funny buzzing noise coming from what i think is the brake servo

[cozzylee]

just been out to start the car this morning and there seems to be a buzzing noise coming from the brake servo which i have never heard before.I drove the car and it stopped but sometimes when i press the brake it does it any ideas what this could be hope its not expensive

[Mike Rainbird]

It is supposed to do this - it is the pump pressurising the ABS tank . It stops when the tank is pressurised (the round thing near the bulkhead) and starts up again when it needs to.

[cozzylee]

ahhhhhhhhh ive never noticed this before or maybe its doing it more than it should ha

[Mike Rainbird]

Normally you only notice it when you have the ignition on, bonnet open, but engine not running....

[cozzylee]

thanks for that mike i did have the bonnet up sorry i havent made payment for the carbon splitter and hockey sticks yet......a fine at the burnley blackburn game on sunday has put me back abit

[GLEN]

I get this too, only seemed to notice after having Clutch cable replaced, and thought it was the cos of the cable pulling on the Servo when depressed.

Also got told it was normal, just worried me cos i hadnt noticed it much before. Wierd though.