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Hissing noise

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October 15, 20223 yr

Hi Guys, just bought a 2007 A3 1.9TDI 140k on the clock and full service history. When you start it you get a hissing from the drivers foot well. Guessing a vacuum leak? it hiss's until you press the brake then it stops, release the brake and it starts again. Brakes work fine, anyone know what could i should be checking?

Thanks

Edited October 15, 20223 yr by Mactat2

October 15, 20223 yr

Could it be the brake servo?.

October 16, 20223 yr

Author

its certainly in the right area. Ill have a look tomorrow evening. Was just wondering if theres anything common that usually causes it?

Thanks Steve

October 22, 20223 yr

On 10/16/2022 at 7:35 PM, Mactat2 said:

its certainly in the right area. Ill have a look tomorrow evening. Was just wondering if theres anything common that usually causes it?

Thanks Steve

No probs at all. Did you get to the bottom of it?

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Engine / ECU to Injector wiring loom
New Members Introductions

Engine / ECU to Injector wiring loom

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Hissing noise

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Topics

Engine / ECU to Injector wiring loom

Are S5's notorious for not being serviced?

New 226 audi q3

Running boards 2024 black petrol standard model

C5 RS6 034 strut top mount

Help with some issues

Wing mirrors don't fold out when unlocking the car.

Park My A3 without having brakes on

A3 uncommanded engine shutdown

Audi A1 coil packs

Central locking

GEARBOX MALFUNCTION YOU CAN CONTINUE DRIVING

A% front suspension groan

Any ideas on what this sound could be? Audi A3 8P

Does anyone know what this high pitched noise is?

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