Foot Brake Puffing Air

[Cloverjo]

My son has my old VW Polo and says it feels like a puff of air is escaping from the brake when pressed. It still brakes safely. The car is about 13 years old and has only just started doing this. Is this something to worry about? I've had a quick Google and seen that it is a fairly frequent thing in different types of cars, but can't find anything about it in a Polo. Anyone know anything?

[quizman55]

Sounds like air is being admitted into the brake servo, needs checking, but as long as the pedal doesn't feel hard to press to stop the vehicle nothing too drastic.

[tonyav]

Probably a duff ( brake servo ) check valve or a split in one of the servo rubber pipes, jo.
https://www.clubpolo.co.uk/topic/214264-6n2-brake-servo-problem/

[Cloverjo]

Thank you, both. I'll tell him to get it checked.