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Hi all, just to add my own experience with this - i got the same warnings this morning (brake servo restricted + start/stop fault). At first i decided to ignore as it wasn't in yellow or red. But then i got on the internet spent couple of hours reading other peoples' experiences and i got scared (didn't want to pay £3k for new ABS system). I called my local workshop, who said they didn't do such things. Then i called Audi to book an appointment with them, but they don't work saturdays. I tried to book online, the first available slot was next saturday. Then i decided i'm going to replace it myself, looked quite easy on youtube, part available on ebay... And then (after reading the last posts here) i remembered i have audi roadside assistance cover🤦‍♀️ I called them straight away, they came in about 1h, the guy was an audi guy and he was amazing. He knew about this fault of course, he said a lot of cars have it and he was really glad i called them straight away on the first day the message appeared. He said he wouldn't recommend driving the car with this fault as it only take certain amount of presses on the brake till the ABS system breaks. Luckily he had exactly the same part with him (apparently there are two types - A and B but he had one of each with him) , he replaced it in no time and diagnostics came out clear, message disappeared...sorted. All covered i didn't pay anything extra. He also said that even if he had not had the part with him, he would be back here on Monday with it. So if you do have roadside assistance from Audi, just call them. Don't wait, it sounds like it can get really pricey. Also, if you call audi assistance, you're actually calling the yellow AA and they can dispatch any car - it can be the regular AA or Audi guys. Just insist that you want the Audi guys, even if you have to wait a bit longer. The regular AA won't have the parts and probably won't even know about this issue.

Admin, Is it possible to create a “sticky” including details of the correct part number, the excellent video showing how easy it is to replace the part, you don’t need to go to a dealer unless it’s a warranty claim, and finally, a warning not to drive the car further than necessary, regardless of the dashboard warning? Many thanks.

Hi Carl Speaking as one of the unlucky ones who had the fault, went to Audi who diagnosed a new sensor was needed but didn’t have one in stock, then was allowed to drive away with a return booked for 2 weeks hence. 4 days and 19 miles later the ABS ‘bricked’ borrowing a term being used on this forum 😂 I had my car relayed to Audi then had a huge bill, £3600, to get my car back. My heartfelt advice, contact Audi Assist who have been known to carry these sensors on their AA vans 🙄 and do whatever is needed to have them come out to you. If the dealer says they will cover costs then the small cost of joining Audi Assist £99) should be a bonus to you going forward. Good Luck Pen

Steve Q, Eureka, mission accomplished, I was able to circulate the number to a few breakers and one of them came back with the part, happy day’s! thanks again for your support! Turlough

Hello Carl, My strong advice would be:- Notify the seller. Order a genuine Audi sensor. Do not ( in caps) drive it until the part is fitted. Fitting it yourself? Yes OK, but I think you run the risk of negating your seller warranty if you do - you would need to speak with them about that. Kind regards, Gareth.

Tell me about it, just shear bad luck. The company I’ve bought it from are probably totally unaware of this fault. Rather than bill them £3000 for a new ABS unit (which arguably they wouldn’t pay out for), I’ll just order a sensor part and fit it myself. I know there are different ones to get, but I think I’d feel safer knowing it’s coming direct from Audi so will give them a call today. I just hope this isn’t going to be a recurring problem, I can’t imagine the sensor gets changed just the once and it never happening again ..

I can't believe you got the warning message 1day after you received your car! Personally I would advise against driving the car. The ABS system bricks once it reaches 20 'cycles'. I don't know what constitutes a cycle, but it really isn't worth it. If the garage you bought the car are covering the cost, just buy a genuine part from Audi (it's about £90) and fit it yourself. It's so easy, it took me less than 5 min to replace the part

Have you got the warning message on the dash? If so, and it's under warranty, see book it in with Audi and get them to look at it now, before it bricks the ABS system. Who knows what small print they will use to wriggle out from covering the costs! Even if they did cover the costs, it becomes a much bigger job to change the ABS system than just the sensor..

all sorted, removed the actuators, cleaned and greased and good as new 😁

I'd get the battery checked as a priority.

How old is the battery? Failing batteries can cause all sorts of weird electrical issues.

That’s brilliant - I shall give it a go over the weekend. WD40 will probably smell better than me anyway….