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Noise coming from brake booster

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Hello to all.
I’m looking for advice regarding a strange noise coming from the brake booster on a 2015 CR-V 5DR LCX 4WD.

will appreciate any comments on where can I start checking.
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Discussion Starter · #6 ·
are the brakes working properly? Did this started happening radomly?
Brakes are working ok. During my commute, car bahaves properly and no issues besides the random noise are found.

without revving the engine do you hear this noise?
It randomly occurs during driving. We figured that revving the engine was the only way to reproduce the issue.
 

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Check for voltage at the battery when revving the engine. See what's the highest voltage you are getting. You might have an Overvoltage situation.

From the behaviour of the ABS pump it sounds it is normal procedure that it makes more pressure , but the sound it makes it looks like something is binding inside the pump.
 
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