kh904

Ok, so an update.... I called the local Audi dealer and checked if they had the part in stock and they had 1 left (part number ending in B) which I reserved. It cost me £84.42. I got there and spoke to the parts guy and asked if they had many people come in for this part and he said yes and one person came in yesterday with a similar problem. To told him it's naughty from Audi as they/car dashboard are giving misleading information and he agreed. Anyway I got home and replaced the part - it's so easy that nobody should ever need to pay anyone else to change it. It took me 2 minutes (if that)! Shame on any garage charging more than 5min labour! Anyway, I started the car and so far I haven't had the warning light come on, but then again I only reversed a few meters back and forward in my drive. I will have to take it for a longer drive later when the roads are clearer to confirm that it's sorted! Looking back, the fact that the start/stop function was intermittent for a while maybe was a sign that there was a fault/sensor was failing, before the actual dashboard gave a warning! I would highly recommend getting a obd scanner too (which I recently purchased a couple of months ago) and it really helps to narrow down the issue and search on the net for advice - that's how I found this forum! Many thanks to all those who have contributed to this and the other main thread!

It was by pure coincidence that I was driving to someone's house yesterday to run an Obd11 scan on their car when my warning message popped up. I drove the car twice (there and back) and did around a total of 15 miles! As soon as I got home, I ran the obd11 scan on my car and got the fault codes: C11EC04 - Brake Booster pressure sensor faulty U041500 - Invalid Data received from Anti-lock brake system control module I'm not sure if the 2nd fault code is triggered due to the 1st? I searched online and found this site and THANK GOD i did, as the results could have been extremely expensive if I assumed that it was ok to continue to drive (as per the warning info saying that I can 'continue driving'). To say i'm livid with Audi and the way they have washed there hands with the issue from other owners is an understatement! If they have received lots and lots of complaints from people with the same fault, then they really need to send out a recall notice! Fingers-crossed I haven't bricked my abs system! I curious to know that there is some of of 'counter' in the ABS system and if you reach 20 cycles (I think), then the ABS system bricks and you are left with a huge bill to replace. What would constitute 1 cycle and if I replace the brake servo pressure sensor (run obd11 and clear the faults), does the counter reset to zero or permanently log the fault?

Thanks Steve Q! So it won't be an issue if can only get my hands on the part ending in A? I wonder what the actual difference is between the 2? Better design/engineering internally? What about the brand/manufacturer? The price varies quite a lot £10-£80!

Hi mate, I recommend '4rings' who are based in Dartford. I've used them before. They are not the cheapest but are excellent!

Hi guys, I've just had the same warning come up on my A5 Sportback (2018) 2.0 TFSI. I'm going to get myself a replacement brake servo sensor, but does anyone know if there's a major difference between part numbers: 5Q0906207 and 5Q0906207B ? As far as I understand the 5Q0906207B is backwards compatible but I don't know which part number I should be going for! Also do people recommend going for an OEM part (VEMO) which seem to cost around £70 or a generic brand which cost around £10-20?! Thanks