Noise of the air conditioning clutch when it is released

Squeaking from the footwell when releasing the brake pedal

Hello,

Since the first slightly colder days, when I let go of the brake pedal, I've always had a squeaking squeak from the pedal footwell, which really annoys me. When braking harder and then releasing it again, it almost never occurs. It has only become really noticeable since it got a little colder. The warmer the vehicle, the less you can hear it. In the meantime, however, it feels louder and louder and it happens more and more often, especially when it is still cold. It is independent of the driving situation, it occurs both while driving when braking briefly and then releasing it, as well as when braking to a standstill and then starting again and also when starting when e.g. the start stop was active on. It definitely does not come from the brake pedal itself, but in my opinion from the area where the rod from the pedal goes into the brake booster, where this sleeve (bellows) is around it, or from behind it from the BKV. You can now hear it when the engine is still off and you manually press the brake pedal 3.4 times until the pedal is just hard. I have already sprayed all the visible moving parts in the interior that go into the brake booster with silicone / penetrating oil, but none of that worked. That's why I was already at Audi and the service man was able to reproduce it and sprayed it again with silicone spray, but the same result ... He said if it didn't help, it would have to be dismantled to find the cause. Now I have read several times (also in other forums) that the brake booster can really cause such squeaking noises. It works, everything is normal, even the brake pressure. The car only has a 1 year used car warranty, which, according to the regulations, also covers the brake booster. However, the service person only wanted to make me believe if it were so, that I would have to pay in advance at least for the working time to dismantle (approx. 2 hours) and first submit a cost estimate. I bought the car used at an Audi dealer 2 months ago, EZ: 7/2015, A3 Sportback 1.4TFSI, S-Tronic, 22600KM. Has anyone here ever had problems with the brake booster on the A3 8V or an idea what else it could be?

Thank you in advance!

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12 answers

The reversal of the burden of proof does not yet apply in the first 6 months. New or used, it doesn't matter.

Notification of defects to the dealer with determination to remedy the defect.

Loud noises from the brake system are unacceptable.

The BKV is included in the assembly guarantee. Prepayment is bullshit ...

Hi,

For me it was the main brake cylinder, the noises are only transmitted to the BKV and you think it comes from the area. The noise of the HBZ has carried over to the brake pedal.

New HBZ came in and it was quiet again.

regardless of whether it is the HBZ or the BKV, an Audi dealer would actually have to swap it without hesitation in the case of such noises and not come along with statements such as: "You have to pay in advance and dismantle may not pay the guarantee" etc. Service advisor also said that it may be "only" a comfort problem (since there is only noise and no malfunction of the brake) ... Namely, I suspect that I have already fallen out of favor with them, because I already have one new double clutch, windshield and a broken front passenger seat panel on warranty and who are now slowly becoming stubborn with the next problem ... in the end I don't care if such defects appear after such a short time.

Quote:

@Red Wing14 wrote on November 20, 2018 at 2:01:00 p.m .:

regardless of whether it is the HBZ or the BKV, an Audi dealer would actually have to swap it without hesitation when there are noises like this and not come along with statements such as: "You have to pay in advance and dismantle may not pay the guarantee" etc. Have a bit of jitters because the Service advisor also said that it is possibly "only" a comfort problem (since there is only noise and no malfunction of the brake) ... I suspect that I have already fallen out of favor with them, because I already have one new double clutch, windshield and a broken front passenger seat panel on warranty and who are now slowly becoming stubborn with the next problem ... ultimately I don't care if such defects appear after such a short time.

Just drive to another contract partner ... if you do not receive direct help with such problems or if they are not right then go to the nearest authorized workshop. There are also a few good workshops where the employees are still motivated to help you.

The car was now in the workshop of another Audi contract partner for 2 days. On instructions from Audi, they first lubricated the corresponding bearings. But this has brought nothing. The next step should now be to replace the brake booster. However, it must first be clarified because of the assumption of costs (with the other Audi dealer from whom I bought the car) in order to then exchange the BKV in the next step, since according to Audi it is only a "comfort problem" and therefore it is probably not exchanged under warranty After I picked up the car yesterday evening, it now squeaks when you brake EVERYONE and it has become even louder than before. I wonder what they have done or lubricated ... I think I will now contact Audi customer service at the same time, as I do not see it as normal to recognize an annoying squeak with every braking process and probably a € 150 deductible for this Having to add a 1-year used car warranty, after all, I only have the car for 2.5 months and, given the age of the vehicle, such noises from the brake system should generally not occur.

Do not let go. If they keep beating around, then change the car. I have recently seen almost all authorized workshops that they get stupid. Who wonders. They don't really have much to give away at the moment ...

But the fun stops with the braking system.

After the workshop unnecessarily changed the brake booster and the pedal block in the first two attempts despite my reference to the master brake cylinder, they only saw it at the third workshop appointment and exchanged the master brake cylinder. Since then there has been silence :) thanks again @Ringfuchs

Thank you: D nevertheless embarrassing for the fact that the customer has to tell an Audi center certified with "Audi Top Service Partner 2018" and of course advertising what the problem could / is and needs 3 attempts to solve it ... I think unfortunately this is not an isolated case.

I also have this squeaking when I press the brake pedal .. I will probably have to look in the direction of the main train station ...