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Old 01-02-2017, 06:04 PM   #1
blackoutbmw
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Hissing noise under steering wheel- Disappears when pressing brake

As title says, I have a hissing noise under the steering column. Now the immediate suggestion would be the Brake Booster is leaking. However all of the articles I've read related to Brake Booster leaks state that the hissing noise takes place when the brake pedal is depressed.

In my case, the hissing sound actually goes away when the brake pedal is depressed.

Maybe it's still the brake booster? Or something completely different. Can anyone help me out here?
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Old 01-02-2017, 08:42 PM   #2
TobyB
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Its the valve in booster- part of the cabin side of the booster.

Same fix- swap booster.

sorry,
t
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