2001 Volvo V70 XC Q&A

2001 Volvo V70 XC Question: when I step on the brakes it sounds like there is air coming out what does that

it happens everytime I get in the car and back out to the main rd but after driving for about 5 mins the sound goes away -
Answer 1
SEE PREVIOUS POST -
Answer 2
THIS IS CAUSED BY THE BRAKE BOOSTER HAVING AN INTERNAL DIAPHRAM VACUME LEAK. CAUSING BRAKE BOOSTER VACUME PRESSURE TO ESCAPE WITCH CAN BE HEARD JUST OBOVE BRAKE PEDAL. . -