Foxy11

3 minutes ago, PHB said:

With this information on the web how can Audi say they are not aware of the problem! Having replaced the sensor does anyone have any idea how long it will last. My sensor failed after 24k miles, may be worth carrying a spare, but there again there are a lot of sensors on an Audi 

My shiny new one has 2 years parts and labour 🤣

Original had done just over 20k.

Glad to hear people appear to be having luck when catching it early enough 🙂

Just wish i'd seen this thread earlier and done the same! 

Got mine back and now fine, £1600 lighter with new ABS unit and sensor. Will check the invoice for part numbers and prices later in case it helps any. 

21 minutes ago, Reavley said:

I have a 2017 A4 saloon 2.0 petrol. The brake servo restricted light came on 2 days ago but I didnt get around to researching it until today as I felt secure with the dashboard message saying it is ok to continue driving. Turns out that is a false sense of security and I wish I had looked up the issue earlier but I'm hopeful that I can still get away with the simple sensor replacement. After ringing around the 3 local dealerships it sounds like one of them has stock but annoyingly the parts department at that dealership haven't been answering my calls all day! It sounds like the part number has recently been updated to have a B at the end rather than the A I had seen on earlier threads. I believe the part number for the sensor is now 5Q0906207. I will try contacting the dealership again tomorrow. Fingers are crossed... 

This is my first Audi and I am very disappointed that it feels like Audi have their eyes closed (deliberately or not) to a simple and cheap fix that could save owners £ thousands. At less than 4 years old I had no dreamt that I could be on the line for such a costly repair, made only worse when I read how common this fault appears to be.

Hindsight is a wonderful thing, but I'd stop driving it now if you can and book in for inspection ASAP. I was fairly surprised when questioned when my dealership said they could get the parts tomorrow and it would be ready by the end of the day, was expecting them to be on back order. 

I'm the same re: my first Audi and one of the reasons I made the switch was to hopefully avoid issues of this nature, after a long and protracted argument with Ford regarding a major design flaw and known issue. 

It certainly seems that bare minimum they should have a resolution/update around the servo restricted error in order to clarify the potential seriousness of the issue rather than intimate that continuing to use the vehicle is fine. 

I also wondered personally, if it's clearly an issue with ABS once it gets that far, why there is no apparent ABS error/warning light. 

Anyone any further updates?

I've had mine inspected today, knew what was coming when the first question in the phone call following inspection was whether or not I had any extended warranty... 

As suspected, they've diagnosed it needs a replacement ABS controller which would be a cost of £3200.

Before I even reacted, they told me that because I have a service plan and have booked my service etc with them since getting the car, they'll 'go halves' with me at £1600.00 as a goodwill gesture.

On pushing for a reason for failure and mentioning the low mileage/age, they said it was that the hydraulic boost had only a certain number of engagements and the problem/error had caused this limit to be reached. In replacing the controller, they'll also replace the sensor. 

Given I've not really anywhere else to go with it and really need the vehicle available, I've reluctantly gone ahead and will likely take it up via email with Audi retrospectively, given the nature of the problem and dashboard messages at odds with the seriousness/impact of the issue. 

6 minutes ago, Roddy Mac said:

Hi Foxy. 

The whole situation is a disgrace and needs exposed. I hope it works out for you. You aren’t still with Audi Assist by any chance?

Roddy. 

Unfortunately not, not under warranty and not Audi Assist. Bought through a third party to the dealer. 

After a few voicemails as its currently impossible to get through, just booked in for inspection 3rd June. 

Some good info on here thanks, though fear I might have found it too late 😞.

After a recent service, I had a sporadic 'Brake Servo: restricted. You can continue driving. Please contact workshop' message. I intended to call and discuss with the dealer, but it disappeared and I saw no obvious change to braking.

This message then recently returned and I noticed a light clicking/grinding sound when applying the break at very low speeds (crawling in traffic/slowing for expected traffic light changes/parking), before I've had chance to book in for inspection following it's return, it's now switched over to 'Brakes: fault. Safely stop vehicle' and the red warning, there are no other lights, no ABS light etc.

I'm calling the dealership shortly, but with what I've seen in the thread I'm fearful that I've progressed through the 'You can continue driving......' -> '......therefore knackering the ABS' trap 😞

Particularly galling, as I made the switch to an Audi on reputation (and that I've always wanted one) but also necessity, when my Ford Focus trashed it's engine due to a 'known fault' with the Ecoboost cooling system and temperature reporting... Effectively wrecking it's own head gasket/engine one fateful ten minute drive. At 20k miles and feeling still almost brand new, I wasn't expecting a fault of the likely costs if my fears are correct.