What's causing my brakes to make a hissing noise?
My 2007 Audi A3 2.0 TDI quattro has started making a hissing noise when the brake pedal is depressed. It recently had a service, with new discs and pads all round. The brakes seem to be as efficient as they should be though. Any idea what's causing the sound?
Asked on 2 December 2016 by AudiDriver
Answered by
Honest John
I would guess the servo. When they sit in the bulkhead vent well they can rust on the underside. Obviously also worth checking the vacuum pipe to the servo and, because it's a diesel and needs a brake vacuum pump, check the pump as well.
Looking for a garage you can trust? Honest John's Good Garage Guide has thousands of reader recommended garages, plus how-to guides and tips on servicing.
The Good Garage GuideSimilar questions
I have a 2006 Kia Picanto, 58,000 miles. For the eight years I have owned it, it's has been more or less problem free. Now, after I've been going for about 10 minutes at reasonable speed, there is quite...
I have a 2007 Vauxhall Zafira that has very annoying squeal. It started in June 2012 and I hear it on almost every journey, intermittently. It appears to come from the driver front wheel. If I stop the...
We are experience a continuing groaning noise when bringing our 2004 KIA Sedona automatic to a stop. We have been back and forth to our local dealership with no joy. We have had the front discs and pads...
Related models
Classy hatchback with a premium interior. Wide choice of engines including efficient TDI models. quattro models corner sharply. S3 can be a blast to drive.
.jpg)
