possibly illegal part being a recommendation of this forum, most people research which size wheel and tyre combination would suit and retain the original rolling radius as Grayskull pointed out, do it the right way and you don't have to change any coding or anything else for that matter apart from which I can't see the attraction in driving around with rubber bands on each corner, apart from the accelerated puncture problem I doubt the insurance company would be impressed, on some of my previous cabs I have had a right hard time explaining why I wanted to go from 19inch to 17inch wheel and tyre combinations, what solved it was copies of bills for my puncture repairs and they finally grasped the concept of more rubber less punctures the only other stipulation was that I used O.E. wheels in the chosen size that was fitted to that range of vehicle, they are not keen on aftermarket wheels as the failure rate is far higher than the manufacturers wheel because they are made of inferior alloy, thats why they are cheaper. Steve.

But even if you do that won't the needle be slightly off?

Audi will tell you what you need to do .. depending on the age of the car, it’ll either be a change to the gearing on the Speedo cable (something like that) or a code change. you won’t be the first to do it, so ask the professionals for the correct fix.

Sorry Mark, but your friend’s and your reasoning, just doesn’t lead to reasonable justification to me. Being polite, it might just be me, but…. Kind regards, Gareth.