Levent

Sometimes I feel like brakes hardened even in a city traffic.It feels almost like I've stopped the engine and braking ( not this much of course, but it is very obvious)and brake pedal comes to normal softness after a min. or so .
Also ESP light came on and I will go to service.
But this brake problem was there way before the light .
Any help will be very appriciated.

OTOF

No clue, but have you had your brake fluid level checked out?

OTOF

how long you've had the car...make sure that was done...think you have over 20k on your car ;-)

Levent

Yes ,checked. Also it's still 18K km. in 1.5 years. Thank you.

smallTTs

"Power brakes" use engine vacuum to increase the pedal force you apply. There is a check valve to prevent loss of the vacuum from the booster. If that leaks you should feel the pedal harden up as you hold it down. Remember, the engine is only producing intake manifold vacuum when NOT in a boost condition. Idle and closed throtle deceleration are highest vacuum conditions.

You could have a leak in the booster instead of the check valve. See the dealer about it in any case.

CraigsTT

The pedal all of a sudden it felt very hard after its 'normal' softness. I have had other brake issues with the pedal going all the way to the floor and not coming back up in very cold weather. This problem has not been found or fixed by service and has occurred 3-4 times last winter. At the time I thought it was the brake booster perhaps this is another symptom of the same problem.

TTeleven

Denny did interval change I thought it was 2 years never did the coupe at 20K

OTOF

D'oh ... posted that before my morning coffee and got it backwards...2 years is correct.

Levent

Great information. Thanks a lot.

Levent

Your problem is much frightening. Pedal going all the way down is not a nice feeling. :-(