Jade Z

Hi All, Just to update, I purchased a brake pressure sensor from Audi dealership for £74.10 and replaced the broken one in a couple of mins. All the error messages were gone. Big thank you to this forum and to Simon Ryder for the instruction. Clearly this is the way to do it when the error messages first appear. Please take care everyone. J

Hi C87, Just to check whether the booster sensor you replaced is the same as the part photo that Simon showed in his post? I am still waiting for my appointment with Audi and it’s frustrating as I can’t even use my car. I am tempting to replace it myself now. Look forward to your reply. Thanks. J.

Hi, I called Audi and there is a 4 weeks wait before they can make a diagnosis. It will cost £99 simply to check it. From what you guys described I might be better leaving the car untouched until then. I did test drive it a bit that day thinking the fault could be due to rust in the brakes as it was not used for a couple of weeks but hope it hasn’t done much damage to the ABS. I agree that it is either Audi’s design fault or they are using a highly unreliable part in the critical components compromising safety. I agree as owner we must voice our concerns/complaints particularly it happened to so many of us. God knows how many others have had the same problem who are not connected to this club. Will give you an update when mine is diagnosed and repaired. Definitely will write to Audi to complain. Please take care J

Hi everyone, I have an A4 Diesel 2.0 2016. Exactly same problem: parked in the drive for a couple of weeks not using. I drove today and the brake servo/start/stop error messages appeared. The brake felt a bit funny too. After seeing everyone’s post, it seems clear to me that this can either be a design fault or a poor sensor with only 3-4 year’s life span. Just can’t believe it happened to Audi. As it’s outside warranty I guess there is nothing we can do but pay for the repair. Frustrating...